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African maize farmers get support to mitigate impact of poor soils

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NAIROBI, Kenya (CIMMYT) – As the global community marks World Soil Day, African smallholder farmers are contending with low yields due to low-fertility soils prevalent in most parts of sub-Saharan Africa. This situation has affected the food security of over 300 million people in the region who depend on maize as their staple food.

For the majority of these smallholder farmers, access to inputs like fertilizers to boost soil productivity has been restricted due to their high cost. The reality is that in Africa fertilizers cost up to six times more than in any other continent.

As a result, nearly three quarters (about 70 percent) of eastern and southern Africa’s maize is grown without fertilizers. As the International Maize and Wheat Improvement Center (CIMMYT) and partners work to give farmers a partial solution to this enor

mous challenge, efforts must be intensified to protect and maintain soil resources for sustainable development in Africa and the globe.

The Improved Maize for African Soils (IMAS) Project addresses the problem of low nitrogen in soils. Smallholder farmers can expect to harvest up to 25 percent more from new maize varieties developed by the IMAS project.

These varieties are nitrogen use efficient (NUE), which means they utilize more efficiently the small amount of fertilizer that farmers can afford to apply (typically less than 20 kilograms per hectare) compared to varieties currently on the market. The IMAS project is a public-private partnership involving CIMMYT, the Kenya Agricultural and Livestock Research Organization, South Africa’s Agricultural Research Council and DuPont Pioneer.

In two years – between 2014 and 2015 – 21 NUE hybrids were successfully released in Tanzania, Malawi, Mozambique, South Africa, Uganda and Zimbabwe. In addition, IMAS helped to increase seed production and distribution of three existing NUE varieties. According to Michael Olsen, IMAS Project Leader, these varieties are expected to reach approximately 84,000 farmers.

“Giving smallholder farmers practical solutions within their environmental conditions is a sustainable means to not only preserve soil resources but address key challenges in maize farming, which is a major livelihood for millions in Africa,” Olsen said.

Many of the released NUE hybrids carry additional traits that are important in the region, such as tolerance to drought and maize lethal necrosis, a devastating viral disease that is new in the region. Donasiana Limo, a farmer from Olkalili village in northern Tanzania, attests to the good performance of HB513, a drought-tolerant and NUE variety he planted during the main cropping season between January and March 2015.

“I did not do much to prepare my land because the rains came very late and ended early. With no fertilizer and failed rains, I did not expect to harvest the seven bags of 50 kilograms from eight kilograms of HB513 seed,” Donasiana said.

“If I had time to prepare my land and added fertilizer, the harvest would have been so much more.”

Many more farmers from this remote village have benefited immensely from HB513, including Valeria Pantaleo.

Sustainable solutions for African farmers need to be addressed during World Soil Day deliberations. Efforts to facilitate smallholders’ access to inputs like fertilizers are critical. In addition, to help arrest further soil deterioration emphasis must be placed on adopting correct agronomic practices and appropriate crop varieties available on the market that are well suited to different soil management systems.

Policymakers must formulate strategies for adopting universal practices that maintain soil resources and are adapted to farming environments across Africa. Kenya has already set the pace for maize breeding in Africa by including performance in low-nitrogen soils as a special prerequisite for maize variety release, a step that will help enhance healthy soils in Africa if adopted by other regulatory agencies.

Links for more information

For information, please contact: Michael Olsen: IMAS Project Leader| Brenda Wawa: Media Contact

Agriculture ministers support policies to achieve Africa’s growth potential

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Participants in the SIMLESA high level policy forum in Entebbe, Uganda. Photo: Johnson Siamachira/CIMMYT
Participants in the SIMLESA high level policy forum in Entebbe, Uganda.
Photo: Johnson Siamachira/CIMMYT

East and Southern African countries need to formulate and implement appropriate policies to help smallholder farmers access technologies that will enable them to increase farm yields and improve crop resilience and nutrition to address poverty, food security, and economic growth, renowned Zimbabwean agricultural economist and academic Mandivamba Rukuni told a high-level policy forum.

Delivering the keynote address at the SIMLESA policy forum co-organized by CIMMYT and the Association for Strengthening Agricultural Research in Eastern and Central Africa (ASARECA) in Entebbe, Uganda, on 27–28 October, Rukuni said this can only be achieved through a dramatic shift to help smallholder farmers produce sufficient food for themselves, plus generate income. “Such technologies include improved seed varieties and fertilizers, and better infrastructure, such as roads and small-scale irrigation,’’ said Rukuni. SIMLESA is funded by the Australian Centre for International Agricultural Research (ACIAR) and implemented by CIMMYT.

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Boosting nutrition for Ethiopian children

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During 26-28 March 2012, CIMMYT scientists, partners, and collaborators met in Addis Ababa, Ethiopia, for the Inception Planning Workshop of the NuME project. NuME (Nutritious Maize for Ethiopia) is a new five-year USD 13 million project that aims to significantly reduce malnutrition, especially among young children, and increase food security and household income of resource-poor smallholder farmers in Ethiopia through the widespread adoption, production, and utilization of quality protein maize (QPM). QPM contains more than twice as much lysine and tryptophan as conventional maize, giving its protein a nutritive value that is roughly 90% that of milk.

The project, led by CIMMYT and supported by the Canadian International Development Agency (CIDA), is being implemented in collaboration with the Ethiopian Institute of Agricultural Research (EIAR), the Ministry of Agriculture (MoA), the Ministry of Health, the Ethiopian Health and Nutrition Research Institute (EHNRI), Sasakawa Africa Association (SAA), Sasakawa Global 2000 (SG2000), other NGOs, universities, and public and private seed companies. The purpose of the meeting was to present the approved project to partners; review, organize, and agree on the project’s management structure; review and agree on partner roles and responsibilities; and develop detailed work plans and budgets.

Project coordinator S. Twumasi-Afriyie gave an overview of the status of QPM in Ethiopia and pointed out that NuME was building on the achievements of the previous and largely successful CIDA-funded QPMD project that was implemented in Ethiopia, Kenya, Tanzania, and Uganda during 2003-2010.

Underscoring NuME’s importance, Twumasi said that diets in eastern and central Africa are largely based on maize, for it provides up to 80% of the calories consumed and is a primary weaning food for children. However, it is poor in two essential amino acids, lysine and tryptophan, putting infants who consume maize without protein supplements at risk for malnutrition and stunted growth and development. The problem is more acute in Ethiopia, where 47% of children are stunted, 38% are underweight, and 11% suffer from wasting.

