Pollen grain shape and size, exine sculpture and internal structure as revealed by scanning electron microscopy of pollen from diverse sorghum cytoplasmic-genetic male sterile and their maintainer lines showed distinct differences VZM2 pollen showed resemblence to GI pollen but differed from both CK 60 and M 35-1 pollen. CK60 pollen exine sculpture showed differences from that of M35-1 pollen. The pollen from make sterile exine lines were more or less devoid of protein and starch particles, The grouping of sorghum lines based on pollen structure corresonds to the grouping based on genetic and biochemical studies.
