小慈姑的遗传多样性和居群分化  

GENETIC DIVERSITY AND POPULATION DIFFERENTIATION OF SAGITTARIA POTAMOGETIFOLIA MERR.

作　　者：陈锦华[1] 孙爱珍[1] 汪小凡[1] 

机构地区：[1]武汉大学生命科学学院植物发育生物学教育部重点实验室

出　　处：《水生生物学报》2006年第5期570-577,共8页Acta Hydrobiologica Sinica

基　　金：国家自然科学基金(30521004;30470121);教育部重点实验室开发课题资助

摘　　要：小慈姑是中国南部狭域分布的易危水生植物。采用聚丙烯酰胺凝胶电泳和等位酶分析方法,研究了该种江西东乡、湖南茶陵、广西桂林和福建武夷山4个地点的8个自然居群的遗传分化及其与地理位置的相关性。9个酶系统18个等位酶位点的检测结果表明,小慈姑有较高水平的遗传多样性:多态位点百分率P=16.67%—38.89%,平均每位点等位基因数A=1.278—1.833,平均预期杂合度He=0.0941—0.1928,平均观察杂合度Ho=0.1461—0.2127。居群之间有较高的遗传一致度I=0.7161—0.9965。根据Nei s遗传距离所作出的聚类分析显示,同地居群之间有较紧密的遗传关系,居群间的遗传分化与空间距离呈正相关。Sagittaria potamogetifolia Merr.,a species of helophytic herb limitedly distributed in Southern China,is a member of the monocotyledonous family Alismataceae.It features monoecism with unisexual flowers,apocarpous gynoecium,self-compatibility,entomophilous pollination,and extremely high efficiency of fruit-set.For determining the genetic diversity and population differentiation of the species,eight populations were sampled from four provinces of China: Jiangxi,Hunan,Guangxi and Fujian,and were detected by m...

关 键 词：小慈姑 遗传分化 空间距离 等位酶分析 

分 类 号：Q943[生物学—植物学]