Co-Authors:
Gerechter-Amitai, Z.K., Agricultural Research Organization, The Volcani Center, P.O. Box 6, Bet Dagan, 50 250, Israel
Sharp, E.L., Department of Plant Pathology, Montana State University, Bozeman, 59717, MT, United States
Reinhold, M., Department of Plant Pathology, Montana State University, Bozeman, 59717, MT, United States
Abstract:
Twenty-six selections of wild emmer collected at different sites in Israel and three entries obtained from Turkey were studied for the possible presence of temperature-sensitive genes controlling reaction to Puccinia striiformis. In tests carried out in Israel with a local P. striiformis isolate at two temperature regimes, 16 selections showed a change in infection rating toward resistance at the higher temperature regime. In comparable tests performed in the United States with a Montana P. striiformis isolate of different virulence pattern-including 14 of the same selection-ten entries displayed a temperature-sensitive reaction. Although slightly different temperature regimes were used in Israel and the United States, the results obtained were in general agreement. The shift toward resistance observed in the seedling tests at the higher temperature-profile was also evident in the field in the mature plant stage with increasing spring temperatures. © 1984 Dr. H. Veenman en Zonen B.V.