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Inheritance of Partial Male Fertility in Maize in the Presence of Texas Sterile Cytoplasm¹

In tests involving 4 partial pollen fertility restoring maize inbreds, 13 chromosome marker lines, and Texas sterile cytoplasm, chi-square tests for association of male fertility and marker genes were run on 30 families, and significant or highly significant association was found for 2 of the inbreds. When M14 was used, genes affecting partial restoration were indicated on chromosomes 2 (2 loci), 3, 7, and 9. For K64, similar genes were indicated on chromosome 2 (2 loci), 3 (2 loci), 4, 7, and 10.

These tests indicate that partial restoration of cytoplasmically male-sterile maize depends on the action of genes located on several chromosomes.

² Geneticist, Crops Research Division, ARS, USDA; formerly Collaborator in Agronomy, University of Illinois, now Research Associate in Field Crops, University of Missouri, Columbia, Mo.