Vol. 10, Issue 12 (2021)

Author(s):
Anjali Singh and OP Verma

Abstract:
Genetic variation, heritability and genetic advance were studied in rice during Kharif 2019-20 at Main Experiment Station (E1) with pH-9.5 and Agronomy Farm (E2) with pH-8.3 in randomized complete block design at Acharya Narendra Deva University of Agriculture and Technology, Kumarganj, Ayodhya (U.P.). The present study was conducted with the objective of assessing the presence of genetic variability in seventy three diverse genotypes with three different checks (Sarjoo-52, Pusa-44 and NDU-3) at two different locations. A collection of genotypes were evaluated for quantitative characters viz., days to 50% flowering, productive tiller per plants, panicle length (cm), fertile spikelet per panicle, spikelet fertility (%), biological yield per plants (g), harvest index (%), L/B ratio, 1000-grain weight (g) and grain yield per plant (g). Analysis of variance revealed highly significant differences among all the genotypes for all traits. Genotypic efficient of variation (GCV) and phenotypic coefficient of variation (PCV) indicated the presence of considerable amount variability in all the traits. Phenotypic coefficient of variability was higher than genotypic coefficient of variability at both the locations i.e., Main Experiment Station (E1) and Agronomy Farm (E2). A perusal of coefficient of variability indicated that PCV and GCV were quiet high for biological yield per plant, productive tillers per plant and grain yield per plant and moderate for fertile spikelet per panicle, harvest index and L/B ratio while lowest for days to 50% flowering, panicle length and spikelet fertility at two different sodicity levels. A high estimate of heritability was found for all parameters at Main Experiment Station and Agronomy Farm. The presence of high heritability and high genetic advance in most of the traits indicated the presence of additive gene action. So, these traits can be improved through direct selection. The high broad sense heritability with moderate genetic advance in percent of mean were observed for days to 50% flowering, panicle length, spikelet fertility and 1000-grain weight indicating the presence of non-additive gene action suggesting heterosis breeding may be useful for the improvement of these traits. The overall results indicated the presence of enough variability for development of improved rice varieties and the studied traits can be used for selection.