NAPIA Biennial Meeting - 2015

Wilt and root rot complex of cool-season food legumes

Shiv Kumar AgrawalNov 7, 2015

Ontario, Canada

1

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%

Temporal and Spatial Succession of root rots in South Asia

3

ICARDA Research Platforms

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

5

Phenotyping for wilt in hydroponic system

6

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

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…

8

Combining resistance in new plant type

9

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

10

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)