The present investigation was undertaken with 107 elite rice genotypes to study the variability, heritability and genetic advance as per cent of mean for yield and yield component traits. In addition, character association between the yield and yield components and their direct and indirect effects on grain yield were also studied. High PCV and GCV were recorded for ear bearing tillers per plant, while high heritability were recorded for all the traits studied. Further, the high genetic advance as per cent of mean was recorded for plant height, the number of ear bearing tillers per plant, the total number of grains per panicle, test weight and grain yield per plant. Among these, ear bearing tillers per plant had recorded a high variability, heritability and genetic advance as per cent of mean in addition to correlation and direct effects with grain yield per plant indicating its effectiveness as important selection criterion for the yield improvement.
Rice is the most widely grown crop in the world, feeding half of the world’s population. Brown plant hopper (BPH) is a considerable risk to rice fields carrying 20-90% yield losses. Hopper burn can be effectively managed by the recognition and use of BPH genes. Marker based genetic analysis of 136 RILcollected from a high yielding susceptible variety, MTU 3626 and BM 71, a BPH donor developed at RARS, identified 3 minor novel QTLs viz; qmbph2.1,qmbph4.1 and qmbph12.1 on chromosomes 2, 4 and 12 and two other QTLson chromosome 5 and 7, namelyqmbph5.1 and qmbph7.1. The phenotyping of RIL’s revealed that ten RIL’s (2711 – 31, 2711 – 37, 2711 – 50, 2711 – 69, 2711 – 84, 2711 – 88, 2711 – 94, 2711 – 100, 2711 – 168 and 2711 – 191) recorded yields comparable to checks, Swarna and Pushyami along with BPH score similar to donor. The BPH resistance lines recognised will be further evaluated, and the confirmed lines can be employed in rice breeding programs.
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