【摘要】 <正> 粒重是构成水稻产量的重要性状,谷粒形状影响粒重的大小和稻米的品质,并因消费者的要求而关系到稻米的商品价格,历来受到育种工作者的重视。但对这些性状遗传规律的研究还很有限,结论也不一致,如对粒长的遗传就有多种假设:从单基因、双基因、三基因到实质上的多基因遗传。国内周傲南、朱立宏（1964）对3个粳稻杂交组合的粒重及粒形的研究表明:F₁粒重无超亲现象,粒长、粒宽均属中间型;粒重F₂呈连续变异,出现两亲本原有的极端类型,但没有超出两亲本的范围;且F₁、F₂呈一更多还原

【Abstract】 The heritability features of weight and shape of F₁’s grains were estimated and analysed by Hayman’s model on the data of hsien rice diallel crosses of six parents.Results of this experiment indicated that the additive effect was mainly on length and width; the thickness ofgrains was controlled by the additive, dominant and epistatic effect, the grain weight was attributed to additive effect and partially dominant and epistatic effect. The narrow mean heritability of these characters was rather high. The grain weight was affected by environment through grain thickness.更多还原