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Pathotype characterization of Xanthomonas oryzae pv oryzae isolates ofWest Bengal and evaluation of resistance genes of bacterial blight of rice (Oryza sativa L.)

Pathotype characterization of Xanthomonas oryzae pv oryzae isolates ofWest Bengal and evaluation of resistance genes of bacterial blight of rice (Oryza sativa L.)

S. DEBNATH, 1P. SATYA AND B. C. SAHA Department of Genetics and Plant Breeding Uttar Banga Krishi Viswavidyalaya, Pundibari -736165, Cooch Behar, West Bengal 1Central Research Institute for Jute and Allied Fibre, Barrackpore, West Bengal

Journal Title:Journal of Crop and Weed
Abstract


Bacterial blight is the second most important disease of rice. Hence characterization of the pathotype that causes bacterial blight and identification of resistance genes were attempted as a preliminary step towards identifying some resistant sources. In order to do that, six isolates collected from different parts of West Bengal were screened against near isogenic lines to identify variability in virulence. All the NILs were found to possess varying degree of susceptibility to resistance against all the isolates with significant differences in disease progress. The pyramided lines showed broad spectra of resistance against all the Xoo isolates and most durable resistant monogenes were xa5, xa13 and Xa21.

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