Consequently, the project has targeted areas with high maize production and consumption, areas where farmers grow BH660 or other conventional maize varieties that now have QPM versions, and most importantly, areas with high malnutrition, according to Hugo De Groote, CIMMYT socio-economist.

Andreas Oswald, SAA director of crop productivity enhancement, outlined the strategies planned for demonstrating new QPM technologies, improved crop management practices, and post-harvest handling and processing to farmers, and for improving their knowledge and skills. Increasing the participation of women in NuME activities and identifying ways to ensure that they benefit substantively from QPM technologies are key goals of the project.

The project will also partner with Farm Radio International (FRI), which will work with Ethiopian radio stations to develop a gender sensitive campaign to help women and men farmers gain a better understanding of nutrition and protein, and to raise awareness of QPM and other strategies for improving the nutrition and health of families, especially children.

 

Zimbabwe and CIMMYT to establish maize lethal necrosis quarantine facility

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A modern quarantine facility to safely import maize breeding materials to southern Africa, and to enable local institutions to proactively breed for resistance against Maize Lethal Necrosis (MLN) disease, will be established this year at Mazowe, just outside Harare in Zimbabwe.

After the signing ceremony, BM Prasanna, MAIZE CRP Director, shakes hands with Ringson Chitsiko, the Permanent Secretary of Zimbabwe’s Ministry of Agriculture. Looking on, is Mulugetta Mekuria, CIMMYT-SARO Regional Representative. Photo: Johnson Siamachira
After the signing ceremony, BM Prasanna, MAIZE CRP Director, shakes hands with Ringson Chitsiko, the Permanent Secretary of Zimbabwe’s Ministry of Agriculture. Looking on, is Mulugetta Mekuria, CIMMYT-SARO Regional Representative. Photo: Johnson Siamachira

After the signing ceremony, BM Prasanna, MAIZE CRP Director, shakes hands with Ringson Chitsiko, the Permanent Secretary of Zimbabwe’s Ministry of Agriculture. Looking on, is Mulugetta Mekuria, CIMMYT-SARO Regional Representative. Photo: Johnson Siamachira

The announcement was made on 3 August 2015 at the signing ceremony of a Memorandum of Agreement (MoA) between CIMMYT and the Government of Zimbabwe. Ringson Chitsiko, the Permanent Secretary of Agriculture, Mechanization and Irrigation Development, signed on behalf of the Government of Zimbabwe while BM Prasanna, Director of MAIZE CRP and CIMMYT’s Global Maize Program, represented CIMMYT.

“MLN is a reality that cannot be ignored. We have to work together to control its spread. We need to focus on finding practical solutions to tackle this complex challenge, including strengthening MLN disease diagnostic and surveillance capacity, while we continue with intensive inter-institutional efforts to develop and deploy improved maize varieties that incorporate MLN resistance. The commercial seed sector must also play a key role by producing and delivering MLN-free healthy seed to farmers,” said Prasanna during the MoA signing ceremony.

The MLN Quarantine Facility, the first of its kind in southern Africa, will be set up by CIMMYT before the end of this year at the Plant Quarantine Institute in Mazowe, Mashonaland Central Province, one of Zimbabwe’s important research facilities run by the Department of Research and Specialist Services (DR&SS).

MLN was first detected in Kenya’s Rift Valley region in September 2011, and has since been reported in Tanzania, Uganda, Democratic Republic of Congo, Rwanda and Ethiopia. It is caused by a double infection of maize plants by two viruses: maize chlorotic mottle virus and sugarcane mosaic virus. There is an urgent need to prevent the deadly disease from moving further south.

Prior to signing of the MoA, Joseph Made, Zimbabwe’s Minister of Agriculture, discussed with Prasanna and CIMMYT-Southern Africa Regional Office (CIMMYT-SARO) senior staff how to strengthen maize research and development in Zimbabwe. “The Government of Zimbabwe is honored to be selected to host the new facility, which is important for stopping the spread and impact of MLN,” said Made.

To strengthen the phytosanitary work at the MLN Quarantine Facility, CIMMYT will also offer capacity building to DR&SS researchers through trainings, technical assistance, and advisory services, according to Prasanna. “This MLN Quarantine Facility, and the collaborative efforts between institutions of the Government of Zimbabwe, especially DR&SS and CIMMYT-SARO, are key in our efforts to prevent the possible spread of MLN in Africa,” said Prasanna.

Mulugetta Mekuria, CIMMYT-SARO Regional Representative said that the new collaboration to set up the MLN Quarantine facility in Zimbabwe would further enrich the long-standing and successful partnership between CIMMYT-SARO and DR&SS.
After the signing ceremony, officials from CIMMYT and DR&SS visited the site at the Plant Quarantine Institute at Mazowe where the MLN Quarantine Facility will be established, and discussed implementation arrangements, including steps for strengthening the national phytosanitary capacity.

Government of Zimbabwe and CIMMYT to establish maize lethal necrosis quarantine facility at Mazowe

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A modern quarantine facility to safely import maize breeding materials to southern Africa, and to enable local institutions to proactively breed for resistance against Maize Lethal Necrosis (MLN) disease, will be established this year at Mazowe, just outside Harare in Zimbabwe.

The announcement was made on 3 August 2015 at the signing ceremony of a Memorandum of Agreement (MoA) between CIMMYT and the Government of Zimbabwe. Ringson Chitsiko, the Permanent Secretary of Agriculture, Mechanization and Irrigation Development, signed on behalf of the Government of Zimbabwe while BM Prasanna, Director of MAIZE CRP and CIMMYT’s Global Maize Program, represented CIMMYT.

“MLN is a reality that cannot be ignored. We have to work together to control its spread. We need to focus on finding practical solutions to tackle this complex challenge, including strengthening MLN disease diagnostic and surveillance capacity, while we continue with intensive inter-institutional efforts to develop and deploy improved maize varieties that incorporate MLN resistance. The commercial seed sector must also play a key role by producing and delivering MLN-free healthy seed to farmers,” said Prasanna during the MoA signing ceremony.

The MLN Quarantine Facility, the first of its kind in southern Africa, will be set up by CIMMYT before the end of this year at the Plant Quarantine Institute in Mazowe, Mashonaland Central Province, one of Zimbabwe’s important research facilities run by the Department of Research and Specialist Services (DR&SS).

MLN was first detected in Kenya’s Rift Valley region in September 2011, and has since been reported in Tanzania, Uganda, Democratic Republic of Congo, Rwanda and Ethiopia. It is caused by a double infection of maize plants by two viruses: maize chlorotic mottle virus and sugarcane mosaic virus. There is an urgent need to prevent the deadly disease from moving further south.

