Agronomic potential and genetic divergence among genotypes of bush snap bean

Abstract

The aim of this study was to evaluate 11 breeding lines and three bush snap bean cultivars related to genetic divergence and agronomic potential in Londrina and Cambé, Paraná, Brazil. The experimental design was a randomized complete block with three replications. Each plot was represented by four rows of 4.0m long with 0.5m between rows. Eight characters were evaluated and submitted to individual and joint analysis of variance and multivariate analysis. There were statistical differences among genotypes for all the studied characteristics. The interaction genotype x local was not significant for production and pod diameter, showing a consistent performance of these characteristics and genotypes at these locations. The genetic divergence observed among genotypes was quantified within the first three principal components and the first three canonical variables that explained 90.2% and 88.7% of the total variation available, respectively. The morphologic characteristics and the seed production were within the first and second components and the snap bean production characteristics were within the third principal component. Five and seven groups of dissimilarity were defined of the principal components and canonical variables, respectively. The cultivars were represented in different groups. The most promising lines HAB 402, HAB 415, HAB 417 belong to the same group and are dissimilar in relation to the tested cultivars.