Genotype environment interaction in dry matter production of awnless forage barleys

Abstract

Objective: To analyze the genotype environment interaction (GEI) in the dry forage production of 24 lines of awnless barley and commercial checks of the same and other species, through five environments.

 Design/methodology/approach: A randomly complete block design with three replications was used in the five environments evaluated, forage harvest was done at 105 days after sowing. The data were analyzed as combined randomly blocks over environmentss and the (GEI) was analyzed using the AMMI model.

Results: Significative differences (p? 0.01) were detected in the main effects and the GEI. According to AMMI analysis, genotypes G26 (Cerro prieto), G27 (Gabyan95), G10, G3, G19 and even genotype G24, showed near-zero interactions, so they were considered stable, while awnless barley lines: G6, G1 and G2 were rated as desirable for dry forage production base don their superiority over the overall mean and its low IGA.

Limitations on study/implications: Results may to vary if different environments and genotypes are considered.

Findings/conclusions: Threre are stable and desirable awnless barley genotypes that represents an excellent option for forage production in the studied región. The oat check was considered the least productive and Zaragoza, Coahuila, location is considered a potential environment for the production of dry forage using awnless forage barley as those evaluated in this study, in addition this environment exhibited adequate discriminatory power.

Key words: Awnless barley, dry forage, genotype environment interaction, AMMI model.