Crop Science Journal of Natural Resources and Life Sciences Education
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Published in Crop Sci 8:267-268 (1968)
© 1968 Crop Science Society of America
677 S. Segoe Rd., Madison, WI 53711 USA
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A Cynodon Dactylon (L.) Pers. (Bermudagrass) Clone with Five Accessory Chromosomes1

Jerrel B. Powell, Ian Forbes and Glenn W. Burton2

The bermudagrass clone P.I. 290899 from Pretoria, Republic of South Africa, had 2n = 36 plus five accessory chromosomes. The accessories were stained dark like the A-chromosomes, and were about one-half the size of the smallest A-chromosomes. They were almost isometrical in somatic smear preparations, and at meiosis associated with each other but not with the A-chromosomes. They frequently lagged at anaphase II, but were transmitted through the megagametophyte to two open-polllnated progeny plants.

Key Words: accessory chromosomes • Cynodon • bermudagrass • B-chromosomes

1 Cooperative investigations at Tifton, Georgia 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. 31794. Journal Series Paper No. 124, University of Georgia College of Agriculture Experiment Stations

2 Research Geneticist, Research Agronomist, and Research Geneticist, Crops Research Division, ARS, USDA, and University of Georgia College of Agriculture Experiment Stations, Coastal Plain Station, Tifton, Ga., respectively

Received for publication August 17, 1967.




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