Abstract

Four new double-cross hybrids and 16 triple-cross hybrids were evaluated and compared with triple-cross commercial hybrids H-135, A- 791, PUMA 1157 and PUMA 1159, and double-cross H-137, during the 1996 spring-summer season. The purpose was to offer new and better options to producers in the Bajio and Highland Transitional Zones in Mexico (1800-2200 m.a.s.l.). Analysis of variance showed highly significant statistical differences for almost all variables for which the genotype factor was studied, and non-significant differences for repetitions. Nine triple-cross hybrids yielded between 8 and 12 t/ha, a greater yield than that of the rest of the hybrids (double and triple crosses), and also greater than that of the controls. The triple-cross UHT96E410 hybrid stood out yielding 12,4 t/ha in 77 days between sowing and tasseling. The triple-cross control A-791 followed, yielding 8.6 t/ha in 99 days between sowing and tasseling; UHT96E410 grew up to 209 cm in height. Five of the controls showed heights of over 230 cm. These new hybrids stood out for their superior yield and favorable agronomic traits, offering farmers in the transitional zones of Mexico a broader variety of options.