摘要
本实验在人工接种大豆灰斑病菌的条件下，利用五个不同类型的杂交组合的Ｆ＿１、Ｆ＿２、Ｆ＿３进行抗性分析。结果表明：双亲抗感差异大的组合较双亲抗感差异小的组合的Ｆ＿２代变异系数高３２．４％，但到了Ｆ＿３、Ｆ＿４代变异系数之比仅为１．０８：０．９６。双亲抗感差异大的（抗×感）、（感×抗）组合的抗性随世代的升高而下降；双亲抗感差异小的（感×感）、（抗×抗）组合的抗性随世代的升高而提高。本文讨论了这两种杂交后代抗性遗传规律的原因，以及在抗性育种亲本选配和后代选择上的应用。
The resistance to C. Sojina Hara in F_2,F_3 and F_4 geperatin of five different soybean cross combinations is discussed in this paper. Resistence declines along with the sdvance of generations in the (resistnce ×susoeptible)and (susoeptible × resistenoe) cross combinatons.On the other hand,resistance becames higher in the advance of generations in the (resistance × resistance)and (susceptible ×susceptible)cross combinations. The specific values of the coeffident of variability in F_2,F_3 and F_4 of the two sort cross combinations are 1. 32, 1 .08 and 0. 96,respectively. The genetic behavior of the two different mode of change of resistance and the application on parent mating and progeny selection in breding for resistance are discussed.
出处
《大豆科学》
CSCD
北大核心
1995年第2期180-184,共5页
Soybean Science
