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本文应用对 SMV 3号株系不同抗性的4个亲本配制6个杂交组合,在接种 SMV 3号株系条件下研究其后代的抗性表现。结果表明,6个组合的 F_1代其成株抗性均倾向抗性亲本,抗病为显性。其 F_2代分离出抗病与感病单株比率为3:1,表明 D82—198和 merit 对 SMV 3号株系的抗性受一对显性基因控制,为质量性状,而D82—198的抗性不受正反交的限制,无母体效应。
In this study, we constructed 6 hybrid combinations of 4 parents with different resistance to SMV 3 and studied their offspring’s resistance performance under inoculation of SMV 3 strain. The results showed that all the F1 combinations of six combinations tended to be resistant to the adult plants and their disease resistance was dominant. The ratio of resistance to susceptible plants isolated from F_2 generation was 3: 1, indicating that the resistance of SMV 3 to D82-198 and merit was controlled by a pair of dominant genes and the quality traits of D82-198 Resistance is not subject to the restrictions of reciprocal cross, no maternal effect.