矮慈姑自然居群的克隆生长格局

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23个等位基因的检测结果的一致性分析，在由120个单株组成的矮慈姑自然居群中，总基株数G=20；平均克隆大小Nc=6；不同基因型比率PD=1．6667；克隆的基因型多样性Simpson指数D=O．8496；克隆的基因型分布均匀性Fager指数E=O．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．

Pattern of Clonal Growth in a Natural Population of Sagittaria pygmaea Miq. (Alismataceae)

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.