Inheritance of Resistance Chinese Wheat Stripe Rust Races CYR30 and CYR31 in Durum Wheat Line SWAHEN 3

SWAHEN 3, a durum wheat line introduced from CIMMYT, was highly resistant to Chinese new stripe rust races CYR30 and CYR31 at adult stage. In order to determince the inheritance of resistance in it, SWAHEN 3 was crossed with a highly susceptible durum variety Kappli and five highly susceptible cultivars of Sichuan common wheat. Analysis of data from F 1~F 2 of cross between SWAHEN 3 and Kappli revealed that the resistance to CYR30 and CYR31 of SWAHEN 3 was controlled by two complementary dominant genes. And all of F 1 hybrids of SWAHEN 3 crossed with five Sichuan common wheat cultivars were immune to the two Chinese stripe rust races. This result could indicated the resistance of SWAHEN 3 could be expressed in common wheat.