AMMI and GGE biplot analysis of yield of different elite wheat line under terminal heat stress and irrigated environments

Abstract Wheat crop contributes to a major portion of the agriculture economy Nepal. It is ranked as third cereal country even though, it faces terminal heat stress which speeds up grain filling rate and shortens period, causing reduction in weight, size, number quality losses. We can minimize this loss through genotypic selection high-yielding lines by understanding genotype-environment interaction. The objective research obtain high yielding line with stable performance across environments. In order do so, we conducted an experiment using eighteen elite wheat two check varieties alpha-lattice design replications different environments viz. irrigated environment from November 2019 April 2020. analysis variance revealed that genotype, their interaction had highly significant effect on yield. Furthermore, which-won–where model indicated specific adaptation NL 1179, 1420, BL 4407, 1368 Bhirkuti heat-stressed environment. Similarly, mean-versus-stability study 1368, 4919, 1350, 1420 above-average yield higher stability whereas Gautam, 1412, 1376, 1387, 1404, 1381 below-average lower stability. ranking biplot, PC1 explaining 73.6% PC2 26.4% effect, showed rank line, > 1368> 1350 other lines, close ideal line. On basis obtained results, recommend both suited environments, while 1179 adapted specifically for environment, respectively.