Co-Authors:
Gerechter-Amitai, Z.K., Agricultural Research Organization, The Volcani Center, P.O. Box 6, Bet Dagan, 50250, Israel
van Silfhout, C.H., Research Institute for Plant Protection, P.O. Box 9060, Wageningen, 6700 GW, Netherlands
Abstract:
Twenty-four entries of wild emmer possessing temperature-sensitive genes for resistance to yellow rust were studied in the seedling stage, at two temperature-profiles, with 15 pathogenic races from 11 countries in South America, Africa, Asia and Europe. It was shown that the majority of the resistance genes in these wild emmer entries were race-specific. In most of these entries a more resistant reaction was displayed at the higher temperature-profile; however in three entries a shift in reaction towards resistance was observed with certain races but towards susceptibility with some of the other races, suggesting that two different kinds of temperature-sensitive genes were involved in each of these entries. The similarity of temperature-sensitive genes occurring in wild emmer and in cultivated wheat is discussed. © 1989 Kluwer Academic Publishers.
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