Resumo

TADEO-ROBLEDO, Margarita; ESPINOSA CALDERON, Alejandro; BECK, David  e  TORRES, José Luis. Seed yield of male sterile and normal fertiles progenitors of maize hybrids. Agric. Téc. Méx [online]. 2007, vol.33, n.2, pp.175-180. ISSN 0568-2517.

To reduce production costs maize seed multiplication, the use of male sterility is a viable option. Researchers at the National Research Institute for Forestry, Agriculture and Livestock (INIFAP) and the National Autonomous University of Mexico (UNAM), introduced a male sterile gene since 1992 have been pursuing the introduction of this that into maize lines and in the search for fertility restoring lines. The objective of this study was to evaluate seed production and quality of male sterile single crosses and to compare them with their fertile version. The experiment was established at El Batan, State of Mexico, Mexico and Tula, Hidalgo, in a complete randomized block design with three replicates. During the flowering period the sterility trait was visually verified. No difference in seed production was observed between male sterile and normal versions of the crosses. Male sterility increased the percentage of large seeds and in the majority of the crosses the 100 seed weight. The male sterility trait was confirmed on all simple crosses.

Palavras-chave : Zea mays L.; detasseling; days to flowering; seed production.

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