Integration of statistical and physiological analyses of adaptation of near-isogenic barley lines
1993
Romagosa, I. (Center UdL-lRTA, Lleida (Spain)) | Fox, P.N. | Garcia del Morall, L. F. | Ramos, J.M. | Garcia del Moral, B. | Roca de Togores, F. | Molina-Cano, J.L.
Seven near-isogenic barley lines, differing for three independent mutant genes, were grown in 15 environments in Spain. Genotype x environment interaction (G x E) for grain yield was examined with the Additive Main Effects and Multiplicative interaction (AMMI) model. The results of this statistical analysis of multilocation yield-data were compared with a morpho-physiological characterization of the lines at two sites. The first two principal component axes from the AMMI analysis were strongly associated with the morpho-physiological characters. The independent but parallel discrimination among genotypes reflects genetic differences and highlights the power of the AMMI analysis as a tool to investigate G x E. Characters which appear to be positively associated with yield in the germplasm under study could be identified for some environments.
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