基于叶片表型和矿质元素含量特征的油茶品种判别分析

Discriminant Analysis of Camellia oleifera Varieties Based on Leaves Phenotype and Mineral Elements Content Characteristics

以广泛栽培的‘长林’、‘湘林’、‘赣林’系列28个品种为对象,分析不同油茶品种的叶片表型和矿质元素含量特征,并探讨其在品种判别分析中的应用效果。结果表明,供试28个品种的叶片表型特征和矿质元素含量变异丰富,其中叶面积的变异系数最大(18.66%),形状系数、形状因子的变异系数最小(分别为1.68%、3.64%);油茶不同品种叶片中氮元素平均含量最高,其次为钙、钾和铝元素,镁、锰、硫和磷元素的含量相对较低,从变异系数来看,锰元素的变异系数最大(123.72%),磷、钾、钙、镁元素的变异系数居中(在13.34%~17.71%之间),而氮、硫和铝元素的变异系数最小(在6.77%~9.20%之间);油茶叶片表型特征和矿质元素含量在品种间均存在显著差异;以叶片表型和矿质元素含量指标为变量进行品种判别分析,实现了对供试28个品种的完全判别。本研究为油茶品种鉴别分析提供了思路和借鉴。

A total of 28 Camellia oleifera varieties from‘Changlin’,‘Xianglin’and‘Ganlin’series were selected to analyze leaves phenotype and mineral elements content,and their effect in varieties discriminant analysis was discussed.The results showed that rich variations were found in leaves phenotype and mineral elements content.And the leaf area showed the highest C.V.which was 18.66%.The C.V.of leaf shape coefficient and shape factor were the lowest,and they were 1.68%and 3.64%,respectively.The nitrogen content in leaf was the highest,followed by calcium,potassium and aluminium.The content of magnesium,manganese,sulphur and phosphorus were relative low.The C.V.of manganese content was the highest which was 123.72%.The C.V.of phosphorus,potassium,calcium and magnesium content were between 13.34%and 17.71%.And the nitrogen,sulphur and aluminium content showed the lowest C.V.which were between 6.77%and 9.20%.A significant difference was found among varieties in leaves phenotype and mineral elements content.And the discriminant analysis based on leaves phenotype and mineral elements content realized an accurate discrimination of 28 varieties.This research provides references for further varieties identification and analysis in Camellia oleifera in the future.