In spite of several thousands of diverse mungbean accessions having been collected, only a few have been chosen and repeatedly employed in cultivar development programs. AVRDC used to carry one of the most effective mungbean breeding programs in the world. At the center, the Philippine and Indian germplasms occupied respectively 57.44% and 38.22% of the breeding gene pool used in the programs (Fernandez and Shanmugasundaram, 1988 and Tays, 1993). Thus only a small portion of genetic variability has been exploited in genetic improvement of this crop. The germplasm from India was a prime source for resistance to diseases and insect pests, while that from the Philippines was utilized for improvement of yield potential (Tays, 1993 and Srinives, 1998). Although West Asian mungbean have high diversity, they are very scarcely employed in cultivar development/breeding programs. As indicated by Shanmugasundaram (1988), only one accession from this region was present in a pedigree of mungbean cultivars released around the world. Considering the high genetic diversity in the germplasm of West Asia, they should be exploited more in cultivar development to broaden the genetic base of this crop.