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Evaluation of indica X japonica rice genotypes for yield and leaf blast disease resistance

Evaluation of indica X japonica rice genotypes for yield and leaf blast disease resistance

Crop Research (Hisar) 18(1): 74-78, July

Rice grain yield is the most important quantitative trait that directly controls the economic returns to farmers. Leaf blast disease is one of the devastating diseases that causes drastic reduction in yield. In this study, Doubled Haploid (DH) population of IR 64 X Azucena cross was evaluated for grain yield and blast disease reaction at RRS, Mandya and ARS, Ponnampet, respectively. Grain yield showed significant variability in the whole set of DH lines. Five DH lines and IR 64 showed highest range of 33.10-40.50 g grain yield per plant. Ninety-five DH lines, Azucena, IR 50 and HR 12 exhibited severe blast symptoms during October 1996. Indica parent IR 64 showed moderate to high resistance to blast disease during 1995-96. Few genotypes, P 057, P 116 and P 130 were identified which exhibited both higher grain yield and disease resistance. Since these genotypes are already in homozygous genetic background they are extremely useful as breeding material.

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Accession: 010616363

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