Stability analysis for yield and its components of rice landraces under dry direct seeded rice cultivation

Abstract

In order to study the stability performance of fifteen rice landraces, the experiment was conducted in five consecutive years from 2015-16 to 2019-20 in rabi season at Agricultural Research Station, Paramakudi, Tamil Nadu. Data was subjected to the combined analysis of variance, results indicated that the availability of wider genetic variation and the genetic behavior of the genes influencing the characters such as days to 50% flowering, plant height, panicle length, spikelet fertility and grain yield gives enough opportunity for the improvement of these traits by following conventional plant breeding methods. The GXE (linear) was highly significant for all the traits considered. This implies that the genotypes varied in linear response to the environments and hence the behaviour of the genotypes could be predicted over environments more accurately. Based on stability parameters and mean, the landrace, G8 (Kallurundaikar), has high mean yield with stable performance over five years being the overall best can be considered for the direct seeded rice cultivation in the rainfed ecosystem.