【摘要】 研究了11个杂交组合的遗传力和遗传相对进度。结果表明不同性状的遗传力不同,同一性状的遗传力在不同组合间也存在崖异。在间母异父或同父异母组合中,不同父本或母本对某性状后代表型的影响大小不同。同一材科分别与不同材料组成不同组合时,该材料对各性状后代表型的影响大小在不同组合中有差异。不同性状的遗传相对进度不同,同一性状在不同组合间的遗传相对进度也不同。利用遗传相对进度作为杂种后代的选择指标,既考虑到了各性状遗传力的高低不同,也考虑到了各性状分离类型的多寡,比单纯利用遗传力做为衡量选择效果的指标要优越。更多还原

【Abstract】 Using F₂ generation of eleven sorghum （Sorghum vulgare） crosses, the broad sense heritabilities and relative genetic advance- merits of nine main traits were studied. The results indicated that the heritabilities of different traits were different and that of the same trait were also different in different crosses. In the crosses having a same female parent but different male parents or having a same male parent but different feamle parents, the affection of different male parents or female parents on the phenotypes of one of the traits in their progenies were different, when a parent was crossed with others, the affection of it on the phenotypes of various traits in its progenies were differnt in different crosses, two. The relative genetic advancements of different traits were different and that of the same trait were also different in different crosses. It is better to use the rdative genetic advancements as a selection index on the hybrid progenies than use the heritabilities only, becaue in this way not only the difference of the heritabilities among the traits is involveed, but also the quantity of the segregative types of the traits.更多还原