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Published in Crop Sci 8:266-267 (1968)
© 1968 Crop Science Society of America
677 S. Segoe Rd., Madison, WI 53711 USA
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Cross-Compatibility of Trifolium nigrescent with Diploid and Tetraploid Trifolium occidentale1

Meei-chih Chou and Pryce B. Gibson2

Pollinations of diploid Trifolium nigrescent Viv. with pollen from diploid and tetraploid plants of Trifolium occidentale D. Coombe resulted in a seed set per floret of zero and 0.48, respectively. Pollen titibes from both sources of pollen penetrated the styles of the pistillate parent and reached the vicinity of the ovules.

Key Words: Trifolium hybrids • clover breeding • induced tetraploids • barriers to hybridization • pollen tube growth

1 Joint contribution from the Crops Research Division, Agricultural Research Service, U. S. Department of Agriculture, and the South Carolina Agricultural Experiment Station, Technical Paper No. 672. Part of a thesis submitted by the senior author in partial fulfillment of requirements for the M.S. degree at Clemson University, Clemson, South Carolina.

2 Formerly Graduate Assistant, Agronomy Department, Clemson University, and Research Agronomist, Crops Research Division, ARS, USDA, Clemson, S. C. 29631.

Received for publication October 5, 1967.


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W. M. Williams, H. A. Ansari, S. W. Hussain, N. W. Ellison, M. L. Williamson, and I. M. Verry
Hybridization and Introgression between Two Diploid Wild Relatives of White Clover, Trifolium nigrescens Viv. and T. occidentale Coombe
Crop Sci., January 16, 2008; 48(1): 139 - 148.
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