4个春小麦种质资源苗期抗条锈基因遗传分析

摘要

To research the resistance hereditary rule of four spring wheat germplasm resources,seven dominant races (or single spore strains) of Puccinia striiforms f.sp.tritici prevalent in China were used to evaluate stripe rust resistance at seedling stage.The genetic analysis of stripe rust resistance gene was also conducted.The result shows that,all four germplasm resources are characterized racespecific resistance to stripe rust,and the resistance spectrum of every germplasm resource is different.The result of genetic analysis indicate that the spring wheat germplasm resource ‘MY005846'contains one dominant and one recessive gene conferring independent resistance to CYR33,one recessive gene conferring resistance to CYR32,two dominant genes conferring independent resistance to CYR27,one dominant gene conferring resistance to CYR25 and CYR23,and two dominant genes conferring complementary resistance to Sun11-6;the resistance of wheat germplasm resource ‘ZM018858'is controlled by two complementary dominant genes for CYR32,two independent lydominant genes for both of CYR27 and CYR25,complementary one dominant and one recessive gene for both of CYR23 and Sun11-4;wheat germplasm resource ‘YJ003412'contains one dominant gene and one recessive gene conferring complementary resistance to CYR33,one recessive gene conferring resistance to CYR32 and CYR25,one dominant gene and one recessive gene conferring independent resistance to CYR23;the resistance of wheat germplasm resource ‘YJ003417'to CYR23 and CYR25 is both controlled by one dominant gene.%为研究4个春小麦种质资源的抗条锈病特点和抗性遗传规律,采用7个条锈菌生理小种(菌系)对4个春小麦资源进行苗期抗条锈性评价和抗条锈性遗传分析.抗性评价结果表明,4个春麦资源都具有抗条锈性,且表现有抗性小种专化性,各个春麦资源的抗病谱也不同.遗传分析结果表明,春麦资源‘MY005846’对CYR33的抗性由一显一隐2对基因独立作用,对CYR32的抗性由1对隐性基因作用,对CYR27的抗性由2对显性基因独立作用,对CYR25和CYR23的抗性都是由单显性基因作用,对Sun11-6的抗性由2对显性基因共同作用;春麦资源‘ZM018858'对CYR32的抗性由2对显性基因共同作用,对CYR27和CYR25的抗性都是由2对显性基因独立作用,对CYR23和Sun11-4的抗性都是由1显1隐2对基因共同作用;春麦资源‘YJ003412'对CYR33的抗性由1显1隐2对基因共同作用,对CYR32和CYR25的抗性都是由1对隐性基因作用,对CYR23的抗性由1显1隐2对基因独立作用;资源‘YJ003417'对CYR23和CYR25的抗性都由1对显性基因作用.