三个小麦-簇毛麦易位系抗条锈性遗传及基因间关系分析

采用8个我国当前流行的条锈菌生理小种(菌系)对三个易位系进行抗锈性评价,并用CYR30、CYR31、Su-4和单孢菌系CYR32-6对三个易位系与感病品种铭贤169配制的F1、BC,1F1和F2代株系以及三个易位系之间双列杂交的F2株系进行遗传分析和等位性分析.结果表明:三个易位系是优秀的小麦抗条锈病资源;V9128-1对CYR30、CYR32-6和Su-4的抗病性由1对显性基因控制,对CYR31的抗病性由1显1隐2对基因独立控制,V9128-3对四个菌系的抗病性均由1对显性基因控制,V3对CYR32-6和Su-4的抗病性均由2对显性基因互补作用控制,对CYR31的抗病性由1显1隐2对基因独立控制或由1对显性基因控制;V9128-1与V9128-3对CYR31、CYR32-6和Su-4有相同或紧密连锁的抗病基因,且对CYR30、CYR32-6和Su-4的抗病基因与V3都不同.但与V3含有相同或紧密连锁的抗CYR31基因.

Genetic analysis and allelism test of three translocation lines from Triticum aestivum-Hayaldia villosa resistance to stripe rust

Three Triticum aestivum-Haynaldia villosa translocation lines were inoculated with eight dominant races (or single spore strains) of Puccinia striiforms f.sp. tritici prevalent in China. Three translocation lines, susceptible cultivar Mingxian 169 and their F₁, F₂, BC₁F₁ cross combinations and F₂ generations of set dialleds crosses among these three translocation lines were tested with races CYR30, CYR31, Su-4 and the single spore strains CYR32-6, respectively, allelism tests of these three translocation lines were also done. It showed that three translocation lines were excellent resource resistance. The V9128-1 resistance to CYR30, CYR32-6 and Su-4 were all controlled by one dominant gene, resistance to CYR31 were controlled by one dominant gene and one recessive gene, independently, single dominant gene conferring resistance to these four dominant races (or single spore strains) in V9128-3, two complementary dominant genes conferring resistance to both CYR32-6 and Su-4, one dominant gene and one recessive gene conferring independently or single dominant gene to confer resistance to CYR31 in V3; V9128-1 and V9128-3 contain same or tightly linked genes conferring resistance to CYR31, CYR32-6 and Su-4, V9128-1 and V9128-3 contain different genes conferring resistance to CYR30, CYR32-6 and Su-4 to V3, and contain one same or tightly linked gene confer resistance to CYR31.