为探明大豆对大豆花叶病毒(SMV)重组型分离物(HB-RS)抗性遗传方式和不同抗性材料间抗性基因的等位性关系,利用抗病性鉴定获得的抗、感病大豆材料配制抗×感、抗×抗杂交组合,分析大豆携带抗性基因的遗传规律和等位性关系。研究结果显示5组抗感组合冀豆12×Franklin、冀豆17×10Y105、冀豆12×PI632401、PI96983×ZYD2738以及五星4号×FH13的F1均表现为抗病,F2植株符合3∶1或15∶1(抗∶感)分离比例;抗抗组合中,冀豆12与Newton和PI96983的F1和F2均表现抗病,冀豆12×V94-5152组合的F1植株表现抗病,F2呈现15∶1(抗∶感)的分离,冀豆17分别与Newton、PI96983及V94-5152组合的F1均表现抗病,F2出现15∶1(抗∶感)分离。分析表明,冀豆12、冀豆17和PI96983各由1对显性基因控制对重组型SMV(HB-RS)的抗性,五星4号的抗性由2对显性抗病基因控制;冀豆12携带的抗性基因与Newton和PI96983等位或紧密连锁,与V94-5152不等位,冀豆17携带的抗性基因与Newton、PI96983和V94-5152均不等位。
To understand soybean gene inheritance and allelism resistant to recombined- SMV isolate( HB-RS),crosses were made between resistant( R) and susceptive( S) cultivars. Results showed that F1 plants from R× S crosses( Jidou 12 × Franklin,Jidou 17 × 10Y105,Jidou 12 × PI632401,PI96983 × ZYD2738 and Wuxing 4× FH13) were resistant,and their F2 segregated in 3R∶ 1S or 15R∶ 1S. In R × R crosses,both F1 and F2plants of crosses Jidou 12 × Newton and Jidou 12 × PI96983 were resistant. F1 plants of Jidou 12 × V94- 5152 were resistant,and F2 segregated in 15R∶ 1S. In other crosses,F1 plants of crosses Jidou 17 × Newton,PI96983 and V94-5152 were resistant and F2 segregated in 15R∶ 1S. The results suggested that each of the cultivars( Jidou 12,Jidou17 and PI96983) carried 1 dominant resistant gene for HB- RS,and Wuxing 4 carried 2 dominant genes. The resistance gene from Jidou 12 was allelic or closely linked to those from Newton and PI96983,but not allelic with that from V94- 5152. The resistant gene from Jidou 17 was not allelic with those from Newton,PI96983 and V94-5152.