Author(s):

Laxmi Singh and Prabharani Chaudhari

Abstract: Genetic stability is considered one of the most important genetic tests used to as certain the extent of genetic stability reached in plants; consequently, the goal of this research is to detect the degree of genetic stability of a group of a superior rice lines under different environments. Eighty rice genotypes including seven checks were subjected to pooled analysis of variance for four characters viz. days to 50% flowering, filled grains per panicle, spikelet fertility per panicle and grain yield per plant. The pooled analysis of variance indicated significant variation among the Environments, Genotypes and Genotype x Environment interaction for all the characters studied. It indicates that there is significant variation among genotypes, which can be further studied for their interaction with different environments to identify for their suitability for cultivation. Analysis of variance of stability parameters revealed that the mean squares due to genotypes were significant for all the characters. The mean sums of squares for Genotype × Environment interactions in pooled analysis were found significant for all the characters studied. This suggested that the genotypes under study had reacted differently to the environments for grain yield per plant and other yield related characters. Stability parameters indicated that the genotypes had high grain yield per plant were Dadhmaini Dhan, Barhasaal, RJR:II, Gangtai, Indira Barani Dhan 1 and Ajam Dhan were below average stable and Ganga Dhan was above average stable genotype, they are suitable for cultivation in poor or unfavourable and rich or favourable environments respectively. For days to 50% flowering, Kakai, Dhanbanko, Nagina 22, IR 42253 were below average stable, Lallu, Jhular and Lallu 14 and NPT 26 were above average stable and Barhi was average stable genotype, For filled grains per panicle IR-64, Bhejari, Gangtai and Bhatamokdo were below average stable, Nagina 22, Samleshwari and Indira Aerobic 1 were above average stable genotypes. For spikelet fertility Jodhari, IR-64 and Safri were below average stable, Nagina 22, Kadam phool, Indira Aerobic 1 and Samleshwari were above average stable and Bankadi was average stable genotype, they are suitable for cultivation in poor, rich and average (rich and poor both) environments respectively.

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