Staff of the International Soil Borne Pathogens Research and Development Center along with the Minister, deputy ministers, TAGEM’s DG, and high-level officials of the Ministry of Agriculture Forestry. (Photo: TAGEM)
Soil-borne pathogens (SBP) are a serious threat to Turkey’s food security, especially as climate extremes (temperature, precipitations) become more commonplace. SBP are an array of specific adverse effects, such as root rot, wilt, yellowing, and dwarfing caused by fungi, bacteria, viruses, and nematodes. These pathogens can cause 50-75% yield loss in crops.
On May 2, 2023, the International Maize and Wheat Improvement Center (CIMMYT) Country Representative in Turkey, Abdelfattah Dababat, joined the inauguration ceremony of the International Soil-Borne Pathogens Research & Development Center (ISBPRDC).
Vahit Kirişci, Turkish Minister of Agriculture and Forestry, inaugurated the Center, which is the first of its kind in the Central West Asia and North Africa (CWANA) region dedicated to advancing research on SBPs and developing innovative solutions to control and prevent their spread.
The opening ceremony took place at the Directorate of Plant Protection Central Institute working under the General Directorate of Agricultural Research and Policies (TAGEM), and it was attended by deputy ministers, TAGEM’s DG, and high-level officials of the Ministry of Agriculture and Forestry.
Serving under the auspices of the General Directorate of Agricultural Research and Policies (TAGEM), part of the Turkish Minister of Agriculture and Forestry, the ISBPRDC will meet international standards for sanitary conditions.
CGIAR and TAGEM mutually supported the SBP CIMMYT Turkey program by establishing and funding the ISBPRDC.
Bringing partners together
CIMMYT is signing a collaboration agreement with the ISBPRDC to facilitate knowledge exchange and technology transfer between the two institutions, which will support joint research and development activities aimed at improving crop health and productivity.
“The most effective way forward to battle against threats to food security is through cooperation,” said Dababat. “This collaboration is a great opportunity for Turkey’s seed industry to maintain its competitive advantage in foreign markets.”
Professor Vahit Kirişci, Turkish Minister of Agriculture and Forestry, TAGEM’s DG, CIMMYT’s Representative, and high-level officials from the Ministry of Agriculture and Forestry. (Photo: TAGEM)
Thirty-five scientists and technicians will work at the ISBPRDC and the institute will act as an umbrella for all SBP research in Turkey. Bahri Dağdaş International Agricultural Research Institute (BDIARI), the Transitional Zone Agricultural Research Institute (TZARI), and the Plant Protection Central Research Institute (PPCRI) with offices in Konya, Eskisehir, and Ankara, respectively, will support the ISBPRDC center and collaborate with the SBP program at CIMMYT to deliver high-yielding wheat germplasm that is resistant to SBP.
Among new programs at the center are the development of a robust surveillance system to track pathogens, a genebank for germplasm, and screening facilities for resistance against SBP.
Mustafa Alisarli, Bolu Abant Izzet Baysal University rector, is awarded for hosting this symposium by the representative of the Turkish Ministry of Agriculture and Forestry, General Directorate of Agricultural Research and Policies (GDAR), Dr Suat Kaymak.
The International Maize and Wheat Improvement Center (CIMMYT) coordinated the VIII International Cereal Nematode Symposium between September 26-29, in collaboration with the Turkish Ministry of Agriculture and Forestry, the General Directorate of Agricultural Research and Policies and Bolu Abant Izzet Baysal University.
As many as 828 million people struggle with hunger due to food shortages worldwide, while 345 million are facing acute food insecurity – a crisis underpinning discussions at this symposium in Turkey focused on controlling nematodes and soil-borne pathogens causing reduced wheat yields in semi-arid regions.
A major staple, healthy wheat crops are vital for food security because the grain provides about a fifth of calories and proteins in the human diet worldwide.
Seeking resources to feed a rapidly increasing world population is a key part of tackling global hunger, said Mustafa Alisarli, the rector of Turkey’s Bolu Abant Izzet Baysal University in his address to the 150 delegates attending the VIII International Cereal Nematode Symposium in the country’s province of Bolu.
Suat Kaymak, Head of the Plant Protection Department, on behalf of the director general of the General Directorate of Agricultural Research and Policies (GDAR), delivered an opening speech, emphasizing the urgent need to support the CIMMYT Soil-borne Pathogens (SBP) research. He stated that the SBP plays a crucial role in reducing the negative impact of nematodes and pathogens on wheat yield and ultimately improves food security. Therefore, the GDAR is supporting the SBP program by building a central soil-borne pathogens headquarters and a genebank in Ankara.
