大豆种质对SMV1号株系的抗性遗传

Inheritance of Resistance to SMV Strain No.1 in the Soybean Germplasms

采用４个抗病毒病种质配制４个抗×感组合，以Ｆ１、Ｆ２代群体对ＳＭＶ１号株系的抗性进行鉴定和分析。结果表明，４个抗病种质的Ｆ１代，其成株抗性和抗种粒斑驳均表现为显性；哈８８－７７０４、哈８８－２４９８的Ｆ２代抗感分离比例为９∶７，成株抗性受两对互补显性基因控制；哈８８－２５０１和合丰３３的Ｆ２代抗感分离比例为３∶１，成株抗性受一对显性基因控制；上述４份种质对种粒斑驳的抗性均受一对显性基因控制。哈８８－２５０１和合丰３３对ＳＭＶ１号株系的成株抗性和抗种粒斑驳均受一对显性基因控制，而哈８８－７７０４和哈８８－２４９８则受不同对基因控制。

Four crossing combinations of resistant×susceptible were made with 4 resistant germplasms and susceptible varieties. Performance in F 1 of the four crosses revealed that mature plant resistance and seed mottling resistance were all dominant. Mature plant resistances of Ha 88-2501 and Hefeng 33 were conditioned by a pair of dominant genes, and the segregation ratio in F 2 between the resistant and the susceptible was 3:1. Mature plant resistances of Ha 88-7704 and Ha88-2498 were conditioned by two complementary dominant genes, the segregation ratio in F 2 between the resistant and the susceptible was 9:7. Resistances to seed mottling of Ha88-2501,Ha88-7704, Ha88-2498 and Hefeng33 were conditioned by a pair of dominant genes, the segregation ratio between the resistant and the susceptible was 3:1. Mature plant and seed mottling resistances to SMV strain 1 of Ha88-2501 and Hefeng 33 were also conditioned by a pair of dominant genes while those of Ha88-7704 and Ha88-2498 were conditioned by other different genes.