Crop Science Journal of Natural Resources and Life Sciences Education
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Published in Crop Sci 25:686-688 (1985)
© 1985 Crop Science Society of America
677 S. Segoe Rd., Madison, WI 53711 USA
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Biotype E Greenbug Resistance in Wheat Streak Mosaic Virus-Resistant Wheat Germplasm Lines1

J. M. Tyler, J. A. Webster and E. L. Smith2

A new source of biotype E greenbug [Schizaphis graminum (Rondani) l resistance was identified in greenhouse screening tests from a group (CI 17881–17886) of wheat (Triticum aestivum L.) germplasm lines previously released as resistant to wheat streak mosaic virus (WSMV). The germplasm release statement from the South Dakota Agric. Exp. Stn. identified the pedigree of these lines as CI 15092/T. speltoides//‘Fletcher’ (CI 13985) /3/ 5*‘Centurk’ (CI 15075). Our objective was to determine the parental source of the greenbug resistance and to quantify the components of resistance. The particular T. speltoides accession used in the cross was unknown; however, it appeared to be the donor of the greenbug resistance, because the other parents of the cross were susceptible to biotype E in greenhouse tests. CI 17882 and CI 17885 exhibited the highest levels of resistance. The resistance in these lines is a new source that can be exploited in the development of greenbug-resistant wheat germplasm. New sources of greenbug resistance are needed because of the periodic occurrence of new biotypes.

Key Words: Schizaphis graminum (Rondani) • Wheat streak mosaic virus • Agropyron intermedium (Host) Beauv. • Triticum aestivum L. em Thell. • T. speltoides (Tausch) Gren. ex Richter

1 Cooperative research of the USDA-ARS and the Oklahoma Agric. Exp. Stn. Journal article J-4502 of the Oklahoma Agric. Exp. Stn., Oklahoma State Univ., Stillwater, OK 74078.

2 Graduate research assistant, Agronomy Department, Oklahoma State University, Stillwater, OK 74078; research entomologist, USDA-ARS, Plant Science Research Laboratory, P.O. Box 1029, Stillwater, OK 74076; and professor, Agronomy Department, Oklahoma State University, Stillwater, OK 74078.

Received for publication June 7, 1984.




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Environmental Quality		 The Plant Genome
Copyright © 1985 by the Crop Science Society of America.