Discussions during the five-day conference were focused on strategies to improve resilience to the Cereal Cyst Nematodes (Heterodera spp.) and Root Lesion Nematodes (Pratylenchus spp.), which cause root-health degradation, and reduce moisture uptake needed for proper development of wheat.
Richard Smiley, a professor emeritus at Oregon State University, summarized his research on nematode diseases. He has studied nematodes and pathogenic fungi that invade wheat and barley roots in the Pacific Northwest of the United States for 40 years. “The grain yield gap – actual versus potential yield – in semiarid rainfed agriculture cannot be significantly reduced until water and nutrient uptake constraints caused by nematodes and Fusarium crown rot are overcome,” he said.
Experts also assessed patterns of global distribution, exchanging ideas on ways to boost international collaboration on research to curtail economic losses related to nematode and pathogen infestations.
A special session on soil-borne plant pathogenic fungi drew attention to the broad spectrum of diseases causing root rot, stem rot, crown rot and vascular wilts of wheat.
Soil-borne fungal and nematode parasites co-exist in the same ecological niche in cereal-crop field ecosystems, simultaneously attacking root systems and plant crowns thereby reducing the uptake of nutrients, especially under conditions of soil moisture stress.
Limited genetic and chemical control options exist to curtail the damage and spread of these soil-borne problems which is a challenge exacerbated by both synergistic and antagonistic interactions between nematodes and fungi.
Nematodes, by direct alteration of plant cells and consequent biochemical changes, can predispose wheat to invasion by soil borne pathogens. Some root rotting fungi can increase damage due to nematode parasites.
Integrated managementFor a holistic approach to addressing the challenge, the entire biotic community in the soil must be considered, said Hans Braun, former director of the Global Wheat Program at CIMMYT.
Braun presented efficient cereal breeding as a method for better soil-borne pathogen management. His insights highlighted the complexity of root-health problems across the region, throughout Central Asia, West Asia and North Africa (CWANA).
Richard A. Sikora, Professor emeritus and former Chairman of the Institute of Plant Protection at the University of Bonn, stated that the broad spectrum of nematode and pathogen species causing root-health problems in CWANA requires site-specific approaches for effective crop health management. Sikora added that no single technology will solve the complex root-health problems affecting wheat in the semi-arid regions. To solve all nematode and pathogen problems, all components of integrated management will be needed to improve wheat yields in the climate stressed semi-arid regions of CWANA.
Building on this theme, Timothy Paulitz, research plant pathologist at the United States Department of Agriculture Agricultural Research Service (USDA-ARS), presented on the relationship between soil biodiversity and wheat health and attempts to identify the bacterial and fungal drivers of wheat yield loss. Paulitz, who has researched soil-borne pathogens of wheat for more than 20 years stated that, “We need to understand how the complex soil biotic ecosystem impacts pathogens, nutrient uptake and efficiency and tolerance to abiotic stresses.”
Julie Nicol, former soil-borne pathologist at CIMMYT, who now coordinates the Germplasm Exchange (CAIGE) project between CIMMYT and the International Center for Agricultural Research in the Dry Areas (ICARDA) at the University of Sydney’s Plant Breeding Institute, pointed out the power of collaboration and interdisciplinary expertise in both breeding and plant pathology. The CAIGE project clearly demonstrates how valuable sources of multiple soil-borne pathogen resistance in high-yielding adapted wheat backgrounds have been identified by the CIMMYT Turkey program, she said. Validated by Australian pathologists, related information is stored in a database and is available for use by Australian and international breeding communities.
Economic losses
Root-rotting fungi and cereal nematodes are particularly problematic in rainfed systems where post-anthesis drought stress is common. Other disruptive diseases in the same family include dryland crown and the foot rot complex, which are caused mainly by the pathogens Fusarium culmorum and F. pseudograminearum.
The root lesion nematode Pratylenchus thornei can cause yield losses in wheat from 38 to 85 percent in Australia and from 12 to 37 percent in Mexico. In southern Australia, grain losses caused by Pratylenchus neglectus ranged from 16 to 23 percent and from 56 to 74 percent in some areas.
The cereal cyst nematodes (Heterodera spp.) with serious economic consequences for wheat include Heterodera avenae, H. filipjevi and H. latipons. Yield losses due to H. avenae range from 15 to 20 percent in Pakistan, 40 to 92 percent in Saudi Arabia, and 23 to 50 percent in Australia.
