PHENOTYPIC STABILITY FOR GRAIN YIELD AND ITS CONTRIBUTING CHARACTERS USING DIFFERENT STABILITY MODELS IN BREAD WHEAT (Triticum aestivum L. em. Thell.)1979
Loading...
Files
Date
2015-04
Authors
Journal Title
Journal ISSN
Volume Title
Publisher
JAU,JUNAGADH
Abstract
The genotype x environment interaction is of major concern in plant breeding programmes. Number of statistical methods have been developed to analyse G x E interaction and thereby to evaluate pbenotypic stability of genotypes. However, the literature on comparison of stability analysis model is very scanty. The present study was undertaken to compare some stability analysis models. For this purpose eighty genotype of bread wheat were evaluated at two different locations viz., Wheat Research Station and Krishi Vigyan Kendra, Khapat (Porbandar), Junagadh Agricultural University, Junagadh during the Rabi 2009-10 in a randomized complete block design with three replication. Four environments were created by sowing crop in two different dates of sowing at two locations i.e. Ei (normal sowing at Khapat), E2 (late sowing at Khapat), E3 (normal sowing at Junagadh), E4 (late sowing at Junagadh). The data on days to 50% flowering, days to maturity, plant height (cm), number of effective tillers per plant, peduncle length (cm), flag leaf area (cm^), length of main spike (cm), number of spikelets per spike, number of grains per spike, 1000-grain weight (g)ยป biological yield per plant (g), harvest index (%) and grain yield per plant (g) were recorded and analysed. Three stability analysis models proposed by Eberhart and Russell (1966), Perkins and Jinks (1968) and Freeman and Perkins (1971) were compared empirically for their efficiency. Additive main effects and multiplicative interaction (AMMI) analysis was also attempted in this study to evaluate 80 bread wheat genotypes established in four environments using grain yield data in order to determine the magnitude of G x E interaction and to identify stable and adaptable genotypes. Differential relative response to different genotypes to different enviromnents were observed for grain yield and other characters under study. The ranking of genotypes for grain yield per plant showed that none of the genotype had same rank in all the environments. The genotype MACS 2496, GW 322