GENOTYPE X ENVIRONMENT INTERACTION ANALYSIS BY MIXED MODELS IN BRAZILIAN COMMON BEAN INBRED LINES

摘要

Common bean (Phaseolus vulgaris L.) is the world's most important grain legume for direct human consumption. The Americas are the largest bean-producing region and Brazil the world's largest producer and consumer (Singh 1999). However, this crop is affected by several biological, edaphic, and climatic factors that decrease yield (Schwartz and Pastor-Corrales 1989). Genotypic selection methods for recommendation of new cultivars have been widely used in breeding programs to identify inbred lines that have wide yield adaptability and stability. The use of mixed models (REML/BLUP) allows a detailed study of genotype x environment interaction (G x E), and reduce the errors from the effects of this interaction. The objective of this study was to evaluate the yield adaptability and stability of 18 common bean cultivar/inbred lines in four distinct environments of Parana state, Brazil.