In Turkey, Heterodera filipjevi has caused up to 50 percent crop losses in the Central Anatolia Plateau and Heterodera avenae has caused up to 24 percent crop losses in the Eastern Mediterranean.
The genus Fusarium which includes more than a hundred species, is a globally recognized plant pathogenic fungal complex that causes significant damage to wheat on a global scale.
In wheat, Fusarium spp. cause crown-, foot-, and root- rot as well as head blight. Yield losses from Fusarium crown-rot have been as high as 35 percent in the Pacific Northwest of America and 25 to 58 percent in Australia, adding up losses annually of $13 million and $400 million respectively, due to reduced grain yield and quality. The true extent of damage in CWANA needs to be determined.
Abdelfattah Dababat, CIMMYT’s Turkey representative and leader of the soil-borne pathogens research team said, “There are examples internationally, where plant pathologists, plant breeders and agronomists have worked collaboratively and successfully developed control strategies to limit the impact of soil borne pathogens on wheat.” He mentioned the example of the development and widespread deployment of cereal cyst nematode resistant cereals in Australia that has led to innovative approaches and long-term control of this devastating pathogen.
Dababat, who coordinated the symposium for CIMMYT, explained that, “Through this symposium, scientists had the opportunity to present their research results and to develop collaborations to facilitate the development of on-farm strategies for control of these intractable soil borne pathogens in their countries.”
Paulitz stated further that soil-borne diseases have world-wide impacts even in higher input wheat systems of the United States. “The germplasm provided by CIMMYT and other international collaborators is critical for breeding programs in the Pacific Northwest, as these diseases cannot be managed by chemical or cultural techniques,” he added.
Closing ceremony of the International Cereal Nematode Symposium. From left to right; Hans Braun, Brigitte Slaats, Richard Sikora, Grant Hollaway, Mesut Keser, Zahra Maafi, Richard Smiley, Mustafa Imren, Fatih Ozdemir, Amer Dababat. (Photo: CIMMYT)
Road ahead
Delegates gained a greater understanding of the scale of distribution of cereal cyst nematodes and soil borne pathogens in wheat production systems throughout West Asia, North Africa, parts of Central Asia, Northern India, and China.
After more than 20 years of study, researchers have recognized the benefits of planting wheat varieties that are more resistant. This means placing major emphasis on host resistance through validation and integration of resistant sources using traditional and molecular methods by incorporating them into wheat germplasm for global wheat production systems, particularly those dependent on rainfed or supplementary irrigation systems.
Sikora stated that more has to be done to improve Integrated Pest Management (IPM), taking into consideration all tools wherever resistant is not available. Crop rotations for example have shown some promise in helping to mitigate the spread and impact of these diseases.
“In order to develop new disease-resistant products featuring resilience to changing environmental stress factors and higher nutritional values, modern biotechnology interventions have also been explored,” Alisarli said.
Brigitte Slaats and Matthias Gaberthueel, who represent Swiss agrichemicals and seeds group Syngenta, introduced TYMIRIUM® technology, a new solution for nematode and crown rot management in cereals. “Syngenta is committed to developing novel seed-applied solutions to effectively control early soil borne diseases and pests,” Slaats said.
It was widely recognized at the event that providing training for scientists from the Global North and South is critical. Turkey, Austria, China, Morocco, and India have all hosted workshops, which were effective in identifying the global status of the problem of cereal nematodes and forming networks and partnerships to continue working on these challenges.
Byrd C. Curtis, director of CIMMYT’s Global Wheat Program from 1982 to 1988. (Photo: CIMMYT)
The International Maize and Wheat Improvement Center (CIMMYT) sadly notes the passing of Byrd C. Curtis, former Director of the Global Wheat Program, on January 7. He was 95 years old and lived in Fort Collins, Colorado, USA, with his wife Eloise Curtis.
From his studies at Oklahoma State University to retiring after a fruitful international career with Colorado State University, Cargill Inc. and CIMMYT, he never got weary of sharing his passion for breeding better, tastier and sturdier wheat to improve peoples’ livelihoods.
He was an innovator at heart and his legacy will live on through Colorado State University’s wheat breeding program and the many wheat varieties he developed. Not only did he start Colorado State University’s wheat breeding program in 1963, but he also ensured that the varieties that were bred by his team reflected the needs of humanity for decades to come, such as the hard, red winter wheat variety named after himself.
Curtis worked at CIMMYT from 1982 and 1988 as Director of the Global Wheat Program. Together with his team, he worked to position CIMMYT as the leading international research-for-development and breeding organization for wheat for years to come.
