| 摘要: |
| 对４０个我国常用玉米自交系和２２个不同类型玉米材料测定的结果表明，玉米基因型间呼吸速率存在显著的差异，可做为基因型分析的重要生理指标。４０个自交系呼吸速率平均值为（ＣＯ２）６．６４ｍｇｄｍ＾－２ｈ＾－１，变异系数为２２．０３％。不同玉米类型间呼吸速率高低依次是普通杂交组合、姊妹系、自交系、糯质玉米和甜质玉米，与类型间光合速率高低的排列是一致的。杂交种呼吸速率呈明显的正优势，超中亲率平均为２４．５８ |
| 关键词: 玉米 基因型 呼吸速率 叶片 光合特性 |
| DOI： |
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| 基金项目:国家攀登计划项目!9219－2－3 |
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| Difference of Respiratory Rate (R) Among Genotypes in Maize (Zea mays L. ) and the Relationship Between R and Other Photosynthetic Characteristics |
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| Abstract: |
| By means of analysis of variance with experimental results obtained from 4 0 inbred lines that are widely utilized in production as well as 22 kind of breeding materials,it has been found that the difference of R among varieties of maize is as significant as 5% level, thus R value could be an important physiological criteria for genotype analysis. The average value of R measured under the same conditions with 4 0 inbred lines was (CO2)6. 64 mg dm-2h-1. The variation coefficient of R was 22. 03%. The order of respiratory rate value among different maize types, from the highest one of common hybrids, sister hybrids, inbred lines, clutinous maize till to the lowest one of sweet maize. Showed a consistent trend in term of photosynthetic rate for the four kind. The R value of hybrid expressed an obvious positive superiority. The relationship between hybrids and female parent in R was closer than male's. R and net photosynthetic rate (PN ) was of non -significant correlated, but, the leaf area, dry matter acculation respectively were negative significance. 40 inbred lines of maize could be divided into 8 groups according to their leaf R and PN by a cluster analysis. At last, some genotype with lower R va1ue and higher total photosynthesis amount can be selected. |
| Key words: Zea mays L.,genotypes,respiratory rate |
