Crop Science Journal of Natural Resources and Life Sciences Education
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Published in Crop Sci 9:252-253 (1969)
© 1969 Crop Science Society of America
677 S. Segoe Rd., Madison, WI 53711 USA
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Chromosome Interchanges of Spontaneous Origin in Pearl Millet, Pennisetum Typhoides1

Jerrel B. Powell and Glenn W. Burton2

Two chromosome interchanges of spontaneous origin occurring in pearl millet, Pennisetum typhoides (Burm.) Stapf and C. E. Hubb., are described. One of domestic origin, first isolated from Inbred 13, also occurs in the inbred ‘Tift 239.’ A second, found in a plant introduction from Upper Volta, Africa, has one rearranged chromosome that is common to both interchanges, as evidenced by rings of six chromosomes that form at diakinesis in plants heterozygous for both. Pollen fertility is approximately 67% in heterozygous plants with the Tift T13 interchange and approximately 48% in plants heterozygous for both interchanges. Seed set in F2 plants segregating for the semisterility due to the Tift T13 interchange was 39% less than the fertile segregates in one population.

Key Words: Cattail millet • Pollen abortion • Ovule abortion

1 Cooperative investigations of the Crops Research Division, Agricultural Research Service, U. S. Department of Agriculture, and the University of Georgia, College of Agriculture Experiment Stations, Coastal Plain Station, Tifton, Ga. This work was supported in part by the U.S. Atomic Energy Commission Contract No. AT-(40-l)-2976. Journal Series Paper No. 338, University of Georgia, College of Agriculture Experiment Stations.

2 Research Geneticists, CRD, ARS, USDA, and the University of Georgia, College of Agriculture Experiment Stations, Coastal Plain Station, Tifton, Ga. 31794.

Received for publication August 21, 1968.




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