Inheritance Of 5 Translocation Lines From Commom Wheat/Elymus Mollis (Trin.) Hara Resistance To Stripe Rust

Stripe rust, caused by Puccinia striiformis f.sp. tritici, is one of the most serious diseases of wheat in the worldwide. Genetic resistance and planting resistant cultivars is the most effective, economical, and environment-friendly method of managing stripe rust. However, high genetic variation and the ability of the pathogen to evolve into new races with added new virulence always have been the major limiting factors in a successful long-term management of stripe rust when race-specific resistance genes are used. As a result,"Break- down"of such race-specific stripe rust resistance genes is a consequence of pathogen acquiring new virulence. Geneticists and plant breeders pay more attention to wild relatives to search new resistant germplasms. So, for controlling stripe rust, identifying new resistant genes is an important method. The inheritance of 5 translocation lines from common wheat/ Elymus mo11is (Trin.) Hara resistance to stripe rust were studied in this research. The results are as follow:1. The result indicated that the resistance genes of 5 translocation lines conferring to stripe rust came from Elymus mo11is (Trin.) Hara. The translocation lines are : M853-2,M853-4,M8657-1,M8657-4, M853-1,the donor parent is Elymus mo11is (Trin.) Hara, the acceptor parent is common cultivar 7182 , they all inoculating with stripe rust strain CY29,CY30,CY31,CY32,Su4,Su11.2. The genetic analysis showed the resistance genes of 5 translocation lines conferring to stripe rust were different after seedling inoculating with 6 stripe rust races.3. The stripe rust resistance analysis showed:(1) Resistance of M853-2 conferring to CY29 were controlled by two dominant genes and one recessive gene(karyoplasms); Resistance conferring to CY30 was controlled by three recessive genes and two recessive and one dominant genes,they were related to extranuclear; Resistance conferring to CY31 was controlled by two dominant karyoplasms genes; Resistance conferring to Su4 was controlled by two dominant genes and one dominant gene and one recessive extranuclear genes, they were related to extranuclear; Resistance conferring to Su11 was controlled by a single dominant karyoplasms gene.(2) Resistance of M853-4 conferring to CY29,CY30,CY31 were all controlled by a...