Prior to signing of the MoA, Joseph Made, Zimbabwe’s Minister of Agriculture, discussed with Prasanna and CIMMYT-Southern Africa Regional Office (CIMMYT-SARO) senior staff how to strengthen maize research and development in Zimbabwe. “The Government of Zimbabwe is honored to be selected to host the new facility, which is important for stopping the spread and impact of MLN,” said Made.

After the signing ceremony, BM Prasanna, MAIZE CRP Director, shakes hands with Ringson Chitsiko, the Permanent Secretary of Zimbabwe’s Ministry of Agriculture. Looking on, is Mulugetta Mekuria, CIMMYT-SARO Regional Representative. Photo: Johnson Siamachira

To strengthen the phytosanitary work at the MLN Quarantine Facility, CIMMYT will also offer capacity building to DR&SS researchers through trainings, technical assistance, and advisory services, according to Prasanna. “This MLN Quarantine Facility, and the collaborative efforts between institutions of the Government of Zimbabwe, especially DR&SS and CIMMYT-SARO, are key in our efforts to prevent the possible spread of MLN in Africa,” said Prasanna.

Mulugetta Mekuria, CIMMYT-SARO Regional Representative said that the new collaboration to set up the MLN Quarantine facility in Zimbabwe would further enrich the long-standing and successful partnership between CIMMYT-SARO and DR&SS.

After the signing ceremony, officials from CIMMYT and DR&SS visited the site at the Plant Quarantine Institute at Mazowe where the MLN Quarantine Facility will be established, and discussed implementation arrangements, including steps for strengthening the national phytosanitary capacity.

Maize that packs a punch in face of adversity: unveiling new branded varieties for Africa

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Even in the best years, significant swathes of sub-Saharan Africa suffer from recurrent drought. Drought wreaks havoc on the livelihoods of millions of Africans – livelihoods heavily leaning on rain-dependent agriculture without irrigation, and with maize as a key staple. And that is not all: drought makes a bad situation worse. It compounds crop failure because its dry conditions amplify the susceptibility of maize in farmers’ fields to disease-causing pests, whose populations soar during drought.

Providing maize farmers with context-specific solutions to combat low yields and chronic crop failure is a key priority for CIMMYT and its partners, such as those in the Water Efficient Maize for Africa (WEMA) Project.

“Our main focus is to give famers durable solutions,” remarks Dr. Stephen Mugo, CIMMYT Regional Representative for Africa and a maize breeder, who also coordinates CIMMYT’s work in WEMA. “These seeds are bred with important traits that meet the needs of the farmers, with ability to give higher yields within specific environments.”

Farmers in Kenya, Uganda, Tanzania and South Africa will soon access WEMA’s high-yielding drought-tolerant maize hybrids. In total, 13 hybrids were approved for commercial production by relevant authorities in these countries. These approvals were spread between October 2014 and March 2015 in the various countries.

Kenya’s National Variety Release Committee (NVRC) approved four hybrids in February 2015 (WE2109, WE2111, WE2110 and WE2106), while neighboring Uganda’s NVRC also approved four hybrids at the end of 2014 (WE2101, WE2103, WE2104 and WE2106). Across Uganda’s southern border, in March 2015, the Tanzania Official Seed Certification Institute approved for commercial release WE3117, WE3102 and WE3117. Still further south, South Africa’s Department for Agriculture registered two hybrids (WE3127 and WE3128) in October 2014.

In each country, all the hybrids successfully underwent the mandatory National Performance Trials (NPTs) and the Distinctness, Uniformity and Stability (DUS) tests to ascertain their qualities and suitability for use by farmers.

Varieties that pack a punch
In Kenya, these new WEMA varieties boast significantly better yields when compared to varieties currently on the market as well as to farmer varieties in drought-prone areas of upper and lower eastern, coastal, central and western Kenya.

And that is not all: across them, the new hybrids also have resistance to rampant leaf diseases like maize streak virus, turcicum leaf spot and gray leaf spot.

Dr. Murenga Mwimali of the Kenya Agricultural and Livestock Research Organization, who is also WEMA’s Country Coordinator in Kenya, explains: “These hybrids are expected to give farmers an average yield of three tonnes per hectare in moderate drought and eight tonnes in good seasons. These are better seeds that will help Kenyans fight hunger through increased productivity.” According to the UN Food and Agricultural Organization, Kenya’s national average productivity in 2013 was a meager 1.6 tonnes per hectare. This compares poorly with South Africa’s 6 tonnes, Egypt’s 9 tonnes and USA’s 9–12 tonnes, as generally reported in other statistics.

Where to find them
The seed of these new varieties should be available in the market once selected seed companies in Uganda and Tanzania produce certified seeds by end of August 2015.

Dr. Allois Kullaya, WEMA Country Coordinator in Tanzania, applauded this achievement and the partnership that has made it possible. “Through the WEMA partnership, we have been able to access improved seed and breeding techniques. The hybrids so far released were bred by our partner CIMMYT and evaluated across different locations. Without this collaboration, it would not have been possible to see these achievements.” said Dr. Kullaya.

In South Africa, close to 10,000 half-kilo seed packs of WE3127 were distributed to smallholder farmers to create awareness and product demand through demonstrations to farmers and seed companies.

This seed-pack distribution was through local extension services in the provinces of Eastern Cape, Free State, KwaZulu–Natal, Limpopo, Mpumalanga and North-West.

Three seed companies also received the hybrid seed to plant and increase certified seed for the market.

Where it all begins – the CIMMYT ‘cradle’, crucible and seal for quality assurance
“In the WEMA partnership, CIMMYT’s role as the breeding partner has been to develop, test and identify the best hybrids for yield, drought tolerance, disease resistance and adaptability to local conditions,” says Dr. Yoseph Beyene, a maize breeder at CIMMYT and WEMA Product Development Co-leader.

To do this, more than 10, 000 new hybrids combinations are evaluated each year to identify new hybrids that will perform most consistently in various conditions. Hybrids that look promising are subjected to a rigorous WEMA-wide area testing. Only those that pass the test get the CIMMYT nod and ‘seal of approval’. But the tests do not end there: for independent and objevhe verfication, the final test  is that these select few advance to  – and are submitted for – country NPTs.

Dr. Beyene explains: “Because of these rigorous testing, hybrids that are adapted in two or three countries have been identified and released for commercial production to be done by regional and multinational seed companies which market hybrids in different countries. This eases the logistics for seed production, distribution and marketing.”

