Resumo

CANALES ISLAS, Enrique Inoscencio et al. Grain yield stability in trilinear male sterile corn hybrids for Valles Altos de Mexico. Rev. Mex. Cienc. Agríc [online]. 2016, vol.7, n.8, pp.1815-1827. ISSN 2007-0934.

At the Facultad de Estudios Superiores Cuautitlán (FESCUNAM) and the Instituto Nacional de Investigaciones Forestales, Agricolas y Pecuarias (INIFAP-CEVAMEX), has trilinear maize hybrid (Zea mays L.), whose single crosses parent possess male sterility to facilitate seed production, maintain their genetic quality and reduce seed production costs. Prior to commercial release of the hybrids for its extensive use, it is required to identify the best genotypes, based on yield and stability under different environments. The aim of this study was to identify trilinear corn hybrids grain yield stability, using Eberhart and Russell stability parameters and the additive main effect and multiplicative interaction (AMMI) model, thus to define the model that best describes the interaction genotype per environment. Four sterile and fertile male trilinear hybrids were evaluated in experiments established with one irrigatio in two locations in springsummer 2012, and in each of two planting dates and two population densities, eight test environments, combining locality x planting date x population densities were formed. AMMI identified as stable the trilinear hybrids H-57 and Puma 1183 AEC2, while the stability parameters model identified hybrids H-53, Puma 1183 AEC1 and Puma 1183 AEC2 as stable for their regression coefficients close to unit and regression of deviations close to zero. The levels of correspondence between the two models were 50% for hybrids. It is concluded that both models identified at least a trilinear hybrid as stable, but it was the AMMI model that best described the interaction genotype x environment.

Palavras-chave : Zea mays; adaptability; male sterility; productivity; seed production; single crosses; stability; yield.

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