中国板栗 2 1个自然居群间等位酶遗传变异的空间自相关分析及 F-统计分析结果表明 :其多数等位基因频率在居群间呈随机分布模式 ,缺乏一定的空间结构 ;而部分等位基因表现为渐变或双向渐变的非随机分布模式 ,又具特定空间结构。中国板栗遗传变异空间结构模式的形成可能是长距离基因流、自然气候、人类活动、地理距离隔离等诸因素综合作用的结果。文中还就居群等位基因分布格局的成因进行了讨论 :在第四纪冰川后 ,中国板栗以长江流域中下游的孑遗中心为起点 ,等位基因分别沿着向北和向南的不同方向迁移形成现在的居群结构 ;季风气候和人类活动干扰是削弱居群分化的主要因素 ,而基于环境梯度的选择 ,是形成由北向南渐变分布的原因 Spatial autocorrelation analysis and F-statistic analysis of allozyme genetic variation among 21 natural populations of Chinese chestnut showed that the majority of allele frequencies were randomly distributed among populations and lacked certain spatial structure. Alleles appear as a non-stochastic pattern of graded or bidirectional gradients, with a specific spatial structure. The formation of spatial structure patterns of Chinese chestnut genetic variation may be the result of the combined effects of long-distance gene flow, natural climate, human activities and geographical distance isolation. The paper also discussed the genesis of the population distribution pattern of alleles: After the Quaternary glacier, the Chinese chestnut to the middle and lower reaches of the Yangtze River valley relic center as a starting point, the allele respectively along the north and south in different directions Migration to form the current population structure; monsoon climate and human disturbance is the main factor to weaken the population differentiation, and environmental gradient based on the choice of the formation of gradual change from north to south causes