How to recognize the new varieties – distinctive shield against drought
All the hybrids released under the WEMA project will be sold to farmers under the trade-name DroughtTEGO™. ‘Tego’ is Latin for cover, protect or defend. The African Agricultural Technology Foundation (AATF), which coordinates the WEMA Project, has sub-licensed 22 seed companies from the four countries to produce DroughtTEGO™ seeds for farmers to buy.

WEMA’s achievements are premised on a powerful partnership of scientists from CIMMYT, national agricultural research institutes from the five WEMA target countries (Kenya, Tanzania, Uganda, Mozambique and South Africa), AATF and Monsanto.

WEMA is funded by the Bill & Melinda Gates Foundation, the United States Agency for International Development and the Howard G. Buffet Foundation.

Links: More on WEMA | WEMA 2015 annual meeting in Mozambique | Insect Resistant Maize in Africa Project (completed in 2014)

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MLN diagnostics and management in Africa through multi-institutional synergies

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MLN coverMaize Lethal Necrosis (MLN) disease has continued to wreak havoc on maize production in East Africa since it was first reported in Kenya in 2011, and since then reported in the Democratic Republic of the Congo, Ethiopia, Rwanda, Tanzania, South Sudan and Uganda. The disease, caused by a combination of the Maize Chlorotic Mottle Virus (MCMV) and Sugarcane Mosaic Virus (SCMV), causes irreversible damage that kills maize plants before they can grow and yield grain. MLN pathogens can be transmitted not only by insect vectors but also through contaminated seed. The epidemic is exacerbated by lack of MLN-resistant maize varieties and year round cultivation of maize in many areas in eastern Africa, enabling the build-up of virus inoculum and allowing transmission via insect vectors. For this reason, CIMMYT scientists Monica Mezzalama, Biswanath Das, and B.M. Prasanna have developed a brochure “MLN Pathogen Diagnosis, MLN-free Seed Production and Safe Exchange to Non-Endemic Countries” for providing important information on these key areas to stakeholders, especially seed companies and regulatory agencies operating in both MLN-affected as well as MLN non-endemic countries.

“MLN is an increasing regional threat to food security in sub-Saharan Africa, and must be tackled with concerted effort from all actors in order to safeguard the maize seed sector and protect the livelihoods of smallholder farmers,” said Prasanna. The brochure proposes several key steps to curb the spread of MLN, through MLN diagnostics, production of MLN-free seed, and safe exchange to MLN-endemic countries. The brochure also advises on appropriate agronomic practices that can prevent disease incidence in seed production fields.

An International Conference on “MLN Diagnostics and Management in Africa” will be organized jointly by AGRA (Alliance for Green Revolution in Africa) and CIMMYT during 12-14 May in Nairobi, Kenya, in order to review the present status of MLN incidence and impacts in sub-Saharan Africa (SSA), controlling seed transmission of MLN, managing seed production in MLN-endemic countries, creating awareness about MLN diagnostic protocols, and identifying ways to strengthen MLN diagnostics capacity in SSA, among other topics.

Maize lethal necrosis: a serious threat to food security in eastern Africa and beyond

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Participants are shown how to inspect maize fields for MLN symptoms and how to collect samples for laboratory analysis.

Maize lethal necrosis (MLN) has rapidly emerged as one of the deadliest maize diseases in eastern Africa capable of causing complete yield loss under heavy disease pressure. This means that Kenya and neighboring countries which largely depend on maize as their main staple food and source of income are on the verge of a looming food and economic crisis.

The disease is difficult to control for two reasons: firstly, it is caused by a combination of viruses; secondly, it can be spread through seed and by insect vectors that may be carried by wind over long distances. Affected crops suffer various symptoms such as severe stunting, tassel abnormality, small ears with poor seed set, chlorotic leaf mottling, leaf necrosis and premature plant death.

Much more than CIMMYT and East Africa

Sixty phytosanitary regulators and seed industry scientists from 11 countries in eastern and southern Africa attended an MLN diagnostics and screening workshop from March 17–19, 2015, in Naivasha, Kenya. The objective of the workshop was to train scientists on the latest MLN diagnostics and screening methods and to share knowledge on how to control the spread of MLN. Besides DR Congo, Ethiopia, Kenya, Rwanda and Tanzania where the disease has been reported, other participants were from South Sudan and southern Africa (Malawi, Mozambique, South Africa, Zambia and Zimbabwe) that have no confirmed cases of MLN, but where maize is an important crop.

CIMMYT organized the workshop in response to the high demand for development of appropriate diagnostics methods and harmonization of regional protocols. Hence, facilitation by agencies like the Food and Agricultural Organization provided a much-needed regional overview of the MLN threat, in addition to perspectives from the International Centre of Insect Physiology Ecology and the Kenya Plant Health Inspectorate Services (KEPHIS) on MLN insect vectors and diagnostics methods respectively.

The workshop was conducted at the MLN screening facility in Naivasha, the largest of its kind established in response to the MLN outbreak in eastern Africa in 2013. It supports countries in the sub-Saharan region to screen seeds under artificial inoculation. The facility is managed jointly by the Kenya Agricultural and Livestock Research Organization (KALRO) and CIMMYT, and was established with support from the Bill & Melinda Gates Foundation and the Sygenta Foundation for Sustainable Agriculture. Biswanath Das, a maize breeder at CIMMYT, noted that “the site has evaluated more than 20,000 accessions since its inception in 2013 from over 15 multinational and national seed companies and national research programs.” This, he added, “has become a primary resource in the fight against MLN regionally.”

Collective pre-emptive actions for prevention: seeds of hope
Participants received hands-on training to identify symptoms of MLN-causing viruses and how to score disease severity by screening germplasm at the site. For some participants, this was a first. “This is my first time to see an MLN-infected plant. Now I understand the impact of MLN on maize production and the need to set up a seed regulatory facility. South Sudan has no laboratory to test planting materials. My first step will be to talk to my counterparts in the ministry to set up one,” said Taban James, a regulator from the Ministry of Agriculture in South Sudan.

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CIMMYT staff demonstrate DAS–ELISA method used for detecting MLN-causing viruses.

The tragic reality is that almost all commercial maize varieties in East Africa are highly susceptible to MLN, based on evaluations done at the screening facility. Therefore, stronger diagnostic and sampling capacity at common border-points was agreed to be a key step towards controlling inadvertent introduction of MLN through contaminated seeds. This was particularly important for participants from southern Africa countries who noted an urgent need for surveillance at seed import ports and border areas to contain the spread.

