Determination of morphological variability of different pisum genotypes using principal component analysis

Abstract

The aim of the study was to evaluate the variation among some Pisum genotypes using principal component analysis technique. The plant material covering wild pea accessions (Pisum fulvum L., P. abyssinicum L., P. sativum var. elatius), local varieties (P. sativum var. sativum L. and P. sativum var. arvense L.) and two commercial varieties were evaluated for 50 morphological traits. According to results, the first eleven principal component with Eigenvalues >1 contributed % 96.95 of the variability. The percentages of cumulative variation accounted for by each of the four principal component are 33.14%, 48.72%, 58.65%, and 66.88% respectively. Based on the principal coordinate analysis, five major groups were formed. In general, the diagram represented an obvious division between taxonomic groups except for P. sativum var. sativum and P. sativum var. arvense accessions.