Pathological, cultural variability and sequence diversity in Rhizoctonia bataticola causing dry root rot of chickpea
Duration: 15/May/2012 - 14/May/2015
Donor: Government department -national- state or local,Science & Engineering Research Board- Government of India-India
CGIAR Research Program: Grain Legumes
Rhizoctonia bataticola (Tassi) Goid. is a soil and seed-borne fungal pathogen and can infect more than 284 plant species globally, including monocot and dicot plant hosts. It is emerging as one of the most important constraints to chickpea production and can cause substantial crop losses in susceptible cultivar under favorable environmental condition in central and southern parts of India, the major chickpea growing regions of the country. With the shift in chickpea area from northern India to central and southern India, dry root rot is emerging as the most destructive constraint to chickpea productivity and production. The disease is more prevalent between flowering and podding stages especially during hot (temp 30-35o C) and dry (deficit soil moisture) environmental conditions. Cultivation of a resistant variety is an economical approach for the management of dry root rot of chickpea. However, in chickpea, the desired level of resistance to dry root rot is not known till now and often resistance identified at one location breaks down at another location, indicating the possibility of variability in the pathogen. Thus an understanding of the pathogenecity and genetic diversity of the pathogen is an important prerequisite in developing and deploying varieties with durable resistance to dry root rot disease. Thus development of a cost effective and user-friendly diagnostic tool to detect R. bataticola isolates in chickpea is the need of the hour. Understanding of the pathogen variability will help in developing multiple disease resistant varieties and their strategic deployment for the durability of resistance in molecular breeding programs.