Crop Science Journal of Natural Resources and Life Sciences Education
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Published in Crop Sci 12:472-474 (1972)
© 1972 Crop Science Society of America
677 S. Segoe Rd., Madison, WI 53711 USA
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Intermediate and Pubescent Wheatgrass Complex in Native Collections from Eastern Turkey1

Emmanuel K. Mariam and James G. Ross2

Agropyron intermedium (Host) Beauv. and A. trichophorum (Link) Richt. have been distinguished on the basis of the first species having smooth glumes and lemmas, and the second being pubescent. This separation has broken down because both characters occurred within original introductions from Russia and are found even within selected varieties. This study was conducted on herbarium specimens and on progenies from plants open pollinated under natural conditions. Collections were made at 11 sites in Erzurum Valley in the vicinity of Ataturk University in Eastern Turkey to obtain information on the distribution of smooth and pubescent plants in naturally occurring colonies where the plants are native. Similar proportions of smooth and pubescent plants occurred irrespective of the location of the colonies, and segregation for pubescence occurred in families from both pubescent and smooth parents. It was concluded that the original introductions containing smooth and pubescent plants truly represented the native material and that the two taxa should be combined into a single species, A. intermedium (Host) Beauv.

Key Words: Taxonomy • Agropyron intermeduim • Agropyron trichophorum

1 Published with the approval of the Director as paper No. 1053 Journal Series of the South Dakota Agricultural Experiment Station.

2 Former USAID graduate Trainee and Professor in Plant Science, South Dakota State University. Brookings, South Dakota 57006.

Received for publication January 5, 1972.




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