GENOTYPE-ENVIRONMENT INTERACTION IN SPRING WHEAT (Triticuin spp.)

Abstract

A field experiment was conducted at the farm of Sher-e-Bangla Agricultural University, Dhaka, Bangladesh with ten (nine Triticurn aeslivurn and one Triticum turgidum) wheat genotypes planted at three different dates during November 2012 to March 2013 to select stable genotype(s) suitable for varying planting dates and to compare the average performance of the genotypes in different environments. Significant genotype x environment interaction exhibited for all the characters studied. Analysis of variance for the genotypes showed significant variation which revealed the presence of considerable amount of genetic variability among different genotypes. Significant genotypes x environment interactions were observed when tested agaiist pooled error. Environment + (genotype x environment) component and genotype x environment (linear) component also showed significant variation and the genotypes performed differently in different environments. Except pooled deviation linear components of genotype-environment interaction were significant for all the characters. So the differences in stability for different characters were due to the linear response and not for non-linear firnetion. Considering all the characters, genotypes 64. 66, 69 performed better in overall environments. 010 performed better in poor condition whereas 67 performed better in favorable environment. Among three different sowing dates, optimum sowing (sowing at 20 November, 2012) performed better for most of the genotypes and gradually decreased with late sowing. ft