Intraspecific phylogeographic isolation of Arabian Gulf sailfish Istiophorus platypterus inferred from mitochondrial DNA
Intraspecific phylogeographic isolation of Arabian Gulf sailfish Istiophorus platypterus inferred from mitochondrial DNA
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从线粒体 DNA 推断阿拉伯湾旗鱼 Istiophorus platypterus 的种内系统发育地理分离
DOI：
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发表时间：
2004
期刊：
影响因子：
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通讯作者：
J. Benzie
中科院分区：
文献类型：
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作者：
J. Hoolihan;J. Premanandh;M.;J. Benzie
7旗鱼Istiophorus platypterus人口抽样从3个地点内和4个地点外的阿拉伯湾的遗传结构进行了测定的限制性片段长度多态性分析的线粒体DNA的147个人使用8种限制性内切酶。来自27个假定限制性位点的总共39个复合单倍型显示了海湾内外人群之间频率的显著差异（分子方差分析34.80%，P<0.001; FST=0.356）和它们之间限制迁移的证据（平均迁移人数，Nm=0.903）。单倍型发现只有内部或外部的海湾聚集到所有主要分支的单倍型单倍型基因组，因为那些发现在这两个领域。海湾人口的遗传多样性减少，以及人口群体之间的差异，而不是单倍型之间的分歧单倍型频率的差异，这一事实表明，创始人效应和最近从印度洋的基因型抽样。这可能与大约8,000年前最后一次冰川期结束后，由于海平面上升而被洪水淹没后扩散到海湾有关。从那时起，在某个时候，种群已经进化到在海湾内完成其生命周期，并显示出明显的基因流中断，与霍尔木兹海峡的扩散数据一致。这些研究结果代表了第一个明确的证据，在一个大的，高度流浪，掠夺istiophorid长嘴鱼，在边缘海的地理隔离发生。
The genetic structure of seven sailfish Istiophorus platypterus populations sampled from three locations inside and four locations outside the Arabian Gulf was determined by restriction fragment length polymorphism analysis of mitochondrial DNA of 147 individuals using eight restriction endonucleases. A total of 39 composite haplotypes derived from 27 presumptive restriction sites demonstrated significant differences in frequency between population groups inside and outside the Gulf (analysis of molecular variance 34.80%, P<0.001; FST=0.356) and evidence of restricted migration between them (average number of migrants, Nm=0.903). Haplotypes found only inside or outside the Gulf clustered to all major branches of a haplotype phylogeny, as did those found in both areas. The reduced genetic diversity of the Gulf populations and the fact that much of the differentiation between the population groups resulted from differences in haplotype frequency rather than divergence between haplotypes suggest a founder effect and a recent sampling of genotypes from the Indian Ocean. This was probably associated with dispersal into the Gulf after it was flooded by rising sea level after the end of the last glaciation around 8,000 years ago. At some point since then the population has evolved to complete its life cycle within the Gulf and shows a marked disruption to gene flow, consistent with dispersal data, at the Strait of Hormuz. These findings represent the first clear evidence of phylogeographic isolation occurring in a large, highly vagile, predatory istiophorid billfish, within a marginal sea.
影响因子：
3.3
作者：
M. Nei;F. Tajima
通讯作者：
M. Nei;F. Tajima