Abstract
A genic male sterile mutant was found in the wild beet, Bata maritima L. Its causal gene was designated as ms and is different from the gene a1 which was previously reported in sugar beets. The gene ms has an independent relationship with the genes X and Z which manifest their restoration effect with a plasmagene S for male sterility. Though an association between the pollen abortion and the tapetum abnormality in this male sterility existed, the growth of the plasmodium was not so pronounced when compared with that of the cytoplasmic-genetic male sterility.
