Singh et al. (1974) reported the inheritance as well as the pollen behaviour of 3 male-sterile lines of soybean , viz: 'Semmes M.S.1' , 'Semmes M.S.2' and 'N 69-2774'. They observed monogenic inheritance with sterility being the recessive trait in all these lines. Semmes M.S.1 had nonfunctional pollen but of the same size as that of normal pollen grains; Semmes M.S.2 had no pollen at all, whereas N 69-2774 had nonfunctional pollen but these were much bigger as compared to the normal pollen grains.