Genetic Diversity in Common Bean Accessions Evaluated by Means of Morpho-Agronomical and SSR Data

Abstract

     The knowledge and understanding of genetic variability of common bean (Phaseolus vulgaris L.) germplasm is important for utilization and conservation. The objective of this study was to analyze genetic diversity of 60 accessions collected in Vietnam and from other countries. Morphological markers showed that 60 accessions were very diverse and they were divided into 7 groups with genetic similarity index of 0.17. Fifteen SSR markers among 20 used showed polymorphism with total of 69 alleles and an average of 4.6 alleles per locus. BM152 marker had highest PIC value (0.73). Four major clusters were grouped for 60 accessions with genetic similarity at 0.69. The dendrogram showing the genetic relationships was constructed by the unweighted pairedgroup method with arithmetic average (UPGMA) using the software NTSYS-pc 2.01. The results indicated that SSR analysis could be used for the estimation of genetic diversity among common bean accessions. That are useful for breeding purposes.