EVALUATION OR EARLY AND INTERMEDIATE CORN VARIETIES IN CENTRAL HIGH VALLEYS OF MEXICO .I. OUTSTANDING POPULATIONS

Abstract

Considering that to begin a program of genetic improvement of corn (Zea mays L.), it is essential select the germoplasmic sources of major genetic variability to generate alternatives that determine the direction of the program, the purpose of this investigation was
to use the genetic variability of some germoplasmic sources to begin a genetic improvement program 121 populations were sowed in Metepec, Tecamac, Montecillo and Chapingo of the state of Mexico in 1993, under a lattice simple duplicate design for locality. Analysis of variance were carried out for location and combined of days to male and female flowering and yield. Comparison of meams were made using the procedure by Tukey (p≤ 0.05), and the interaction genotype-environment was studied utilizing parameters of stability. The results showed highly significant differences among locations, varieties, varieties x locations and the interaction varieties x locations (lineal), permitting the selection of the best varieties: Mex-38, Mex-495, Mex-581, Landrace of Almoloya de Juarez, Landrace of Acambay, Landrace of Mezquital SM-14 drought, Landrace of Jiquipilco, Landrace of Santiago Yeche, Hgo-86, Mich-21, Compound of Wide Genetic Base, Population of Wide Genetic Base, Pue-502, Pue375, Pue-382 and Tlax-278, to begin a program of genetic improvement. Also, the following varieties were detected: Gto-124, Cafime SM-13 drought, Pue-449, Pue-501, Pue-522, Dgo159, Pue-451 and Hgo-80 for environments with restricted potential.