金线莲形态学性状与产量形成关系的多重分析

以13份金线莲种质为研究对象,对其9个性状（株高、地径、叶长、叶宽、植株叶面积、叶片鲜重、叶片数、高径比、植株鲜重）进行相关、通径和主成分分析。不同种源金线莲形态学性状变异系数为2.96%~12.59%,相关性研究表明植株鲜重与地径、株高和叶片数呈极显著正相关,与叶片鲜重呈显著正相关。通径分析表明株高对植株鲜重有最大的正向直接作用,并通过叶片鲜重和叶片数对植株鲜重有不同程度的间接作用。通过主成分分析,将金线莲形态学性状分为“高产型形态决定因子”和“产量的叶部决定因子”。在实际生产及良种选育过程中,应关注金线莲株高、叶片鲜重和叶片数等性状。

Multiple analysis of relationship between morphologic traits and yield formation of Anoectochilus roxburghii

Nine morphologic traits, plant height, ground diameter, leaf length, leaf width, leaf area of plant, leaf fresh weight, blades, length/width ratio, plant fresh weight of Anoectochilus roxburghii from 13 different areas were determined for correlation analysis, path analysis and principal components analysis. Different source of morphological trait variation coefficient of A. roxburghii was 2.96%-12.59%, plant fresh weight was significant positively correlated with ground diameter, plant height and leaf number, and positively correlated with leaf fresh weight. Path analysis showed that plant height had the largest positive direct effect on plant fresh weight, the leaf fresh weight and blades number had indirect effects on the plant fresh weight. Through principal component analysis, morphological traits of A. roxburghii can be divided into "Determinants of high-yielding morphology" and "Determinants of leaf production". In the actual process of production and breeding of A. roxburghii, we should pay attention to plant height, leaf fresh weight, blades numbers and other traits.