摘要
以黄山一青冈 (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's I指数大于期望值 ,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's I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 。
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 G ST . 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.
出处
《植物生态学报》
CAS
CSCD
北大核心
2001年第1期29-34,共6页
Chinese Journal of Plant Ecology
基金
国家重点基础发展规划项目! (2 0 0 0 0 46 80 1)
国家自然科学基金项目 !(39370 135 )
