安徽黄山青冈种群遗传结构的空间自相关分析

以黄山－青冈（Ｃyclobalanopsis glauca)种群为例，研究了种群内等位基因的空间格局，在种群内，大多数等位基因的Moran'sI数大于期望值，但只有两个等位基因存在显著的正空间自相关；如果考虑不同的无性系分株时，大多数等位基因在短距离内存在显著的空间自相关。相关图表明不同距离间隔，Moran'sI指数变化无规律，表明没有哪个进化因子起决定作用，但无性系繁殖在空间自相关中起重要作用，尤其是在近距离。

SPATIAL AUTOCORRELATION OF GENETIC STRUCTURE IN A POPULATION OF CYCLOBALANOPSIS GLAUCA IN HUANGSHAN, ANHUI

Genetic structure is defined as non-random distribution of genetic variation, and this study utilised spatial autocorrelation analysis to analyse variation among genotypes in a single population as, especially for within deme analysis, it is better than F-statistics or GST. The genotype of all individuals ≥2.5　cm DBH in a western Huangshan population of Cyclobalanopsis glauca was detected using allozyme analysis, and spatial autocorrelation of each allele was then analyzed using Moran's I. Most Moran's I values for alleles were larger than expected values, but two of the alleles had significant positive spatial autocorrelation. Detailed analysis showed that most alleles were significantly spatial-autocorrelated at short distances. A correlogram showed positive spatial autocorrelation in all alleles except Est-2-d at short distances (0-5 m). In general, Moran's I indices decreased as distance interval increased. However, the trends of different alleles varied, and therefore no dominant evolutionary factors could be identified.