Currently, Kenya, Uganda and Zimbabwe are the only countries that require imported seed to be certified as free of MLN-causing viruses. KEPHIS and CIMMYT have worked closely to restrict movement of germplasm from Kenya to countries in East Africa with reported MLN cases. Seed production fields are inspected thrice by KEPHIS, in addition to analysis of final seed lots. Plans are underway for CIMMYT in collaboration with the ministries of agriculture in Mexico and Zimbabwe to establish quarantine sites to ease germplasm movement in and out of these countries. Speaking on KEPHIS’ role, Francis Mwatuni, the officer-in-charge of Plant Quarantine and Biosecurity Station said, “We ensure all seed fields are inspected and samples tested for MLN resistance including local and imported seed lots from seed companies, to ensure that farmers get MLN-free seeds.”

The latest trends and options for diagnostics on MLN-causing viruses were covered as well, giving participants hands-on training using ELISA diagnostics systems. They were also briefed on polymerase chain reaction based diagnostics and the latest lateral flow diagnostic kits that are under development that will enable researchers to obtain diagnostic results in the field in minutes.

What next for MLN?
The rapid multiplication of the disease coupled with uncertainties over its spread is the biggest hurdle that scientists and other stakeholders are grappling with. KALRO Chief Researcher, Anne Wangai, who played a key role in discovering the disease in Kenya in 2011 observes that “The uncertainties over the transmission of MLN is a worrying phenomenon that requires stakeholders to urgently find a control point to manage and ensure seeds being given to farmers are MLN-free.”

Breeding remains a key component in the search for long-term solution for MLN, and several milestones have been covered to develop MLN-resistant varieties in East Africa. “CIMMYT has developed five hybrids with good MLN tolerance under artificial inoculation, which have either been released or recommended for release in Kenya, Uganda and Tanzania. Thirteen hybrids are currently under national performance trials in the three countries,” noted Mosisa Regasa, a maize seed system specialist at CIMMYT. He further added that it is critical for the MLN-tolerant hybrids to also have other traits important to farmers, so farmers accept these new hybrids.

Open information sharing forums like the diagnostics workshop are an important step to raise awareness and seek solutions to manage the disease. Sharing best practice and lessons learnt in managing the disease are major steps towards curbing MLN. In pursuit of this end, a major international conference on MLN opens next week.

Links: Slides from the workshop | Workshop announcement |Open call for MLN screening – May 2015

USAID Approves USD 17.8 Million Grant for a New Project to Support Seed Scaling in Eastern and Southern Africa

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CIMMYT has received a grant of USD 17.8 million from the United States Agency for International Development (USAID) to implement a new project dubbed Drought Tolerant Maize for Africa Seed Scaling (DTMASS). The three-year project officially started on 15 March 2015.

The project aims to produce and deploy affordable and improved drought-tolerant, stress-resilient and high-yielding maize varieties for 1.8 million smallholder farmers in Ethiopia, Kenya, Tanzania, Uganda, Mozambique and Zambia by the end of the project. Similarly, DTMASS plans to produce approximately 7,900 metric tons of maize varieties with a strategic goal of improving food security and income for the farmers.

“This is a great achievement for the project team, which worked tirelessly to develop the project proposal that has just been approved for implementation”, remarked Tsedeke Abate, DTMASS project leader. He added that the project will go a long way in supporting farmers to increase their returns from maize farming, while at the same time giving them good-quality maize for consumption. “This is a good day for maize in Africa,” said Tsedeke.

DTMASS will be implemented in close collaboration with USAID’s Feed the Future program, building on experience, successes and lessons from the Drought Tolerant Maize for Africa and other complementary CIMMYT maize projects in Africa like Improved Maize for African Soils and Water Efficient Maize for Africa, to strengthen production and delivery of maize seeds to farmers in the seven target countries.

CIMMYT will also work with the respective countries’ extension wings of the ministries of agriculture, public and private seed companies, national agricultural research organizations, community-based organizations and non-governmental organizations. More on DTMASS

DTMA launches new project to improve seed scaling in Eastern Africa

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Born out of the Drought Tolerant Maize for Africa (DTMA) Initiative and other CIMMYT-Africa maize projects, the Drought Tolerant Maize for Africa Seed Scaling (DTMASS) project will improve the demand for and availability of high-quality, affordable, certified seed of drought-tolerant maize varieties for small-scale farmers across eastern and southern Africa.

“DTMASS aims to produce close to 12,000 tons of certified seed of drought-tolerant maize varieties by the end of its fifth year,” said Tsedeke Abate, DTMA project leader who will also lead DTMASS, speaking at the Uganda launch of the project in Kampala on 4 February. “This will benefit approximately 2.5 million people through the increased production and productivity of maize and the adoption of improved certified seed.”

According to Abate, DTMASS will strengthen the formal seed system, thereby reducing counterfeit seed use, lowering the risk of seed-borne maize diseases and helping to maintain productivity as climates change.

Working in Ethiopia, Kenya, Malawi, Mozambique, Tanzania, Uganda and Zambia, DTMASS will encourage cross-country learning and collaboration, Abate explained: “We have the knowledge and technology – what remains is translating knowledge to action.”

DTMASS countries account for 41 percent of maize area and production, and over 252 million people in sub-Saharan Africa.

A pillar of the project will be its strong partnerships with private and public seed companies, community-based organizations, non-governmental organizations and national extension systems. Fifty-three seed companies have already agreed to produce seed of 71 drought-tolerant varieties.

These partnerships enable increased and improved certified seed to reach small-scale farmers, increase farm production and enhance productivity, according to Dr. Imelda Kashaija, deputy director at Uganda’s National Agricultural Research Organization (NARO). “This project is at the right place at the right time,” she said.

DTMASS launched officially on 17-18 November 2014 in Addis Ababa, Ethiopia. The goal for Uganda in 2015 is to produce 1,800 tons of improved maize seed.

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Photo: Ngila Kimotho/Dryland Seed Company

Partnership on maize lethal necrosis in Africa makes significant progress

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Partners of the Maize Lethal Necrosis (MLN) project in Africa, funded by the Bill & Melinda Gates Foundation and Syngenta Foundation for Sustainable Agriculture (SFSA), came together to review and discuss the progress and next steps for the project at a workshop on 14-15 May.

“The primary goal of this project is to identify MLN-tolerant germplasm, including inbred lines and pre-commercial hybrids, for potential deployment of MLN-tolerant varieties (with other relevant adaptive traits) through partners in Sub-Saharan Africa. The project also seeks to gain information regarding the genetics of resistance to the disease, create awareness and build capacity for more effective MLN management.

