For mungbean and other pulse crops, qualitative traits particularly seed appearance such as color and luster are important breeding objectives since they are influenced by consumer preference. For example, cultivars with green hypocotyls are required by the bean sprouting industry as the consumers prefer them to the purple ones. Black mature pods can protect green seeds from discoloration while the plants are standing for harvesting in the field. Trichome density and length is believed to affect the preference of certain insect pests (Chiang and Talekar, 1980), but the hair itself can cause itchiness and rash to the farmers working in the field. Non-lodging mungbean is preferred, especially when machine harvesting is practiced. Tomooka et al. (1991) studied seed characters of 651 mungbean germplasms from several countries and found that germplasm with shiny green seed coat is the most prevailing type, followed by dull green, brown, black and yellow types. Based on Shanmugasundaram (1988), almost all mungbean cultivars released in India are green with dull or shiny seed coat, however, a few cultivars with yellow and black mottled seed coat also existed. Mungbean varieties in Southeast Asia and China normally have a shiny green seed coat, but never with black, brown or mottled ones. In Thailand, a local yellow-seeded mungbean was cultivated especially for making dessert and commanded high price in the past but is nearly extinct nowadays due to the lack of a market (Srinives and Yang, 1988).