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本试验以20个大豆[Glycine max (L) Merr]品种为试材对叶部形态、生理性状及解剖特征进行了测定,加以相关和通径分析,并首次对10个叶部光合性状进行主成份分析。研究表明:(1)叶形指数与光合速率呈负相关,表现为很小的负效应。(2)单位叶面积的叶绿素、全N含量均与光合速率呈正相关,表现为正效应。(3)比叶重与光合速率呈正相关,表现为极小的正效应,且通过叶片厚度的间接正效应远大于其直接效应。(4)叶片厚度与光合速率呈极显著正相关,表现为正效应。(5)栅栏细胞数目与光合速率呈极显著正相关,表现为较高的正效应。(6)栅栏、海绵组织厚度与光合速率分别呈极显著和显著正相关,但均表现为负效应。分析表明:通径分析与主成份分析相结合的方法是进行光合速率综合的间接选择的有效方法。
In this study, 20 soybean (Glycine max (L) Merr] cultivars were used to study the morphological, physiological and anatomical characteristics of leaves. Correlation and path analysis were carried out. The photosynthetic characteristics of 10 main leaves Ingredient analysis. The results showed that: (1) Leaf index was negatively correlated with photosynthetic rate, showing a small negative effect. (2) The leaf chlorophyll and total N content per unit area were positively correlated with photosynthetic rate, which showed a positive effect. (3) There was a positive correlation between specific leaf weight and photosynthetic rate, indicating a very small positive effect, and the indirect positive effect through leaf thickness was much larger than its direct effect. (4) Leaf thickness and photosynthetic rate were significantly and positively correlated, showing a positive effect. (5) The number of palisade cells was significantly and positively correlated with photosynthetic rate, showing a positive effect. (6) The thickness of palisade and spongy tissue had a significant and significant positive correlation with photosynthetic rate respectively, but both showed negative effects. The analysis shows that the combination of path analysis and principal component analysis is an effective method for indirect selection of photosynthetic rate synthesis.