Group photograph taken at the MLN Screening Facility, Naivasha, Kenya. Photo: Florence Sipalla/CIMMYT

“As the project matures, we will be screening additional promising germplasm coming out of the MLN screening facility at Naivasha and from national agricultural research institute (NARI) partners at satellite testing centers in Kenya, Tanzania and Uganda under high natural disease pressure. This will help to validate the performance of the germplasm under MLN in important agro-ecologies,” said CIMMYT Global Maize Program Director and MLN-Africa project leader, BM Prasanna.

Mike Robinson, chief scientific advisor at SFSA and representatives of several seed companies and NARIs in Kenya, Tanzania and Uganda participated in the MLN Field Day at Naivasha on 14 May. The companies included East African Seed, Kenya Seed Company, Meru Agro, Monsanto, DuPont Pioneer and Seed Co Limited. “We hope to submit several germplasm entries for trials at the MLN screening facility in the next planting season,” said Francis Ndambuki, a maize breeder with Kenya Seed Company.

Less than a year after its opening, the MLN screening facility is now fully functional, evaluating materials from several partner organizations, including the International Institute for Tropical Agriculture, NARIs and seed companies. The partners/ visitors had an opportunity to see several trials taking place at the facility, as well as promising MLN-tolerant germplasm. Scientists involved in this project are working intensively – in collaboration with national and international institutions to develop and validate virus inoculation and germplasm screening protocols. They are also testing a large array of germplasm for responses against MLN under artificial inoculation, developing diagnostic techniques and building the capacity of national partners in MLN diagnostics and management.

The CIMMYT seed systems team is working on scaling-up the identified MLN-tolerant germplasm and distributing it to interested public and private partners in Africa. The progress made on the project’s diverse fronts was presented in detail, and the next steps were discussed during the project meeting held in Nairobi on 15 May. “We are pleased that CIMMYT teamed with KARI to address this important issue for Africa,” said Joseph Mureithi, KARI deputy director. Mureithi continued, “The MLN screening facility at Naivasha is a model of partnership between CGIAR centers, NARIs and the private sector,” adding that the results of the trials at the facility would have far-reaching impact. “Stresses such as drought and poor soil fertility could potentially compound the expression of the MLN disease,” said KARI virologist Dr. Anne Wangai, a key partner in this project. “This is a great opportunity to demonstrate the confluence of technologies – breeding, pathology and entomology,” said Robinson, urging the project partners to further strengthen the scientific edge and demonstrate how the research being undertaken on the disease can quickly result in products that benefit African farmers affected by the disease.

“Policy advocacy is key,” said Wilfred Mwangi, CIMMYT’s regional representative for Africa. He emphasized the need to fast-track registration and commercialization of the MLN-tolerant hybrids, especially in the MLN-affected countries. The Kenya Plant Health Inspectorate Service (KEPHIS) was commended for its commitment and support in fast-tracking the release of promising MLN-tolerant hybrids. “There is fast progress on the MLN research and the first wave of improved materials is coming now,” said Robinson, adding that he is looking forward to seeing more materials in the future. He emphasized the importance of coordination, policy clarity, communication and international synergies on MLN research and development in Africa.

Sasakawa Africa Association celebrates the 100th anniversary of Norman Borlaug’s birth

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The Sasakawa Africa Association (SAA) recently joined numerous countries and organizations around the world that have taken time this year to pay tribute to the life and achievements of Dr. Norman Borlaug, holding a series of events from 8-12 July in Uganda to celebrate what would have been his 100th birthday. The theme of the celebration was “Take it to the farmer,” in honor of Dr . Borlaug’s inspiring final words.

The SAA/Sasakawa Global 2000 (SG2000) was founded in 1986 by Japanese philanthropist Ryoichi Sasakawa, former U.S. President Jimmy Carter and Borlaug, who was the president of SAA until his death in 2009.

The Sasakawa Africa Association was named Best Overall Exhibitor at the Nile Agricultural and Trade Show, one of the events organized as part of the Borlaug centenary celebration. Photo: Adefris Teklewold/CIMMYT

Celebration events were attended by numerous dignitaries, including Yohei Sasakawa, son of the founder and Chairman of the Nippon Foundation; Professor Ruth Oniang’o, Chairperson of SAA and the Sasakawa Africa Fund for Extension Education (SAFE); Rhoda Peace Tumusiime, African Union Commissioner of Rural Economy and Agriculture; Dr. John Hardman, President and Chief Executive Officer of the Carter Center (representing President Carter); Nicéphore Dieudonné Soglo, former President of Benin, SAA Board member and former Executive Director of the World Bank; Dr. Amit Roy, President and CEO of the International Fertilizer Development Center, or IFDC (Borlaug served on the IFDC board for 11 years); and Ambassador Kenneth Quinn, President of the World Food Prize Foundation (which was founded by Borlaug). The Borlaug family was represented at the ceremony by his daughter Jeanie Borlaug Laube and his granddaughter Julie Borlaug. CIMMYT was represented by Adefris Teklewold, project leader of the Nutritious Maize in Ethiopia project, which is implemented in partnership with SG2000. Key members of the Ugandan government also took part, including Edward Ssekandi, Vice President of the Republic of Uganda; Gen. Moses Ali, Second Prime Minister of the Republic of Uganda; and Tress Bucyanayandi, Minister of Agriculture, Animal Industry and Fisheries of the Republic of Uganda.

The celebration began with a National Symposium on Training and Research for Agricultural Development at Makerere University, organized by SAA in collaboration with the university’s College of Agricultural and Environmental Sciences. The topic of the symposium was Extension and Training for Agricultural Transformation and recognized the partnership between SAA and Makerere University in executing SAFE for many years through the Department of Extension and Innovation Studies. Topics included: extension for agricultural modernization; strengthening agricultural extension through mid-career training; how to attract youth in agriculture; the relevance of universities in agricultural transformation: going beyond the rhetoric of gender in agriculture; and more. Oniang’o chaired the symposium’s opening session about Borlaug’s legacy and said, “Dr. Borlaug believed in young people as future farmers and as advocates against hunger.”

Students and faculty from schools around the country took part in debate, drama, essay and dance competitions. Prizes were awarded to the winners at the closing ceremony. Photo: Adefris Teklewold/CIMMYT

A special video tribute to Borlaug – “Play it hard – the Borlaug Way” – was shown during the opening session, with words of acknowledgment for CIMMYT. This was followed by a video message from Carter. Representatives of organizations that had links to Borlaug through SAA honored his legacy.

