Genotype X Environment Interaction in Grain Sorghum Hybrids

Genotype x location x year interactions indicated that the first order interaction g X l and the second order interaction g x l X y are highly significant whereas the g X y interaction was non-significant. These studies further pointed out that sorghum could be bred for few large maturity zones rather than several small regions limited by state and geographic barriers. The implications of genotype-environment interactions in the development of testing procedures have been discussed.