摘要： 通过对46个杂种及21亲本自交系光合生产率的测定结果表明：F₁平均光合生产率优势为16.4%。用高光合生产率亲本作母本时F₁光合生产率优势超亲8.8%，反交F₁光合生产率优势超亲0.9%；母本光合生产率遗传力，大于父本光合生产率遗传力11倍。低光合生产率亲本的光合生产率遗传力大于高光合生产率亲本光合生产率的遗传力1.6倍。低光合生产率亲本作母本的连应遗传力达到42.1%。因此，以组配高光合生产率×低光合生产率的的组合为佳。

关键词: 玉米, 光合生产率, 杂种优势, 遗传力

Abstract: By determing the photosynthetic production rates in the 46 hybrids and 21 parental inbred lines,the results show that the dominancy of average photosynthetic production rate in F1 is 16.4%;when the parent of high photosynthetic production rate is used as female parent,the dominancy of the photosynthetic production rate in F1 is over its parent by 8.8%,otherwise,used as male parent,by 0.9%.The hereditary capacity of female parent is 11 times greater than that of male.The hereditary capacity of low photosynthetic production rate in parent is 1.6 times greater than that ot high,the additive hereditary capacity reaches 42.1% in parent of low pho tosynthetic production rate used as female.Therefore,it is the best combination that parent of high photosynthetic production rate used as female is combined with that of low.

Key words: Corn, Photosynthetic production rate, Hybrid vigor, Hereditary capacity