Sasakawa recounted the story of how his father approached Borlaug to establish the SAA and persuaded him to be SAA president. Sasakawa described Borlaug as a “fearless fighter” and said that through SAA, he “not only helped farmers to increase their yield, but he also succeeded in planting the seed of confidence in their hearts.”

Another major event organized in connection with the centenary celebration was the Nile Agricultural and Trade Show at Jinja Town, which is located at the headwaters of the White Nile. The trade fair wasorganized by the Uganda National Farmers’ Federation in collaboration with SAA. The main objective of the trade show was to create a platform whereby different stakeholders – farmers, researchers, manufacturers, consumers, traders, policy makers, students and financial institutions – could meet to identify advances, challenges and comparisons related to Uganda’s agriculture sector. Schoolchildren also staged colorful drama and dance performances at the trade fair to pay tribute to Borlaug for his work with smallholder farmers around the world. Different agricultural technologies and inputs available for adoption were also displayed.

The main event of the commemoration was a two-day symposium held in Jinja, “Take it to the Farmer: The Borlaug Legacy for Uganda.” The symposium was attended by senior Ugandan governmental officials and focused on the enduring results of the Borlaug legacy for both Uganda and Africa. During the symposium, Ssekandi said of Borlaug, “His achievements and contribution to humanity is a long narrative of one man’s love for other people, as exhibited by his contribution to the eradication of hunger in Africa and Uganda.”

As part of the commemoration to honor Borlaug, competitions were held in schools around the country in areas where SAA is working. Students and faculty held debates on agricultural issues, drama and dance performances, and an essay challenge on the status and future of agriculture in Uganda.

Maize lethal necrosis screening facility seeing signs of success

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CIMMYT pathologist George Mahuku and MLN technician Janet Kimunye examine tassels for pollen production on an infected plant. MLN causes a symptom called ‘tassel blast’ where the tassels of infected plants do not shed or produce pollen. Photos courtesy of George Mahuku

By George Mahuku and Florence Sipalla/CIMMYT

Germplasm screening at the maize lethal necrosis (MLN) screening facility at the Kenya Agricultural Research Institute (KARI) Naivasha is underway, and CIMMYT pathologist George Mahuku said some inoculated lines are showing levels of resistance.

He described the green islands among the maze of yellow in the fields as a demonstration of the success of the testing protocols being used at the site. “This is the lifeline for farmers,” he said. “Next we will be incorporating genes from these lines into adapted germplasm and using the Doubled Haploid facility in Kiboko to quickly develop inbred lines with resistance to MLN.”The deadly maize disease was first identified in Kenya in 2011 and has since been diagnosed in the Democratic Republic of Congo, Rwanda, Tanzania and Uganda. The MLN screening facility was established in 2013 with funding from the Bill & Melinda Gates Foundation and the Syngenta Foundation for Sustainable Agriculture to serve maize breeding institutions in Sub-Saharan Africa in response to 2014 the emergence of the disease.

CIMMYT pathologist George Mahuku inspecting plants that show tolerance to MLN in Naivasha, Kenya.

“To date, we have planted more than 19,000 different types of germplasm on 15 hectares,” Mahuku said. “This germplasm was submitted by both private and public sector partners, including CIMMYT and the International Institute of Tropical Agriculture (IITA).”

All germplasm has been inoculated, Mahuku said, and symptoms are fully visible. Operations at the facility include maintaining pure strains of the viruses that cause MLN, producing inoculum for artificial inoculation, evaluating maize hybrids and inbred lines for response to MLN and building the capacity of stakeholders including scientists, technicians, farmers and extension workers to handle the disease.

The facility also provides employment opportunities for the community, hiring more than 30 people for activities such as weeding, irrigation and disease scoring. Because the facility screens germplasm from different countries, it’s isolated from farmers’ maize plots and certified as a quarantine site. “We still do not fully understand the variability in virus strains, whether the virus strains in Rwanda, Tanzania or Uganda are the same as the ones in Kenya,” said Mahuku.

After disease evaluations, all plant debris will be disposed of by incineration. The facility has received many visitors from universities, international organizations and public and private institutions. “There is a lot of interest in learning and knowing the disease,” Mahuku said.

It recently hosted two scientists from Ethiopia who will share the knowledge gained with their colleagues and will conduct surveys to assess whether the disease is in their country. “To see all this going well is breathtaking,” said CIMMYT technician Janet Kimunye, who is in charge of virus maintenance, inoculum production and inoculations in the field and has been involved in MLN research from the beginning, initially as a consultant to CIMMYT.

“We have assembled a really good team here; watching them work way into the night and weekend is heartening,” said Mahuku. “Everybody wants a solution to this problem that is threatening their food security.”

One of the greenhouses where artificial inoculum is produced and multiplied for research purposes.

Facts about the Facility:

  • Area planted: 15 ha
  • Number of rows: 49,500
  • Total germplasm: 19,539
  • Inoculated area: 6.5 ha
  • Disease expression: 4.5 ha is under disease evaluation as symptoms are expressing well

Sources of Germplasm Sources of Entries Screened

  • CIMMYT/IITA: 13,699
  • Private sector (seed companies): 3,781
  • Public institutions (NARS): 2,059
  • Total: 19,539

Update: CIMMYT maize inbred lines and pre-commercial hybrids with potential resistance to maize lethal necrosis (MLN)

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By B.M. Prasanna/CIMMYT

Since 2011 MLN has become a disease of serious concern in Kenya, Tanzania, Uganda and possibly Rwanda. CIMMYT has been working in close collaboration with the Kenya Agricultural Research Institute (KARI), private sector partners and virology experts from the USA to combat the disease through host-controlled resistance.

MLN-susceptible line (CML505) versus MLN-resistant inbred line (CLRCY034).

A CIMMYT-KARI MLN screening facility was established at Naivasha in September 2013, and a large array of maize germplasm is presently being evaluated against the disease under artificial inoculation. Subsequent to the development of effective protocols, CIMMYT and KARI have been conducting MLN screening trials in Kenya since 2012, to identify promising inbred lines and pre-commercial maize hybrids with resistance to MLN.

A promising pre-release CIMMYT hybrid versus an MLN-susceptible commercial check.

This is the second update of the information on potential MLN-resistant or moderately resistant inbred lines and pre-commercial hybrids (crossed with CIMMYT varieties), following the first update that was shared with public and private sector partners in May 2013. An evaluation of CIMMYT inbred lines and pre-commercial hybrids was done under artificial inoculation during 2013-2014 in two independent trials, at Narok and Naivasha sites in the Rift Valley, Kenya (Tables 1 and 2).

