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Published in Crop Sci 11:895-899 (1971)
© 1971 Crop Science Society of America
677 S. Segoe Rd., Madison, WI 53711 USA
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Interspecific Hybridization of Trifolium uniflorum L.1

Pryce B. Gibson, Chi-Chang Chen, J. T. Gillingham and O. W. Barnett2

Interspecific hybrids were obtained by crossing Trifolium uniflorum L. with T. repens L. and colchicine-induced autotetraploid T. occidentale D. E. Coombe. The conclusion that the matings resulted in species hybrids was based upon morphological, cytological, and chemical evidence. The hybrids were vigorous plants, producedflowers, and varied in fertility. Multiple-species hybrids of the three species were easily obtained. Trifolium uniflorum and T. occidentale have characteristics that possibly can be used to develop improved varieties of T. repens.

Key Words: Cytology • Hybrid verification • Clover improvement • Diverse germ plasm • Chemotaxonomy • Trifolium occidentale • Trifolium repens

1 Cooperative investigations of the Plant Science Research Division, Agricultural Research Service, US Department of Agriculture, and the South Carolina Agricultural Experiment Station, Clemson, S. C. Published with the approval of the Director of the South Carolina Agricultural Experiment Station as Technical Paper No. 925.

2 Research Agronomist, Plant Science Research Division, Agricultural Research Service, US Department of Agriculture; Visiting Assistant Professor of Agronomy, Associate Chemist, Chemical Services (Agr.), and Assistant Plant Pathologist, Department of Plant Pathology and Physiology, South Carolina Agricultural Experiment Station, Clemson, S. C. 29631.

Received for publication May 15, 1971.




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