تجزيه و تحليل چندمتغيره جهت بررسي تنوع ژنتيكي خصوصيات مرفولوژيك ژنوتيپ هاي لوبيا

Multivariate analysis of morphological traits of common bean genotypes (Phaseolus vulgaris L.)(Lima.red and pinto beans)

In order to investigate the genetic of morphological traits in 121 genotypes of lime, red and pinto beans. and grouping of genotypes for use in plant breeding, and experiment was conducted as a simple latice design at the Research Station of Agriculture College of Isfahan University of Technology, in 1997. High variability was observed among genotyps for all the studied characters. The phenotypic coefficiencts of variability were greater than the genotypic ones. for all the traits. Cluster analysis on the basis of quantitative traits detected 7 groups and identified that genotypes of lima, red and pinto beans were not greatly differ so that they were distributed in all the groups. Analysis of variance revealed a highly significant differences between clusters for all the characters studied_ Genotypes of group 7 had the highest yield and mid-maturity date. The genotypes of groups 1 and 6 bacause of having maximum dissimilarity, were distinguished suitable for crossing in order to make use of more variability. The first two canonical variables which justified 82.2 percent of the variation, demonstrated that day to maturity, main stem length, lenght of lateral branches and number of nodes in the main stern and lateralbranches had a considerable contribution to the discrepencies among groups. Principal components analysis was performed for all of the genotypes and separately for lima, red, pinto, determinate and indeterminate genotypes showed that in all of them 4 components justified more than 78.4 percent of the total variation. but different traits contributed differently to each principal component.