野慈姑自然群体异交率的定量估测  

Quantitative Estimates of Outcrossing Rates in Natural Populations of Sagittaria trifolia Linn.

作　　者：汪小凡[1] 陈家宽[2] 

机构地区：[1]武汉大学生命科学学院,武汉430072 [2]复旦大学生物多样性科学研究所,上海200433

出　　处：《遗传》2000年第5期316-318,共3页Hereditas（Beijing)

基　　金：国家自然科学基金资助!项目(39870082)

摘　　要：用自然群体取样和同工酶遗传标记的方法对沼生植物野慈姑（Sagittaria trifolia Linn.）及其变型长瓣慈姑[S.trifolia Linn. f. longiloba (Turcz.) Makino]的异交率作了定量研究，3个自然群体的异交率估计值为=91.0％～98.0％，表明该种为异交占绝对优势的交配系统。在野慈姑各群体间未发现异交率的显著差异。The outcrossing rates of Sagittaria trifolia Linn.and S.trifolia Linn.f.longiloba(Turcz.) Makino,a helophyte species and a form under the species,were estimated by sampling from natural habitats and using isozyme locus as genetic marker.According to the values of outcrossing rates in 3 populations( =91.0％ ～ 98 0％ ),the mating system of the species studied was found to be dominated by outcrossing mechanisms Statistical analysis suggested that there was no significant difference in outcrossing rates among the populations

关 键 词：野慈姑 自然群体 异交率 交配系统 系统演化 

分 类 号：Q943[生物学—植物学]