Morphological Variation and Phenetic Relationship of Hyacinth Bean (Lablab purpureus (L.) Sweet) in Lombok, West Nusa Tenggara

Hyacinth bean (Lablab purpureus (L.) Sweet) is a member of Fabaceae which has high economic potential but is still treated as an underutilized crop. Research on hyacinth bean in Indonesia so far is only focused on bio-chemical content and protein isolate. However, the study on morphological characters of hyacinth bean has never been conducted. The aimed of this research was to study morphological variation and the phenetic relationship of hyacinth bean germplasm (Lablab purpureus (L.) Sweet) in Lombok, West Nusa Tenggara. The research was conducted in 4 regencies (East Lombok, Central Lombok, West Lombok and North Lombok) and samples (stem, leaf, flower, fruit, and seed) were collected using exploration method.The result showed that based on the morphological characters, the 26 collected samples showed that there were morphological differences on stem color, pod morphology (color, edge, texture), and seed morphology (color, shape, and spot existence). Furthermore, phenetic relationship of 26 OTU’s (Operational Taxonomy Unit) based on 78 morphological characters showed that the hyacinth bean was divided into 2 large groups. The groups was differentiated by pod color. Group I had white or green pod with light or dark green edge while group II had white pod with purple edge. Member of group II was a dominant germplasm of hyacinth bean. Keywords: hyacinth bean, morphological variation, phenetic relationship, Lombo