Population structure and historical demography of the thorny skate (Amblyraja radiata, Rajidae) in the North Atlantic
Population structure and historical demography of the thorny skate (Amblyraja radiata, Rajidae) in the North Atlantic
复制标题
北大西洋刺鳐（Amblyraja radiata，Rajidae）的种群结构和历史人口统计
DOI：
--
复制
发表时间：
2007
期刊：
影响因子：
--
通讯作者：
J. Olsen
中科院分区：
文献类型：
--
作者：
Malia Chevolot;P. Wolfs;J. Palsson;A. Rijnsdorp;W. Stam;J. Olsen
对来自纽芬兰、冰岛、挪威、卡特加特群岛和北海中部的300只带刺溜冰(Amblyraja Radiata)的种群遗传结构进行了调查。用SSCP方法首次筛选到mt细胞色素b基因的290个碱基片段。SSCP单倍型序列共有34个单倍型，其中14个为冰岛独有，3个为纽芬兰独有，1个为挪威独有，3个为卡特加特独有。全球首次公开募股虽然疲软，但意义重大。去掉分化最严重的两个Kattegat位置，没有导致显著的遗传分化。单倍型多样性高且均匀分布于整个大西洋(h=0.80)，北海除外(h=0.48)。统计上的简约揭示了一个具有中心分布的单倍型的明星般的家谱。随后的嵌套分支分析导致了邻近扩张的推断，并有证据表明纽芬兰和冰岛之间存在远距离扩散。历史人口分析显示，多刺溜冰鞋的数量从110万年前到69万年前开始经历了指数级的增长；而最后一次冰川盛期显然没有什么影响。这些结果与对棘背射线(Raja Clavata)的平行研究有很大不同，在该研究中可以识别出清晰的结构和以前的避难区。尽管这两个物种具有相似的生活史特征和重叠的活动范围，但大陆架边缘显然不会像棒状大麦那样对放射虫的迁徙构成障碍。
Population genetic structure of the thorny skate (Amblyraja radiata) was surveyed in >300 individuals sampled from Newfoundland, Iceland, Norway, the Kattegat and the central North Sea. A 290-bp fragment of the mt cytochrome-b gene was first screened by SSCP. Sequences of SSCP haplotypes revealed 34 haplotypes, 14 of which were unique to Iceland, 3 to Newfoundland, 1 to Norway and 3 to the Kattegat. The global FST was weak but significant. Removal of the two Kattegat locations, which were the most differentiated, resulted in no significant genetic differentiation. Haplotype diversity was high and evenly distributed across the entire Atlantic (h = 0.8) with the exception of the North Sea (h = 0.48). Statistical parsimony revealed a star-like genealogy with a central widespread haplotype. A subsequent nested clade analysis led to the inference of contiguous expansion with evidence for long distance dispersal between Newfoundland and Iceland. Historical demographic analysis showed that thorny skates have undergone exponential population expansion that started between 1.1 million and 690,000 years ago; and that the Last Glacial Maximum apparently had little effect. These results strongly differ from those of a parallel study of the thornback ray (Raja clavata) in which clear structure and former refugial areas could be identified. Although both species have similar life history traits and overlapping ranges, the continental shelf edge apparently does not present a barrier to migration in A. radiata, as it does for R. clavata.
登录
查看更多内容
影响因子：
3.3
作者：
Alan R. Templeton;K. Crandall;C. Sing
通讯作者：
Alan R. Templeton;K. Crandall;C. Sing
影响因子：
3.3
作者：
Yunxin Fu
通讯作者：
Yunxin Fu
迁移、突变和漂移下的细胞器基因多样性：平衡预期、平衡方法、异质细胞的影响以及与核基因的比较。
影响因子：
3.3
作者：
BirkyJr,CW;Fuerst,P;Maruyama,T
通讯作者：
Maruyama,T
将种群结构与种群历史分离：对虎蝾螈 Ambystoma tigrinum 线粒体 DNA 单倍型地理分布的分支分析。
影响因子：
3.3
作者：
Templeton,AR;Routman,E;Phillips,CA
通讯作者：
Phillips,CA
对表型关联与从限制性内切核酸酶作图推断的单倍型进行分支分析。
影响因子：
3.3
作者：
Templeton,AR;Sing,CF
通讯作者：
Sing,CF