Effect of genotype × environment interaction on grain yield factors in durum wheat

Abstract

Identifying environment-specific and widely adapted genotypes is necessary through understanding of environmental interaction (GEI). To estimate the enormousness of genotype (G), environment (E) and GEI results on yield and yield components and it is necessary to conduct multi-locations trials of durum wheat. During the year 2019/20 cropping season eleven (11) durum wheat genotypes were appraised under three locations within Balochistan, Pakistan. Almost all traits exhibit significant results for combined analyses of variance for genotypes (G) and Genotype X Environmental Interaction (GEI), the results of the genotypes were not uniform transversely the locations shows strong effect of environments. Commonly, out of total variation, GEI explicated chief share of deviation and thus had greater effect than genotypes (G) and environment (E) on the countenance of makeup for all characters. Mean value of three environments indicates that the genotype/line (G-9) produced supreme value for grain yield (4682.4 Kg ha-1) and harvest index (34.66%), signifying it as reputable their exact malleability in corresponding environments. Among environments, E-02 was acknowledged as exceedingly fruitful environments in relations of grain yield. High yielding and widely adaptable genotype thus seemed as principal genotype/line for supreme of the production traits. Likewise, in all three environments G-9 had produced higher grain yield excluding E-03. Analysis of correlation exposed momentous positive link of grain yield with plant density m-2 (rg = 0.40*), biological yield (rg = 0.39*) and harvest index (rg = 0.82*). The genotype/line G-9 was originated as extraordinary yielding genotype/line and consequently could be suggested for commercialization in Balochistan.