矮慈姑自然居群的克隆生长格局

矮慈姑自然居群的克隆生长格局 Pattern of Clonal Growth in a Natural Population of Sagittaria pygmaea Miq. （Alismataceae） 陈锦华 CHEN Jin-hua 1 1 2 3 4 first-author 汪小凡 WANG Xiao-fan 1 1 2 3 4 吕应堂 LU Ying-tang 1 1 2 3 4 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 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 College of Life Sciences, Wuhan University/Key Laboratory of MOE for Plant Developmental Biology College of Life Sciences, Wuhan University/Key Laboratory of MOE for Plant Developmental Biology 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,湖北,武汉,430072 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,湖北,武汉,430072 Department of Biology, Xiaogan University Department of Biology, Xiaogan University 孝感学院生物系 孝感学院生物系 ,湖北,武汉,430072 ,湖北,武汉,430072 采用等位酶分析方法 ,研究了矮慈姑一个自然居群的克隆多样性与空间格局 .根据 9个酶系统 16个等位酶位点 2 3个等位基因的检测结果的一致性分析 ,在由 12 0个单株组成的矮慈姑自然居群中 ,总基株数G =2 0 ;平均克隆大小Nc =6 ;不同基因型比率PD =1.6 6 6 7;克隆的基因型多样性Simpson指数D =0 .84 96 ;克隆的基因型分布均匀性Fager指数E =0 .8371.克隆生长空间格局分析表明 ,矮慈姑自然居群中的克隆之间有明显的相互交错 ,克隆构型为混合型 ,分株居群的构型有游击型、密集型以及这两者之间的过渡类型 The clonal diversity and the spatial pattern in a natural population of Sagittaria pygmaea Miq. were determined by means of alleles analysis. A moderate level of clonal diversity was estimated based on 23 alleles of 16 loci in 9 enzyme systems. The clonal diversity indexes were respectively: number of samples N=120, number of genotype G=20, average number of clones N c=6, proportion distinguishable PD=1.666 7, cloned diversity of genotype Simpson’s index D=0.849 6, distributional uniformity of genotype Fager’s index E=0.837 1. The analysis of clonal structure demonstrated that there were obvious staggers among clones of a natural population of S. pygmaea, and the spatial pattern of clonal growth was a mixed clonal architecture. The architectures of ramet population included guerilla, phalanx and transitional type between guerilla and phalanx. 矮慈姑 自然居群 等位酶 克隆多样性 空间格局 Sagittaria pygmaea clonal diversity spatial pattern natural population allozyme Q943 国家自然科学基金资助项目 （ 3 9870 0 82 ,3 0 170 15 7） 2003-04-01 2021-04-01 4