Evolutionary history of the land snail Helix aspersa in the Western Mediterranean: preliminary results inferred from mitochondrial DNA sequences
Evolutionary history of the land snail Helix aspersa in the Western Mediterranean: preliminary results inferred from mitochondrial DNA sequences
复制标题
DOI：
10.1046/j.1365-294x.2001.01145.x
复制
发表时间：
2001-01-01
影响因子：
4.9
通讯作者：
Deunff, J
中科院分区：
文献类型：
--
作者：
Guiller, A;Coutellec-Vreto, MA;Deunff, J
种内遗传地理学方法提供了一种研究种群间遗传交换历史的手段。作为研究的一部分，在西地中海的Hatlaspersa的历史，我们进行了系统发育分析的线粒体核糖体大亚基（16S）基因的部分序列的基础上。我们的样品包括31 H。a.来自北非的aspersa种群以前调查的解剖和生化特征。为了阐明亚种间的关系，对H. a.还研究了最大值。在H的分裂过程中，所推断的分子遗传学与以前的结果基本一致。a. aspersa单倍型分为东部和西部组。H. a. maxima单倍型形成在H之前出现的第三谱系。a. aspersa集团。分歧的血统之间的时间估计表明，在更新世冰期和vicariance事件由于上新世在地中海西部的地质变化的分散可能都发挥了重要作用，在建立目前的范围H aspersa。
Intraspecific phylogeographic methods provide a means of examining the history of genetic exchange among populations. As part of a study of the history of Helix aspersa in the Western Mediterranean, we performed a phylogenetic analysis based on partial sequences of the mitochondrial large ribosomal subunit (16S) gene. Our samples include 31 H. a. aspersa populations from North Africa previously investigated for anatomical and biochemical characters. To clarify subspecific relationships, three individuals of the subspecies H. a. maxima were also studied. The molecular phylogeny inferred agrees largely with previous results, in splitting H. a. aspersa haplotypes into an eastern and a western group. H. a. maxima haplotypes form a third lineage arising before the H. a. aspersa groups. Divergence times estimated between the lineages suggest that dispersal during Pleistocene glaciation and vicariance events due to Pliocene geological changes in the western Mediterranean may both have played a significant part in the establishment of the present range of H aspersa.