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Published in Crop Sci 11:561-563 (1971)
© 1971 Crop Science Society of America
677 S. Segoe Rd., Madison, WI 53711 USA
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Inheritance of Resistance to Chemical Defoliation in American Upland Cotton, Gossypium hirsutum L.1

H. A. Peacock and B. S. Hawkins2

Data from S1, F1, F2, and BC1 populations treated with the defoliant, Def, indicated that resistance to chemical defoliation in Upland cotton, Gossypium hirsutum L., was controlled at a single locus. The symbol df was assigned to the gene in question. Two phenotypes were recognized in the F2 in the ratio of 3 susceptible (Df—): 1 resistant to chemical defoliation (dfdf).

Key Words: Plant genetics • Defoliator Nondefoliator

1 Joint contribution from Plant Science Research Division, Agricultural Research Service, U. S. Department of Agriculture, and the University of Georgia Agricultural Experiment Stations, Georgia Station, Experiment, Ga. 30212. Approved as Journal Series Paper No. 957 of the University of Georgia College of Agriculture Experiment Stations.

2 Research Agronomists, Plant Science Research Division, Agricultural Research Service, U. S. Department of Agriculture, Georgia Experiment Station, Experiment, Ga. 30212.

Received for publication January 18, 1971.




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