Vol. 6, Issue 4 (2017)
Studies on genetic variability and heritability for quantitative characters in rice (Oryza sativa L.) under sodic soil
Author(s): Priyanka Rajpoot, PK Singh, OP Verma and Neeta Tripathi
Abstract: A field experiment was conducted during wet season 2015 at the GPB Farm of N.D. University of Agriculture and Technology, Faizabad. The experimental materials of rice for this investigation comprised of 20 genotypes as lines (females) and three testers (males) Narendra 5026, jaya and Sarjoo 52. Each of three testers was crossed with 20 lines during kharif 2014. Thus, total number of 60 hybrids (F1) were obtained. The total set of eighty five genotypes were grown during kharif in 2015 and evaluated along with their parents and two check varieties (Narendra Usar 3 and IR28) in Randomized complete block design with three replications crosses obtained through crossing in a “line × tester” mating design. Besides these, two checks viz; Narendra Usar 3 and IR28 a rice hybrid were also included for standard heterosis. The experiment was conducted at pH = 9.2, EC =2.21 dSm-1 and ESP 45%. The analysis variance revealed that all the treatments, parents, parent vs crosses, crosses, lines and testers were highly significant for majority of the yield and its contributing traits indicating wide genetic variability among the materials under study. Results revealed that there was least differences of estimates of the PCV and GCV. The estimates of PCV were higher than GCV for all the traits indicating that they all interacted with the environment to some extent. Besides, high estimates of phenotypic and genotypic coefficient of variation were estimated for grains yield per plant. High estimates of broad sense heritability was recorded for the characters viz., days to 50% flowering, plant height, flag leaf area, panicle bearing tillers per plant, spikelets per panicle, grains per panicle, spikelet fertility (%), 1000 -grain weight, biological yield per plant, L:B ratio, grains yield per plant. High heritability ( broad sense) coupled with high genetic advance in per cent of mean were observed for the characters like grain yield per plant, biological yield per plant, grains per panicle, panicle bearing tillers per plant, spikelets per panicle, L:B ratio and flag leaf area indicating the involvement additive gene action. The moderate narrow sense heritability with low genetic advance in per cent of mean were observed for spikelet fertility and 1000-grain weight indicating presence of non- additive gene action suggesting heterosis breeding may be useful.
How to cite this article:
Priyanka Rajpoot, PK Singh, OP Verma and Neeta Tripathi. Studies on genetic variability and heritability for quantitative characters in rice (Oryza sativa L.) under sodic soil. Journal of Pharmacognosy and Phytochemistry. 2017; 6(4): 1162-1165.