Genotype-environment interaction and stability analysis of four fine rice varieties

A K Patwary,P L Biswas,S Ghosal,U K Nath

doi:10.3329/jbau.v10i1.12011

Abstract

Genotype-environment interactions through different stability parameters and performance traits of four fine rice genotypes were studied. The traits were; days to 50% flowering, days to maturity, plant height (cm), number of effective tillers per hill, panicle length (cm), number of fertile grains per panicle, number of sterile grains per panicle and yield (t/ha) in four fine rice genotypes across nine environments along with experimental farm of Genetics and Plant Breeding department, Bangladesh Agricultural University (BAU) Mymensingh. Significant differences were observed for genotypes, environments and genotypesenvironment interaction. Stability analysis after Eberhat and Russells model suggested that the genotypes used in study were more or less responsive to environmental changes. Most of the genotypes performed better in Comilla. BAU125 was found stable for effective tillers per hill and comparatively less sensitive to other genotypes in panicle length and number of sterile grains per panicle. BR5 was stable for days to maturity and plant height whereas Kalizira performed better than other genotypes for fertile grains per panicle. In general, only the genotype BAU125 was found stable for effective tillers per hill, panicle length and lowest number of sterile grains per panicle. DOI: http://dx.doi.org/10.3329/jbau.v10i1.12011 J. Bangladesh Agril. Univ. 10(1): 17, 2012

Highlights

Rice feeds more than half of world population
Genotypes which can adjust its phenotypic state in response to environmental fluctuations in such a way that it gives maximum stable economic return can be termed as well “buffered” or stable (Allard and Bardshaw,1964).In plant breeding programme, potential genotypes are usually evaluated in different environments before selecting desirable ones
The genotype-environment interaction when tested against pooled error was found significant for all the characters, indicating that all the traits were highly influenced by the change in environments leading to extension of analysis for estimating stability parameters

Summary

Introduction

Rice feeds more than half of world population. The demand of fine rice is always high it possesses lower yield potentiality than HYV (High Yielding Variety). Analysis of stability parameters of individual genotypes indicated that three genotypes (BAU125, Kalizira and Kataribhog) out of four showed combine bi and s2di sensitivity suggesting either linear or non-linear component alone or their cumulative effects were responsible for significant genotype-environment interaction.

Results

Conclusion