VIEW ARTICLE

A Gene for Resistance to Puccinia graminis f. sp. tritici That is Present in Wheat Cultivar H-44 but not in Cultivar Hope. G. J. Green, Plant pathologist, Agriculture Canada, Research Station, 195 Dafoe Road, Winnipeg, Manitoba, R3T 2M9; P. L. Dyck, plant geneticist, Agriculture Canada, Research Station, 195 Dafoe Road, Winnipeg, Manitoba, R3T 2M9. Phytopathology 69:672-675. Accepted for publication 16 January 1979. Copyright 1979 The American Phytopathological Society. DOI: 10.1094/Phyto-69-672.

A backcross line of Marquis wheat carrying gene Sr9d from H-44 was more resistant to Puccinia graminis f. sp. tritici than was a second backcross line carrying Sr9d from Hope. The difference in reaction was caused by a second gene for resistance in the H-44 line. The gene was present in H-44 but was not present in Hope or the Sr9d (Hope) line. The nature of the resistance conferred by this second gene and the relationship of the gene to other genes for resistance in Hope and H-44 are discussed.