wilt and root rot complex of cool-season food legumes• black root rot resistant faba bean...
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NAPIA Biennial Meeting - 2015
Wilt and root rot complex of cool-season food legumes
Shiv Kumar AgrawalNov 7, 2015
Ontario, Canada
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Distributon of root rot diseases
Vigna species
Three major root diseases• Collar rot• Fusarium wilt• Dry root rot
Widespread (26 Countries)Losses up to 90%
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Temporal and Spatial Succession of root rots in South Asia
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ICARDA Research Platforms
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Development of resistance gene pool
• Sick plots– Syria– Lebanon– Ethiopia– Sudan– India
• Two season selections• International Fusarium
wilt nurseries• Hot spot screening for
collar rot (Bangladesh) and dry root rot (India)
Tel Hadya/Terbol
wilt sick plot
Ethiopia
wilt/root rot complex
India/Bangladesh
wilt/root rot complex
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Phenotyping for wilt in hydroponic system
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Screening of germplasm- FIGS Approach
0 50 100 150
010
2030
4050
60
Longitude
Latitude
Trait (disease score)Environment FIGS subset
www.icarda.org/
Lentil 11876 + 587Chickpea 15046 + 270
FIGs Set200 accessions in chickpea and lentil
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Successes• Wilt resistant chickpea varieties
• Wilt resistant lentil cultivars
• Black root rot resistant faba bean
Challenges• Collar rot in relay/CA practices in
rice based systems
• Dry root rot in chickpea and lentil
• Foot rot on faba bean
Successes and challenges with root rots…
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Combining resistance in new plant type
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Conclusions & Future Directions
• Diversified sources for resistance to wilt are available
• Limited or no resistance to collar and dry root rots
• Wilt resistance in improved lines incorporated
• Wilt resistance in red lentil and desi chickpea is morefrequent than in green lentil and kabuli chickpea
• Pathogenic variability and gene specific internationaldifferential sets
• Pyramiding of resistance genes for various racecombinations
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Grain Legumes Team
Thank you
2016 - International year of Pulses
International Conference on Pulses for Health, Nutrition and Sustainable Agriculture in Drylands (13-15 April 2016, Rabat)