The native maize of Tamaulipas develops in different conditions of environmental stress, which allow the incidence of Spodoptera frugiperda. Precocity can be considered as a selection criterion related to tolerance to S. frugiperda damage. Therefore, the objective of the research was to evaluate the genetic effects of the flowering of native maize cultivars. The experiment was established in two agricultural cycles OI 2019-2020 and PV 2020, in Güé;mez, Tamaulipas; In a randomized block design with divided plots arrangement, the large plot was the combination of treatments-cycle and the small the maize populations. The variable to be evaluated was the male flowering, which was determined by counting the days from the sowing date until 50% of plants with pollen release were observed in each experimental plot. It was observed that there were significant genetic effects of specific combining ability, reciprocal effects, which were due to maternal effects. From what is shown, there was an influence of the female parent on the expression of the days to male flowering. The precocity observed in the crosses TML3S3 × VHA and Cam × VHA shows cytoplasmic inheritance.

Key words:male flowering, precocity, genetic effects, diallel.