“Byrd was very keen to build oral communication skills of scientists, which has been very helpful to me,” said Ravi Singh, Head of Global Wheat Improvement at CIMMYT. “He also initiated the Turkey-CIMMYT-ICARDA International Winter Wheat Improvement Partnership’s (IWWIP) winter wheat breeding program and even worked there in Turkey in his final year with CIMMYT to ensure it would take off well.”
Byrd was instrumental and showed tremendous foresight. IWWIP’s establishment in Turkey became first major breeding program within CGIAR that was hosted by a national program. He strongly supported the creation of the Wide Crossing Program. The synthetic wheat varieties developed in this program have had global impact on wheat improvement.
Aside from his remarkable technical legacy, Byrd had a knack for choosing the right people for the job. In the six years as Director of the Global Wheat Program, he hired scientists who held major roles in global wheat improvement: Ravi Singh, Distinguished Scientist and Head of Global Wheat Improvement; Wolfgang Pfeiffer, former leader of spring bread wheat, durum wheat, and triticale crop improvement; and Hans Braun, Director of the Global Wheat Program from 2004 to 2020.
“Byrd not only initiated the winter wheat program,” said former Global Wheat Program Director Hans Braun, who was hired by Byrd in 1983. “He was also director when the tropical wheat program was implemented in Thailand.” This program’s work increased yields up to 1.5 tons per hectare but ultimately did not convince Thai farmers. Nevertheless, Braun said, “One of the oddest experiences I’ve had was to see our winter wheat material from Turkey grown in the Thai jungle!”
After retiring from his professional life in 1991, Curtis and his wife Eloise moved back to Fort Collins, where his career started in the 1960s and where he will be remembered by his townspeople — and fellow athletes and gym-goers — for his determination and active lifestyle.
The CIMMYT community sends its deepest sympathies and wishes for peace to the Curtis family.
At the end of 2019, the International Maize and Wheat Improvement Center (CIMMYT) will say goodbye to Alexey Morgunov, head of the International Winter Wheat Improvement Program (IWWIP) in Turkey.
A native of Russia, Morgunov joined CIMMYT as a spring wheat breeder in 1991 working with Sanjaya Rajaram, former Global Wheat Program director and World Food Prize laureate. Morgunov went on to work as a breeder of winter wheat in Turkey in 1994 and later to Kazakhstan, where he helped generate new wheat varieties and technologies for Central Asia and the Caucasus region.
Since 2006 he has led the International Winter Wheat Improvement Program (IWWIP), a highly-productive collaboration between Turkey, the International Center for Research in Dry Areas (ICARDA), and CIMMYT.
As part of that program, Morgunov contributed to the development of more than 70 widely grown wheat varieties in Central and West Asia and, in 2013, to a national wheat landrace inventory in Turkey. He has also helped develop and characterize synthetic wheats — created by crossing modern durum wheat with grassy relatives of the crop — and used them in breeding to broaden the diversity of winter wheat.
Alex Morgunov (right) with World Food Prize laureate and former CIMMYT wheat program director Sanjaya Rajaram. (Photo: Alex Morgunov/CIMMYT)
A professional journey across Central Asia
Morgunov said his childhood in rural Russia instilled in him the importance of agriculture and of education.
“My parents, who lived in rural Russia, went through hunger and were trying to make sure that their children worked somewhere close to food production so that we wouldn’t go hungry,” he explained. “They said: ‘OK, Alex, you go to an agricultural university and you will not be hungry.’ ”
After his university studies, Morgunov joined the Plant Breeding Institute at Cambridge as a visiting scientist in the late 1980s, where he crossed paths with CIMMYT scientists seeking to partner with the newly independent states of the former Soviet Union. After an interview in 1991, he was invited to join the CIMMYT team in Mexico as a wheat breeder.
He was later posted to Kazakhstan to build relationships in Central Asia, a period he cites as a standout. “In the late 90s CIMMYT started working with Central Asian countries experiencing severe food security issues,” he said. “They didn’t really have any technologies or varieties for grain production, so we started a program in 95/96 which later developed into a CGIAR program.”
“We had great impact in those countries at the time, introducing zero tillage in Kazakhstan, new seed varieties in Tajikistan after the civil war, and high-yielding rust-resistant varieties to Uzbekistan.”
Reflecting on his time at CIMMYT, it was the friends and connections he made that stood out the most for Morgunov.
“The thing I most enjoyed was communicating with colleagues,” Morgunov said. “You start working in Kazakhstan and other places and building up cooperation and technical relationships and, over time, these relationships become friendships that we enjoy for as long as we live. I think this is very satisfactory for us as human beings.”
