The ms male-sterile mutant is inherited as a recessive allele. Plants homozygous 1or ms4 are male-sterile; heterozygotes are completely male-fertile. Male-sterility in the ms4 system results from the absence of cytokinesis fol-lowing telophase II of microsporogenesis (Delannay and Palmer; 1982).
Graybosch, Robert and Palmer, R. G.
"Research Notes : United States : Is the ms4 male-sterile nrutant partially fertile?,"
Soybean Genetics Newsletter: Vol. 11
, Article 39.
Available at: http://lib.dr.iastate.edu/soybeangenetics/vol11/iss1/39