摘要： 对5个自交系及其组配的4个杂交种光合性能的分析表明，杂交种较其亲本在光合面积上表现出三种关系类型，即居中、偏高亲、超高亲；而在光合时间上表现为负优势；在光合速率上表现为正优势，幅度在3.1%~23.4%,超高亲2.4%~9.3%.光合速率杂种优势与叶绿素含量有关。杂交种的叶绿素a/b和类胡萝卜素/叶绿素较亲本有降低的趋势。结合产量及有关性状分析表明，杂交种较自交系不仅在源上而且在库系统上均有明显改善

关键词: 玉米, 杂交组合, 光合性能

Abstract: The photosynthetic characteristics of 4 hybrids and their parents of corn were comparetively analysed in this paper.There were 3 kinds of types in leaf area of hybrids:middle,inclined to high parent and superhigh parent. The hybrid was negative hybrid vigor in photosynthetic time,but positive vigor in photosynthetic rate which ranged from 3.1% to 23.4%.The photosynthetic vigor in hybrid was related with concentration of chlorophyll.The ratios of chlorophyll a/b and carotene/chlorophyll in hybrids were lower than that in their parents. Hybrid vigor in grain yield primarily dependent upon the sink and source system.

Key words: Corn, Photosynthesis, Hybrid

中图分类号: 

• S513.035