Vol. 11, Issue 9 (2022)

Author(s):
Suraj Ningombam, AP Agarwal, Thokchom Renuka Devi, DJ Sharma, Dinesh Pandey and NK Chaure

Abstract:
The present experiment was conducted at experimental field of Department of Genetics and Plant Breeding, College of Agriculture, Central Agricultural University, Imphal during kharif, 2021 to study the extent of genetic variability, heritability and genetic advance in fifty rice genotypes along with five checks for fifteen yield traits under upland condition. The analysis of variance showed highly significant variations among all the genotypes for all the yield and its contributing traits, showing the presence of significant amount of variance. Proline content, grain yield per plant, number of unfilled grains per panicle, flag leaf length and plant height showed high estimates of phenotypic and genotypic coefficient of variation. This suggests that direct selection for these traits will result in genetic improvement. High board sense heritability estimates are observed for character days to 50% flowering, days to maturity, plant height, culm diameter, flag leaf length, panicle length, number of filled grains per panicle, number of unfilled grains per plant, grain yield, 1000 grain weight, proline content, biological yield and harvest index. High heritability coupled with high genetic advance as percent mean were observed for grain yield per plant, plant height, number of filled grains per panicle, number of unfilled grains per panicle, flag leaf length, culm thickness, biological yield and harvest index. This indicates that additive gene action influenced the inheritance of these traits, thus providing scope for further improvement through selection.