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 |
Bacterial blight (BB) is a major disease of rice for which host resistance is the only effective solution. Pyramiding entails stacking multiple genes leading to the simultaneous expression of more than one gene in a variety to develop durable resistance Expression. Gene pyramiding is gaining considerable importance as it would improve the efficiency of plant breeding leading to the development of genetic stocks and precise development of broad spectrum resistance capabilities. The success of gene pyramiding depends upon several critical factors, including the number of genes to be transferred, the distance between the target genes and flanking markers, the number of genotype selected in each breeding generation, the nature of germplasm etc. The two genes pyramid Xa4+Xa7, Xa7+Xa21 is recently the most utilized combination for developing resistant varieties through marker-assisted breeding. Our study was carried out to elicit the detailed response of forty lines possessing these two genes in genetic of Mahamaya background to isolate of Chhattisgarh. The overall results confirmed that genetic background plays crucial role for the effective expression of Xa4+Xa7, Xa7+Xa21 combination.
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