Malhi Ripan S, Rhett Gillian, Bell Alison M
Trace Genetics, Inc (a DNAPrint Genomics Company), 4655 Meade St., Suite 300, Richmond, CA 94804, USA.
Mol Phylogenet Evol. 2006 Jul;40(1):148-54. doi: 10.1016/j.ympev.2006.02.019. Epub 2006 Apr 17.
In this study, we analyzed the cytochrome b gene in threespine stickleback (Gasterosteus aculeatus) populations from Scotland. We found evidence of a postglacial population expansion in Scotland and large differences in genetic diversity estimates among populations. Higher levels of genetic diversity are negatively correlated with distance from the ocean. In addition, distance from the ocean and predation risk both explain variation in plate count in Scottish populations. Overall, the mtDNA data support the racemic model of evolution in threespine stickleback.
在本研究中，我们分析了来自苏格兰的三刺鱼（Gasterosteus aculeatus）种群中的细胞色素b基因。我们发现了苏格兰冰期后种群扩张的证据，以及种群间遗传多样性估计值的巨大差异。较高水平的遗传多样性与距海洋的距离呈负相关。此外，距海洋的距离和捕食风险都解释了苏格兰种群中骨板数量的变化。总体而言，线粒体DNA数据支持三刺鱼的外消旋进化模型。
