COMPORTAMIENTO DE HÍBRIDOS DE MAÍZ CON ALTA CALIDAD DE PROTEÍNA, POR SU BUEN RENDIMIENTO Y TOLERANCIA AL "ACHAPARRAMIENTO".

The objectives of this research were to determine the yield and agronomic characteristics of Quality Protein Maize (QPM) hybrids, and to identify those well adapted and tolerant to corn stunt disease. Thus, during the spring summer season in 2005, there were carried out three experiments of QPM hybrids at Medellín de Bravo, Tlalixcoyan and Ignacio de la Llave in Veracruz, México. The QPM hybrid trials were planted under a 9 × 2 alpha lattice design with 18 entries and three replications, in plots of two rows 5 m long and 80 cm wide, and 62,500 plants/ha. Data were taken in each two-row plots, included grain yield, percentage of damaged plants and ears for corn stunt, severity of damage, plant and ear height, days to pollen shed and silk emergence, plant and ear aspect, percentage of lodging, percentage of ears with bad husk cover and carrot. From the combined analysis, the variation for grain yield, percentage of damaged plants and ears for corn stunt and severity was highly significant differences for hybrids (H) and locations (L). The interaction HxL was significant for all traits, except for grain yield. The QPM hybrids that registered the best yield, agronomic characteristics and tolerance to corn stunt were: (CML264Qx CML150)xCML491, (CML264QxCML273Q)xCML491, (CML144xCML159)xCLQ-RCWQ50, (CML492 x CML150)x CLQ-RCWQ50. [ABSTRACT FROM AUTHOR]