Vigor híbrido, capacidad combinatoria y acción génica en un cruzamiento dialelo de cinco genotipos de trigo de primavera (Triticum aestivum L.) para porcentaje de proteína y rendimiento proteico

Abstract

Five cultivars of spring wheat (Triticum aestivum L.) were crossed in a diallel system to estimate hybrid vigor, combining ability and types of genetic effects for frrotein content and protein yield. F; hybrids produced a lower protein content than the midparental and higher parent value; contrastingly, a large amount of hybrid vigor existed for protein yield in the F1 generation. The analysis for general combining ability indicated that a large part of the total genetic variation observed for protein content was associated with genes wich were additive in their effects. Genetic variation in protein yield appeared to be controlled largely by nonadditive gene action. Jinks and Hayman's graphic analysis demostrated partial dominance for protein content and overdominance for protein yield. The relationship between protein and protein yield was not significant, but tended to be positive.