One of Morgunov’s passions is sailing. (Photo: Alex Morgunov)
Despite his plans to retire, Morgunov still plans to continue working — but on his own terms. “My wife is from Kazakhstan so we will be moving there and I plan to continue working in a different capacity and different schedule,” he explains. “Some Russian universities are writing to me to participate in projects and also universities from Kazakhstan. I have a couple of PhD students in Kazakhstan so I’d like to move more into the educational side of things, working with younger people.”
He was also given an Adjunct Faculty position by Washington State University early this year and will volunteer for them.
Morgunov has also recommended that CIMMYT creates an “emeritus” status for long-serving colleagues retiring from the organization, so they can continue to support the organization.
It won’t be all work though. Morgunov is a devoted tennis player and plans to improve his backhand. A keen sailor, he also hopes to spend more time on the waves and visiting new countries.
The International Wheat Improvement Program was established as a cooperative international research effort by the Turkish national wheat research program and the International Maize and Wheat Improvement Center (CIMMYT) in 1986. The International Center for Agricultural Research in the Rural Areas (ICARDA) joined the program in 1990, integrating its highland wheat breeding program.
The main objective of IWWIP is to develop winter/facultative wheat germplasm for the region of Central and West Asia. IWWIP is fully integrated into the national Turkish wheat program, with a strong connection to partners within and outside the region, such as eastern Europe and the United States.
The program is governed by a steering committee. Three coordinators — Beyhan Akin from CIMMYT, Mesut Keser from ICARDA and Fatih Ozdemir from the Turkish national wheat research program — provide technical leadership.
IWWIP focuses on the development of elite wheat lines for rainfed and irrigated areas in Central and West Asia.
Since the inception of the program, more than 105 winter wheat varieties originating from IWWIP germplasm have been released. Germplasm from IWWIP is sent each year to approximately 100 cooperators in 50 countries, making it an important vehicle for the global exchange of winter wheat germplasm.
Core traits for rainfed areas are yield and yield stability, drought and heat tolerance, resistance to three cereal rusts and soil-borne diseases — nematodes, crown and root rots —, and end-use quality. Other traits considered for specific areas are resistance to Septoria leaf blight and insects. For irrigated and high-rainfall areas, breeding focuses on yield potential, cereal rusts, Septoria and quality.
Germplasm with special traits, such as resistance to stem rust and Russian wheat aphid, and Sun pest vegetative stage resistance, is developed in nurseries and shared with IWWIP cooperators. IWWIP distributes four International Winter Wheat Nurseries each year, targeted for semiarid and irrigated conditions: Facultative and Winter Wheat Observation Nurseries (FAWWONs) FAWWON-SA and FAWWON-IRR, and the replicated International Winter Wheat Yield Trials (IWWYTs) IWWYT-SA and IWWYT-IRR.
In 2018, IWWIP established a speed-breeding facility at the Aegean Agricultural Research Institute in Menemen, Izmir, with the capacity to grow 20,000 plants in one cycle. This facility allows for greater genetic gain by increasing the number of generations per year and reducing the time it takes to incorporate new traits into elite germplasm.
IWWIP uses multi-location testing in Turkey as well as shuttle breeding globally, serving as a successful model for a jointly operated breeding program between national and international institutes. Shuttle breeding to improve drought and heat tolerance and cold tolerance has been working well and produces novel germplasm with abiotic stresses tolerance.
Major IWWIP contributions:
Close cooperation with CIMMYT’s Soil Borne Pathogens Group to identify genotypes with resistance to nematodes and root rots, used in breeding programs in the region and beyond.
A national inventory of wheat landraces in Turkey (2009-2014), with collections from over 1,500 farmers from 68 provinces. The collected material was characterized and deposited in the Turkish Gene Bank in Ankara. The best accessions are currently used as parents, undergoing further study by the Turkish National Program and IWWIP, and being used in the development of primary synthetic winter wheat for breeding diverse and resilient wheat varieties.
High-quality data that has increased selection efficiency to develop yellow-rust-resistant cultivars.
Substantial improvement in stem rust resistance through shuttle methodology between Turkey and Kenya.
Publication of NDVI and digital photos for germplasm evaluation under irrigated and drought conditions.
IWWIP has played a major role in building the capacity of young researchers through long-term practical training at CIMMYT, ICARDA, and Turkish national wheat breeding programs; participation in traveling seminars; support for participation in regional conferences and IWWIP annual meetings; and on-site visits of IWWIP breeders.
