【摘要】 太湖流域粳稻地方品种黑壳子粳对稻瘟病菌表现抗谱广、抗性强的特点。利用黑壳子粳与感病的云南稻地方品种丽江新团黑谷杂交获得的F1、F2 和RIL群体 ,在苗期喷雾接种研 5 4 0 4和北 1两个日本稻瘟病鉴别菌系 ,根据抗感反应分析亲本的抗病基因组成。结果表明 ,黑壳子粳对菌系北 1的抗性由一对显性基因控制 ,对菌系研 5 4 0 4的抗性由两对互为独立遗传的显性基因控制。等位性测定结果和重组自交系的抗感反应表明 :黑壳子粳对菌系北 1的抗病基因兼抗菌系研 5 4 0 4 ,该抗病基因与Pi k、Pi z、Pi ta、Pi b、Pi t等 5个已知抗病基因座呈非等位关系 ,也不是Pi i和Pi a基因 ,推断是一个未知的新基因 ;另一个抗病基因抗菌系研 5 4 0 4、感菌系北 1。更多还原

【Abstract】 Japonica rice landrace Heikezijing (HKZJ) from Taihu region is highly resistant to several Chinese and Japanese differential strains of Magnaporthe grisea . The F 1, F 2 and RIL populations from the cross between the resistant variety Heikezijing and the susceptible variety Lijiangxintuanheigu (LJXTHG) were inoculated by spray with two strains of Ken 54 04 and Hoku 1 in seedling stages. Based on the R∶S ratios of segregation in F 1, F 2 and RIL populations it was showed that there were two independent dominant genes in Heikezijing in responsible for resistance to strain Ken 54 04 and one dominant R gene to strain Hoku 1 which is the same to one of the two genes resistant to Ken 54 04. The allelic test indicated that the gene with resistance to both Hoku 1 and Ken 54 04 is non allelic to loci of Pi k, Pi z, Pi ta, Pi b and Pi t , also neither Pi i nor Pi a gene. It is necessary to confirm whether it is an unknown gene.更多还原