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Published in Crop Sci 8:771-773 (1968)
© 1968 Crop Science Society of America
677 S. Segoe Rd., Madison, WI 53711 USA
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Polyembryony in Pearl Millet, Pennisetum typhoides1

Jerrel B. Powell and Glenn W. Burton2

Polyembryonic caryopses that give rise to twin and triplet seedlings have been found in several inbred lines of pearl millet. Near-equal and unequal twins, fused and non-fused coleoptile types, and identical and non-identical triplets were encountered. Some evidence for the inheritance of polyembryony was accumulated. Inbreds differed markedly in frequency of polyembryonic caryopses, but thermal-neutron radiation, ethyl methane sulfonate, and diethyl sulfate treatment of the seed were not conclusively shown to increase the frequency of twin and triplet seedlings. Triploid and tetraploid types were recovered from the diploid pearl millet.

Key Words: twins • triplets • heteroploid seedlings • tetraploidy • triploidy

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, Georgia. The authors wish to acknowledge support of this investigation in part by the U.S. Atomic Energy Commission Contract No. AT- (40-l)-2976, and are appreciative of the assistance of Hubert Wood in locating many of the aberrant seedlings. Journal Series Paper No. 285, University of Georgia, College of Agriculture Experiment Stations.

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

Received for publication June 14, 1968.




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