Characterization of Akhanaphou, an unique landrace from North-East India and its RIL population for rice leaf and neck blast resistance

Order of Publishing in Issue: 
Volume :12
Issue :2
April, 2018 - June, 2018
Page No: 
Supriya Babasaheb Aglawe[1], Umakanth Bangale[1], S J S Rama Devi[1], Vishalakshi Balija[1], Vijay Pal Bhadana[1], Susheel Kumar Sharma[2], Sudhir Kumar[3], M. Srinivas Prasad[1] and Maganti Sheshu Madhav[1]*
[1]Biotechnology Division, Indian Institute of Rice Research, Rajendranagar, Hyderabad-500 030
[2]Plant Pathology Division, ICAR Research Complex for NEH Region, Manipur Centre, Imphal-795 004
[3]Crop Improvement Division, ICAR Research Complex for NEH Region, Manipur Centre, Imphal-795 004

Rice blast is continues to be the major constraint in sustainable rice production throughout the world. Although many genetic resources harboring single R-genes are available for blast resistance, wide genetic variations exist in the blast fungus lead to breakdown of these resistant varieties soon after its release. To control such a deadly disease, there is a need to identify QTLs which offer durable partial resistance. In this endeavor, we identified Akhanaphou, a unique rice landraces of Manipur showing a high level of resistance to leaf and neck blast across various locations. Upon genetic characterization, we found resistance in Akhanaphou governed by QTLs and two major genes i.e Pi38 and Pitp. Three best stabilized recombinant inbred lines (RILs) showing resistance for leaf and neck blast and having significant homozygosity at various loci were identified based on gene profiling, phenotyping, and agronomic evaluation studies. The shortlisted RILs are valuable genetic resources for the development of blast resistance in rice improvement programs.

Akhanaphou, Neck blast, Gene profiling, Pi38 and Pitp.
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