GENE FREQUENCY COMPARISONS BETWEEN SUNFISH (CENTRARCHIDAE) POPULATIONS AT VARIOUS STAGES OF EVOLUTIONARY DIVERGENCE
GENE FREQUENCY COMPARISONS BETWEEN SUNFISH (CENTRARCHIDAE) POPULATIONS AT VARIOUS STAGES OF EVOLUTIONARY DIVERGENCE
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太阳鱼（正鱼科）种群在进化分化不同阶段的基因频率比较
DOI：
10.1093/sysbio/26.3.319
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发表时间：
1977
期刊：
影响因子：
--
通讯作者：
Michael H. Smith
中科院分区：
文献类型：
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作者：
J. Avise;Michael H. Smith
Avise，J. C.和M. H.史密斯（格鲁吉亚大学动物学系，雅典，GA 30602）1977年。太阳鱼（Centrarchidae）种群在进化分歧的各个阶段的基因频率比较。《动物系统》，26：319-335。在属于Centrarchidae的北美太阳鱼的20个分类群中，共检测了11-15个编码酶和其他蛋白质的遗传位点。系统分类学家在这些分类群中识别出四个进化分化阶段。我们已经确定了在这些阶段中的每个阶段的种群之间的平均遗传分化水平，D：地理种群，D = 0.024 + 0.003;亚种，D - 0.171 + 0.004;种，D = 0.626 + 0.028;属，D = 1.340 + 0.064。D估计了从一个共同祖先分离的群体以来每个基因座积累的遗传学上可检测的密码子替换的数量。在进化分歧的各个阶段，中头类动物之间的平均遗传距离急剧增加。不同亚种的Lepomis macrochirus表现出约8倍的地理种群属于一个亚种的遗传距离。蓝腹鱼属的物种在近50%的基因座上的等位基因组成是完全不同的，平均来说，尽管它们有能力产生可行的，有时是可育的杂交种。属于不同的Centrarchid属的物种积累了一个以上的等位基因取代每个位点，平均。在centralarchids前合子生殖隔离障碍可能已经发展显着的后合子隔离机制。尽管如此，平均水平的遗传分化centrarchid类群之间的相似，其他动物类群的相应级别的特点是不同模式的生殖隔离。数量和模式的遗传分化推断可能的进化关系Centrarchidae之间。大量的进化信息包含在相对较少的基因中。[电泳;遗传距离;翻车鱼; Centrarchidae。]
Avise, J. C. and M. H. Smith (Department of Zoology, University of Georgia, Athens, GA 30602) 1977. Gene frequency comparisons between sunfish (Centrarchidae) populations at various stages of evolutionary divergence. Syst. Zool. 26:319-335.-A total of 11-15 genetic loci encoding enzymes and other proteins has been assayed in populations belonging to 20 taxa of the North American sunfish in the family Centrarchidae. Four stages of evolutionary divergence are recognized among these taxa by systematists. We have determined mean levels of genetic differentiation, D, between populations at each of these stages: geographic populations, D = 0.024 + 0.003; subspecies, D - 0.171 + 0.004; species, D = 0.626 + 0.028; genera, D = 1.340 + 0.064. D estimates the number of electrophoretically detectable codon substitutions per locus accumulated since populations separated from a common ancestor. Mean genetic distance among centrarchids increases dramatically through the various stages of evolutionary divergence. Different subspecies of Lepomis macrochirus exhibit about an 8-fold increase in genetic distance over geographic populations belonging to a subspecies. Species of the genus Lepomis are completely distinct in allelic composition at nearly 50 percent of loci, on the average, despite their ability to produce viable and sometimes fertile hybrids. Species belonging to different centrarchid genera have accumulated more than one allelic substitution per locus, on the average. Among the centrarchids prezygotic reproductive isolating barriers may have preceded the development of significant postzygotic isolating mechanisms. Nonetheless, mean levels of genetic divergence between centrarchid taxa are similar to those other animal taxa of corresponding rank characterized by different modes of reproductive isolation. Amounts and patterns of genetic divergence are employed to infer probable evolutionary relationships among the Centrarchidae. A great deal of evolutionary information is contained within even a relatively small number of genes. [Electrophoresis; genetic distance; sunfish; Centrarchidae.]