Abstract

RODRIGUEZ PEREZ, Gilberto et al. Comparison of two types of selection in populations of native corn. Rev. Mex. Cienc. Agríc [online]. 2013, vol.4, n.4, pp.611-623. ISSN 2007-0934.

The aims of this study were to estimate, in two native corn populations, selection indexes of agronomic characters that allow to identify corn families superior in yield and to compare two relative efficiencies of the predicted response expected. We evaluated 169 full-sib corn families under irrigation of the "Liebre" subpopulations number "10" and "37", in the experimental field of the Faculty of Agronomy of the UANL. The experimental design was a 13 x 13 lattice; the determined variables were grain yield, plant height, cob height, days to male and female flowering, cob length, cob diameter and number of rows per cob. Greater genetic gain was obtained by combining four characters correlated with yield. The most efficient selection indexes were those which considered the days to male flowering, plant height, cob height, cob length, cob diameter, and grain yield.

Keywords : corn; genetic correlation; grain yield; phenotypic correlation; relative efficiency.