Diversity Analysis and Core Subset Establishment of Hyacinth Bean Collection in Bangladesh

Considering current and future climate possible variations Screening of resistant germplasm is fundamental for continuous and sustainable production. Plant Genetic Resource Centre, Bangladesh Agricultural Research Institute, Gazipur, Bangladesh, maintained 484 hyacinth bean (Lablab purpureus L.) accessions. Considering a core collection strategy, the accessions were stratified into two groups based on vine colors: green and purple. The maximum genotypes of the collection were of green vine. Each of the two subgroups was divided into three groups according to colors of pod i.e., green, white and red. Each group again divided itself into two according to beak position as central and marginal of pod. Strategically, a core subset consisting of 36 accessions out of 484 accessions was determined. Analysis of these 36 accessions showed a distribution of vine colors, flower and pod colors, pod curvature and beak position on pod with substantial variation in the collection. Shannon Diversity Index also revealed high phenotypic diversity in vine and pod characters. High diversities were found for pod curvature and beak position. They were estimated in quantitative characters of inflorescence and pod characters. Diversity Indices of different characters of the core accessions were of equal or higher magnitudes to the respective characters of the base collection indicating the better representation of the core to the original collection.