野生马蹄金无性系构件种群组成及生物量结构变异性  

Diversity of Population Component and Biomass Structure of Cloned Wild Dichondra repens Forst.

作　　者：陈燕[1] 刘忠义[1] 干友民[1] 王昆蕾[1] 

机构地区：[1]四川农业大学动物科技学院草业科学系,四川雅安625014

出　　处：《江西农业学报》2008年第2期23-25,31,共4页Acta Agriculturae Jiangxi

基　　金：四川省科技厅应用基础研究专项基金项目(01SY051-27)

摘　　要：对我国23份野生马蹄金的无性系种群构件数量、质量性状及生物量结构进行比较分析,结果表明:不同种群构件的表型性状与数量呈现出变异性。单叶叶面积和叶柄长的变异系数较大,分别为39.35%和39.01%;叶长与叶宽变异系数都在20%以上;叶柄直径和叶片厚度的变异系数分别为14.80%和16.29%;匍匐茎长度的变异系数为27.29%,分枝数变异系数高达67.46%,间隔子长度、直径和数目以及根系的深度、直径变异系数较小;生物量结构方面,单位面积茎生物量、叶生物量和果实生物量的变异小,表明在一定环境中具有一定的可塑性。The quantitative, qualitative characters and biomass structure of population component from twenty-three cloned wild Dichondra repens Forst. in China were studied. The results showed that diversities existed among quantitative characters in the different population components. The coefficients of variation（CV） of leaf area and leafstalk length were 39.35% and 39.01% respectively, the CVs of leaf length, leaf width were both above 20% ,and the CVs of leafstalk diameter and leaf thickness were 14.80% and 16. 29%, respectively; the CV of stolon stem length was 27.29%, the CV of branch number reached 67.46%, but the CVs of the length, diameter and number of the spacer and the CV of the characters of root were small. Meanwhile, the significant diversity for biomass structure in different population components in this study was found, the CVs of the stem biomass, leaf biomass and fruit biomass were small, which indicated that some plasticity existed under certain environments.

关 键 词：马蹄金 野生资源 构件 生物量 变异性 

分 类 号：Q949.777.1[生物学—植物学]