本文研究了广西沙质土壤和淤泥质土壤白骨壤种群的遗传多样性和遗传分化 .结果表明 ,不同生境的白骨壤种群维持着较高的遗传多样性 ,观察杂合度为 0 .35 0 ,预期杂合度为 0 .2 5 9.不同生境的白骨壤种群的遗传分化很低 ,种群间的遗传分化为FST=0 .0 6 2 ,表明总的遗传变异中有 93.8%来自种群内 .基因流顺畅 ,Nm=3.78.种群间的遗传一致度和遗传距离分别为 0 .95 5和 0 .0 46The genetic variation and genetic differentiation were investigated in Avicennia marina populations in sandy soil and slity soil in Guangxi. It showed that Avicennia marina populatioin in different habitats maintained relatively high level of genetic variation, observed heterozygosity was 0.350, and expected heterozygosity was 0.259; genetic differentiation in Avicennia marina population in different habitats was low, F ST =0.062, which showed that among total heterozygosity, 93.8% came from intar populations, the genetic distance and genetic identity between population was 0.046 and 0.955 respectively, gene flow was smooth, which was 3.78.[WT5F1]国家教育部博士学科点专项科研基金资助项目!(19990 38410
