不同组合方式对小麦性状遗传变异表现的影响:Ⅰ.籽粒产量和品质性状的遗传变异

The Effect of Crossing Pattern on the Inheritance and Variation of Wheat Traits:Ⅰ. Genetic Variation of the Yield and Quality Characters

利用单交、回交及三交三种组合方式研究普通小麦产量及品质性状的遗传变异，结果表明，单株产量和籽粒蛋白质含量、干、湿面筋含量和S．D．S沉淀值在回交群体中的遗传变异与轮回亲本有关，在三交群体中的遗传变异与第三亲本有关。用高值系本回交和用品质比较好的亲本作第三亲本进行三交，后代可能分离出更多的品质好的个体，这对选择比较有利。

With the single crosses, the back crosses and the 3-way crosses of wheat (Triticum aestivum L. ),the genetic variation of the yield and quality characters were stud-ied, and the results are as follows: The genetic variation of yield per plant and quality characters was correlated to the recurrent parent in back cross population and the third parent in 3-way cross population. It also showed that the back cross with higher value par-ent and the 3-way cross with other higher value parent as the third parent could greatly in-crease the probability of segregating plants with good quality characters.