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前言关于小麦杂种后代性状的选择,已有不少报道(张树臻,1962:庄巧生等,1962)。这些研究主要是在早期世代进行的,而且多集中在亲本的配合力、遗传力或者上下代间的选择效果。关于杂种后代主要经济性状对产量的效应,特别是在正常密度下与品系产量的关系,报道不多。我们从1979到1982年,在不同密度下,用大量品系(总计240多个)研究了F_3、F_4单株性状选择对产量的效应,以及F_2—F_4代植株各性状间和上下代间的相关。初步查明了一些对品系产量选择较为有效的性状。
Preface There have been many reports on the traits of wheat offspring (Zhang Shuzhen, 1962: Zhuang Qiaosheng et al., 1962). These studies are mainly conducted in the early generation, and more focused on the combining ability of the parents, heritability or the effect of selection between the upper and lower generation. The effect of the main economic traits of hybrid offspring on yield, especially the relationship between the yield and the normal density of rice, has not been reported much. From 1979 to 1982, under different densities, a large number of lines (more than 240 in total) were used to study the effects of the F_3 and F_4 traits on yield and the correlations among the traits and the descendants of F_2-F_4 generations . Preliminary identification of some of the lines yield more effective selection of traits.