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首页> 外文期刊>Scandinavian Journal of Forest Research >Allozyme variation in Korean populations of Taxus cuspidata (Taxaceae).
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Allozyme variation in Korean populations of Taxus cuspidata (Taxaceae).

机译：韩国红豆杉（Taxaceae）种群的同工酶变异。

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摘要

The genetic diversity and structure was examined of 6 populations of Taxus cuspidata from the Korea Republic, by analysing 23 putative loci from 11 enzyme systems in foliage samples from each population. Although the populations are isolated and (mostly) located at over 1000 m altitude, the results showed that they maintain moderate levels of alloenzyme variation (average polymorphic loci 45%, mean number of alleles per locus 1.78, mean expected heterozygosity 0.192) compared with species of similar life history and ecological traits. In addition, the Korean populations harbour slightly higher levels of genetic diversity than populations of T. brevifolia in the western USA and Canada. A considerable, high level of heterozygote deficiency was observed in Korean populations of T. cuspidata (mean FIS 0.299). Although significant heterogeneity in allele frequency were detected between populations at all 12 polymorphic loci (p <0.01 at Per-2 and p <0.001 at others), among-population genetic differentiation accounted for 5.6% of the total variation. Indirect estimates of the number of migrants per generation (Nm) (4.22, calculated from GST; 6.02, calculated from the mean frequency of 4 private alleles) indicate that gene flow is extensive among Koreanpopulations of T. cuspidata. It is suggested that factors such as obligatory outcrossing (the species is dioecious), high fecundity, long generation times, ability to regenerate by stump sprouting, and occasional seed dispersal by birds may contribute to the moderate levels of genetic diversity within populations and low alloenzyme divergence among populations of T. cuspidata.
机译：通过分析每个种群的叶子样本中11个酶系统的23个推定基因座，检查了大韩民国6个东北红豆杉种群的遗传多样性和结构。尽管种群是孤立的，并且（大多）位于海拔超过1000 m处，但结果表明，与物种相比，它们保持中等水平的同工酶变异水平（平均多态位点为45％，每个位点的等位基因平均数为1.78，平均预期杂合度为0.192）。相似的生活史和生态特征。另外，在美国西部和加拿大，朝鲜族人群的遗传多样性水平略高于短叶锥虫。在朝鲜虎杖种群中观察到相当高的杂合子缺陷水平（平均FIS 0.299）。尽管在所有12个多态性基因座的种群之间均检测到等位基因频率的显着异质性（在Per-2处p <0.01，在其他2个处p <0.001），但群体间的遗传分化占总变异的5.6％。间接估计每代移民的数量（Nm）（根据GST计算为4.22;根据4个私人等位基因的平均频率计算为6.02）表明，在韩国虎杖种群中，基因流广泛。建议诸如强制性异交（该物种是雌雄异体），高繁殖力，长生代，通过树桩萌芽再生的能力以及鸟类偶尔散播种子等因素可能有助于种群中遗传多样性的中等水平和同化酶低虎杖种群之间的差异。

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