Limnological Institute, Siberian Branch, Russian Academy of Sciences, Irkutsk, Russia.
Mol Phylogenet Evol. 2010 Jul;56(1):336-42. doi: 10.1016/j.ympev.2010.04.001. Epub 2010 Apr 9.
Sympatric speciation was studied in two sister species of cottoid fish from Lake Baikal (East Siberia): big golomyanka or Big Baikal oilfish (Comephorus baicalensis Pallas, 1776) and small golomyanka or Little Baikal oilfish (C. dybowski Korotneff, 1905). Analysis of nucleotide sequences of mitochondrial cytochrome b gene showed that the Little Baikal oilfish (LBO) formed a single population in the lake, whereas the Big Baikal oilfish (BBO) was divided into two genetic groups - BBOI and BBOII, which were not separated geographically. Phylogenetic analysis showed that BBO is a more ancient species than LBO and that the paraphyletic origin of LBO is from the BBO genetic lineage within the genus Comephorus. Population-genetic structure and phylogenetic relationships between the two golomyanka species are considered to be a consequence of paleoenvironmental events that took place in the Baikal region during the past hundreds of thousand years.
本研究以贝加尔湖（东西伯利亚）两种拟沙丁鱼姐妹种为研究对象，探讨了同域物种形成现象，这两种拟沙丁鱼分别为大高体雅罗鱼（Comephorus baicalensis Pallas, 1776）和小体雅罗鱼（C. dybowskii Korotneff, 1905）。对线粒体细胞色素 b 基因的核苷酸序列分析表明，小体雅罗鱼在该湖中形成了一个单一群体，而大高体雅罗鱼则分为两个遗传群体——BBOI 和 BBOII，这两个群体在地理上并未分开。系统发育分析表明，BBO 比 LBO 更为古老，并且 LBO 的并系起源于 Comephorus 属内的 BBO 遗传谱系。这两种拟沙丁鱼的种群遗传结构和系统发育关系被认为是过去数十万年来贝加尔地区古环境事件的结果。
Zotero 插件