Vol. 12, Issue 5 (2023)

Author(s):
Supratim Sadhu, Lakshmi Hijam, Rupsanatan Mandal, Moumita Chakraborty, Anjan Roy, Rakesh Barai and Suvendu Kumar Roy

Abstract:
Rice is known as the "Global Grain" and considered as staple food due to its widespread production and consumption throughout the world. In order to assess the genetic diversity, the present experiment was conducted with 52 rice genotypes for eight morphological characters related to the yield in the Kharif season (2021). Statistical analysis was carried out for the estimation of the genotypic coefficient of variation (GCV), phenotypic coefficient of variation (PCV), heritability (BS), and genetic advance as percentage of mean for all the characters. Among all the characters, the highest GCV and PCV values were found in the character yield per plant (30.97% and 29.82%), harvest index (21.83% and 20.45%), number of effective tillers per plant (21.81% and 21.09%) and all the characters had the high heritability while the characters yield per plant (59.14%), the number of effective tillers per plant (42.04%), 1000 grain weight (40.10%), number of grains per panicle (39.62%), harvest index (39.47% had the highest genetic advance in percent mean coupled with high heritability. So, these characters were governed by additive gene action. Correlation studies showed that the character yieldper plant had the significant positive correlation with days to 50% flowering (0.291), number of effective tillersper plant (0.373), number of grainsper panicle (0.326) and harvest index (0.789). The path analysis revealed thatthe character harvest index (0.767) had the highest direct effect followed by the characters number of effective tillersper plant (0.305), days to 50% flowering (0.284), number of grainsper panicle (0.125) and these characters were positively associated with yieldper plant. So, these characters could be considered for selection.