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 |
A major issue in rice production is the control of Magnaporthe oryzae, the causal agent of rice blast. K 343 being a well adapted variety in the hill zone of Jammu and Kashmir region is susceptible to blast. Present study was undertaken to introgress the broad spectrum resistance gene Pi9 through marker assisted backcross breeding in order to avoid the losses due to this fungus. Foreground selection Pi9 gene in BC2F1 (K 343*3/RML 22) population with marker AP5930 identified 30 target gene positive plants. Background selection for analysis of recurrent parent genome in target gene positive plant using genome wide polymorphic SSR markers led to identification of three plants three plants (P3, P11, P28) in BC2F1 which had recurrent parent genome recovery more than 85 percent. These plants exhibited broader similarity with recurrent parent with respect to agro-morphological traits and resistant to highly resistant reaction to PLP-1 strain of rice blast fungus M. oryzae. It indicates the effectiveness of resistance provided Pi9 gene. These plants would serve as genetic stocks for development of blast resistant lines/varieties or donor for development of blast resistant varieties.
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