Department of Genetics and Plant Breeding, Banaras Hindu University, Varanasi-221 005
Twenty-two diverse and elite cultivars, seventeen of Triticum aestivum and five of Triticum durum, were investigated for their G × E interaction under seven environments (management practices) at one location. The main effects as well as both the components of G × E interaction (predictable and unpredictable) effect were significant for grain yield. The durum cultivars, though as stable as the dwarf hexaploid cultivars, may not be recommended to be grown under rich environments due to their low responsiveness. Within hexaploids, the tall cultivars were highly unstable and exhibited low population buffering. The double and single dwarfs, having high mean and average stability, were most desirable.
Two aspects of phenotype, mean performance and linear response, were positively significantly associated. However, some of the cultivars, viz., Raj 821, HD 2009, HD 4502 and K 68 exhibited high yield with low or zero regression. Kalyan Sona was most responsive to richer environments and HD 2009 showed widest adaptability, average stability and high productivity.
