Deep divergence among mitochondrial lineages in African jackals
Deep divergence among mitochondrial lineages in African jackals
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DOI：
10.1111/zsc.12257
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发表时间：
2018-01-01
影响因子：
2.5
通讯作者：
Zinner, Dietmar
中科院分区：
文献类型：
--
作者：
Atickem, Anagaw;Stenseth, Nils Chr.;Zinner, Dietmar
最近，分子分析表明，非洲和欧亚金豺是不同的物种。这一发现建议对其他非洲犬科成员的系统发育关系和分类进行重新调查。本文利用线粒体细胞色素b （cytb）基因的962 bp序列，对非洲豺群中mesomelas Lupulella和L. adusta的系统发育关系进行了研究。根据其不间断的分布（一个种群在非洲东部，另一个种群在非洲南部），我们发现了两个线粒体谱系，它们大约在250万年前分化（Ma）。相比之下，在分布较连续的撒哈拉以南非洲地区，除了西非种群与中非和东非种群在1.4 Ma左右出现分化外，我们发现adusta的遗传多样性较浅。例如，灰狼（Canis lupus）和非洲金狼（C. lupaster）之间的分化年龄都要早于110万年至90万年。我们的研究结果的一个分类学意义可能是，这两个种群有资格获得物种地位。然而，需要有足够地理采样的全基因组数据来证实我们的结果。
Recently, molecular analyses revealed that African and Eurasian golden jackals are distinct species. This finding suggests re-investigation of the phylogenetic relationships and taxonomy of other African members of the Canidae. Here, we provide a study on the phylogenetic relationship between populations of African jackals Lupulella mesomelas and L. adusta inferred from 962 bp of the mitochondrial cytochrome b (cytb) gene. As expected from its disjunct distribution, with one population in eastern Africa and the other one in southern Africa, we found two mitochondrial lineages within L. mesomelas, which diverged about 2.5 million years ago (Ma). In contrast, in L. adusta with its more continuous distribution in sub-Saharan Africa, we found only a shallower genetic diversification, with the exception of the West African population, which diverged around 1.4 Ma from the Central and East African populations. Both divergence ages are older than, for example the 1.1-0.9 million years between the grey wolf Canis lupus and the African golden wolf C. lupaster. One taxonomic implication of our findings might be that the two L. mesomelas populations warrant species status. However, genome-wide data with adequate geographical sampling are needed to substantiate our results.