In each trial, the entries were grown in at least two replications, and MLN severity scores were recorded at different stages of crop growth (vegetative and reproductive stages) on a 1-5 scale (1 = no disease symptoms, 5 = extensive damage). The highest MLN severity score recorded across different trials on a particular entry, and the corresponding disease response rating, are presented here. For a list of the new lines and hybrids, click here.

 

Update: CIMMYT maize inbred lines and pre-commercial hybrids with potential resistance to maize lethal necrosis (MLN)

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A promising pre-release CIMMYT hybrid versus an MLN-susceptible commercial check. Since 2011 MLN has become a disease of serious concern in the east African countries of Kenya, Tanzania, Uganda and possibly Rwanda. CIMMYT has been working in close collaboration with the Kenya Agricultural Research Institute (KARI), private sector partners and virology experts from the USA to combat the disease through host-controlled resistance. A CIMMYT-KARI MLN Screening Facility was established at Naivasha in September 2013, and a large array of maize germplasm is presently being evaluated against the disease under artificial inoculation. Subsequent to the development of effective protocols, CIMMYT and KARI have been conducting MLN screening trials in Kenya since 2012, to identify promising inbred lines and pre-commercial maize hybrids with resistance to MLN.  This is the second update of the information on potential MLN-resistant or moderately resistant inbred lines and pre-commercial hybrids (in CIMMYT genetic backgrounds), following the first update that was shared with public and private sector partners in May 2013.

An evaluation of CIMMYT inbred lines and pre-commercial hybrids was done under artificial inoculation during 2013-2014 in two independent trials, at Narok and Naivasha sites in the Rift Valley, Kenya (Tables 1 and 2).  In each trial, the entries were grown in at least two replications, and MLN severity scores were recorded at different stages of crop growth (vegetative and reproductive stages) on a 1-5 scale (1 = no disease symptoms, 5 = extensive damage). The highest MLN severity score recorded across different trials on a particular entry, and the corresponding disease response rating, are presented here.

Table 1. Responses of selected CIMMYT maize inbred lines to artificial inoculation with MLN
at Narok and Naivasha, Kenya (2013-2014)

Inbred line

Kernel color

Heterotic Group

Max. MLN severity score

Disease response rating
CLRCY039

Y

B

2.0

R
CLYN261

Y

A

2.0

R
CLRCY034

Y

B

2.0

R
CKDHL120552

W

A

2.3

MR
CKDHL120161

W

B

2.4

MR
CKDHL120668

W

B

2.4

MR
CKDHL120664

W

B

2.4

MR
CML494

W

B

2.5

MR
TZMI730*

W

B

2.5

MR
CKDHL120918

W

B

2.5

MR
CML550

W

B

2.6

MR
CML543 (CKL05003)

W

B

2.7

MR
CKDHL120671

W

B

2.7

MR
CLA106

Y

B

2.7

MR
CKSBL10205

W

AB

2.7

MR
CKSBL10194

W

AB

2.8

MR
CML535 (CLA105)

Y

B

2.8

MR
CKSBL10060

W

A

2.9

MR
CKDHL121310

W

B

3.0

MR
DTPYC9-F46-1-2-1-2-B

Y

A

3.0

MR
CKDHL0500

W

B

3.0

MR

*IITA Inbred Line

Abbreviations
Y: Yellow; W: White
Disease Response Rating
R: Resistant (max. MLN severity score ≤2.0)
MR: Moderately resistant (max. MLN severity
score ≥2.0 but ≤3.0)
S: Susceptible (max. MLN severity score >3.0)		 MLN Severity Scoring (1-5 Scale)
1 = No MLN symptoms
2 = Fine chlorotic streaks on lower leaves
3 = Chlorotic mottling throughout plant
4 = Excessive chlorotic mottling and dead heart
5 = Complete plant necrosis

 

Table 2. Responses of selected CIMMYT pre-commercial hybrids under artificial inoculation
against MLN at Narok and Naivasha, Kenya (2013-2014)

Hybrid Pedigree

Max. MLN severity score

Disease response rating
CKH12613 Under NPT in Tanzania

2.25

MR
CKH12622 CML444/CML445//CLWN234

2.33

MR
CKH12603 Under NPT in Uganda

2.37

MR
CKH12623 CML539/CML442//CLWN234

2.38

MR
CKH12624 CML539/CML442//CML373

2.45

MR
CKIR12014 CML312/CML442// CKSBL10028

2.49

MR
CKH12625 CML444/CML445//CML373

2.50

MR
CKIR12007 CML78/P100C6-200-1-1-B-B-B-B-B// CKSBL10014

2.50

MR
CKDHH0970 CKDHL0089/CKDHL0323//CKDHL0221

2.50

MR
CKIR11024 CML78/P300C5S1B-2-3-2-#-#-1-2-B-B-#// CKSBL10060

2.51

MR
CKH12607 Under NPT in Tanzania

2.51

MR
CKH10085 Under NPT in Kenya

2.62

MR
CKH12600 Under NPT in Uganda and Tanzania

2.66

MR
CKH12627 CLRCW106//CML444/CML395

2.70

MR
CKDHH0943 CKDHL0159/CKDHL0282//CKDHL0214

2.75

MR
CKDHH0945 CKDHL0089/CML395//CKDHL0214

2.75

MR
CKH12626 CML395/CML488//CML373

2.77

MR

Note: The responses of the promising hybrids mentioned above are being validated through
experiments at the MLN Screening Facility in Naivasha

MLN Severity Scoring (1-5 Scale)
1 = No MLN symptoms
2 = Fine chlorotic streaks on lower leaves
3 = Chlorotic mottling throughout plant
4 = Excessive chlorotic mottling and dead heart
5 = Complete plant necrosis		 Disease Response Rating
R: Resistant (max. MLN severity score ≤2.0)
MR: Moderately resistant (max. MLN severity
score ≥2.0 but ≤3.0)

 

 For further information on:

  • MLN research-for-development efforts undertaken by CIMMYT, please contact:
    Dr. B.M. Prasanna, Director, Global Maize Program, CIMMYT, Nairobi, Kenya;
    Email: b.m.prasanna@cgiar.org
  • Availability of seed material of the promising lines and pre-commercial hybrids, please contact:
    Dr. Mosisa Regasa (m.regasa@cgiar.org) if your institution is based in eastern Africa, or Dr. James Gethi (j.gethi@cgiar.org) if your institution is based in southern Africa or outside eastern and southern Africa.