National Academy of Agricultural Sciences (NAAS)
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PRINT ISSN : 2319-7692
Online ISSN : 2319-7706 Issues : 12 per year Publisher : Excellent Publishers Email : editorijcmas@gmail.com / submit@ijcmas.com Editor-in-chief: Dr.M.Prakash Index Copernicus ICV 2018: 95.39 NAAS RATING 2020: 5.38 |
The Bacterial blight disease caused by Xanthomonas oryzae pv. oryzae (Xoo) is one of the most important disease and has caused crop failure in rice crops. This pathogen infects the leaves in all plant growth phases. The purpose of this study is to work out pathogenic diversity of seven Xoo isolates obtained from Chhattisgarh based on their interactions with 24 near-isogenic rice lines (NILs). The results showed, all the isolates were varying in their interaction with NILs. The most virulent isolate was XO-BLRP which was virulent on all the 11 lines having single BB resistance genes and it is also able to infect lines having two (xa13 + Xa21), three (Xa4 + xa5 + xa13), four (Xa4 + Xa7 + xa13 + Xa21) and five (Xa4+ xa5 + Xa7 + xa13+ Xa21) gene combinations. The next most virulent isolates were XO-BTP, XO-RPR and XO-SRP. The best gene combinations, so far identified are Xa4 + xa5, Xa4 + Xa21, xa5+ xa13+ Xa21 Xa4 + xa5+ Xa7, Xa4 + Xa7 + Xa21 and Xa4 + xa5 + xa13 + Xa21. None of the isolate was able to infect the plants with these genes combinations. These gene combinations can be used in further resistance breeding programs for development of varieties with durable resistance to bacterial blight along with higher yield potential.
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