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在邻近二个着生在弃耕地上的湿地松林分中,通过对其8个多态同功酶位点的等位基因频率的研究,分析了湿地松林分的群体遗传结构。分别以成熟林和中龄林代表不同世代的亲本。亲代林分包含3个龄级,每个龄级的4个异型酶位点的等位基因频率存在显著差异,但林分间的差异印不显著。在子代林分内,无论是龄级或林分间均没有遗传上的差异。尽管2个林分间等位基因频率无差异,但群体遗传结构不一样说明了连续世代间的某些遗传结构存在变异,这种变异的结构类型能在局部地区存在。试明了2个林分内的近交率是低水平的。
In the vicinity of two wetland pine forests planted on abandoned farmland, the population genetic structure of Pinus elliottii was analyzed through the allele frequencies of eight polymorphic isozymes. Mature forest and middle-aged forest, respectively, on behalf of different generations of parents. The parental stand contains three age classes, and there are significant differences in the allele frequencies of the four heterotypic enzyme loci at each age class, but the difference between the stands is not significant. Within the offspring, there is no genetic difference between age groups or stand. Although there is no difference in the allele frequency between the two stands, the genetic structure of the population is not the same as that of some genetic structures among successive generations. The structure type of this variation can exist in some areas. It was proved that inbreeding rate in the two stands was low.