不同种源鱼腥草形态变异规律  

Morphological differences in Houttuynia cordata from 23 different provenances in China

作　　者：吴令上[1] 斯金平[1] 蓝云龙 诸燕[1] 吕达[1] 

机构地区：[1]浙江林学院天然药物研究开发中心,浙江临安311300 [2]浙江省丽水市林业科学研究所,浙江丽水323000

出　　处：《浙江林学院学报》2009年第6期797-801,共5页Journal of Zhejiang Forestry College

基　　金：浙江省科技计划项目(2005C32052)

摘　　要：揭示全国鱼腥草Houttuynia cordata主产区种质资源形态变异规律,为选育鱼腥草优良品种提供依据。对23个种源鱼腥草叶片、花、果实和地上茎等性状进行系统调查,分析各性状间及它们与地理位置之间的相互关系。结果表明,不同种源鱼腥草叶片形态、植株花果数、果序长度、果序直径、果柄长度、蒴果数、种子数、株植株高度和地径等性状均存在显著差异,其中以叶片形态和植株花果数变异最大,植株高度和种子数次之;形态特征间存在明显相关性,根据形态特征可将不同种源鱼腥草划分为2个类型;2个类型在主要挥发油成分、随机扩增多态性DNA(RAPD)分子标记及生理等性状间存在显著的相关性。鱼腥草种质资源在形态、化学和生理等方面存在的差异性及其相关性为鱼腥草种质的遗传改良提供了物质基础和巨大潜力。To reveal the morphological variation in the main producing areas in China, eight characteristics of the leaves, flowers, fruits, and stems of Houttuynia cordata, namely fructescence length, diameter, and stalk length; flower or fruit number per plant; capsule number; seed number; plant height; and ground diameter; from 23 different provenances were investigated. Then the relationship between them or geographic origin was studied by analysis of correlation. The division of types based on cluster analysis. Results showed major differences（P〈0.01 ） for the eight characteristics within provenances with flower or fruit number per plant varying most （Rso = 82% ） followed by plant height and seed number. Meanwhile, morp hological characteristics were correlated with each other significantly （P〈0.05 or P〈0.01 ）. Furthermore, according to the main morphological characteristics of leaves and stems, the 23 provenances could be divided into two types. Therefore, morphological characteristics of H. cordata have a certain genetic basis allowing for a feasible division by type. Nevertheless, when breeding for excellent cultivars of H. cordata more comprehensive factors should be considered.

关 键 词：中草药 鱼腥草 种源 形态特征 变异规律 

分 类 号：S567.2[农业科学—中草药栽培]