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Genetic differentiation among populations of the blackfin goodea Goodea atripinnis (Cyprinodontiformes: Goodeidae): Implications for its evolutionary history
Journal of Fish Biology ( IF 1.7 ) Pub Date : 2021-01-13 , DOI: 10.1111/jfb.14654
Rosa Gabriela Beltrán‐López 1, 2 , Omar Domínguez‐Domínguez 3, 4 , Kyle R. Piller 5 , Humberto Mejía‐Mojica 2 , Adán Fernando Mar‐Silva 3, 6 , Ignacio Doadrio 7
Affiliation  

Central Mexico is characterized by a complex topography that is the result of historic and contemporary tectonic and climatic factors. These events have influenced the evolutionary history of numerous freshwater fishes in the region. However, recent studies have demonstrated that life history traits and ecological characteristics of species may influence dispersal capabilities and the degree of genetic connectivity. Goodea (Cyprinodontiformes: Goodeidae) is one of the most widely distributed and environmentally tolerant genera of goodeids. We analyzed variation in the mitochondrial Cytochrome b gene to evaluate the phylogeographic relationships, genetic structure, genetic diversity, and demographic history of Goodea from across its distribution range. We found low genetic differentiation and identified shared haplotypes among several regions. Geographic segregation was found in samples southwest and northeast of the Lower Lerma region, with some internal isolated groups showing phylogeographic differentiation and unique haplotypes. The AMOVA best explained genetic structure when grouped by haplogroups rather than when grouped by recognized biogeographic regions. Several regions showed null genetic diversity, raising the possibly of dispersal mediated by humans. Finally, Bayesian Skyline Plot (BSP) analysis showed a population expansion for the Southwest haplogroup, except for the Armería population and subgroup II of the Northeast haplogroup. All this suggests a recent colonization of Goodea throughout some of the biogeographic regions currently inhabited by this species.

中文翻译:

blackfin goodea Goodea atripinnis (Cyprinodontiformes: Goodeidae) 种群之间的遗传分化:对其进化历史的影响

墨西哥中部的特点是复杂的地形,这是历史和当代构造和气候因素的结果。这些事件影响了该地区众多淡水鱼类的进化史。然而,最近的研究表明,物种的生活史特征和生态特征可能会影响传播能力和遗传连通程度。Goodea (Cyprinodontiformes: Goodeidae) 是分布最广、环境耐受性最差的古德科属之一。我们分析了线粒体细胞色素 b 基因的变异,以评估 Goodea 分布范围内的系统地理学关系、遗传结构、遗传多样性和人口统计学历史。我们发现低遗传分化并确定了几个区域之间的共享单倍型。在下莱尔马地区西南和东北部的样本中发现了地理隔离,一些内部孤立的群体显示出系统地理分化和独特的单倍型。当按单倍群而不是按公认的生物地理区域分组时,AMOVA 最好地解释了遗传结构。几个地区显示出无效的遗传多样性,增加了由人类介导的传播的可能性。最后,贝叶斯天际线图 (BSP) 分析显示西南单倍群的种群扩张,除了 Armería 种群和东北单倍群的亚群 II。所有这些都表明古地亚最近在该物种目前居住的一些生物地理区域中进行了殖民。一些内部孤立的群体显示出系统地理分化和独特的单倍型。当按单倍群而不是按公认的生物地理区域分组时,AMOVA 最好地解释了遗传结构。几个地区显示出无效的遗传多样性,增加了由人类介导的传播的可能性。最后,贝叶斯天际线图 (BSP) 分析显示西南单倍群的种群扩张,除了 Armería 种群和东北单倍群的亚群 II。所有这些都表明古地亚最近在该物种目前居住的一些生物地理区域中进行了殖民。一些内部孤立的群体显示出系统地理分化和独特的单倍型。当按单倍群而不是按公认的生物地理区域分组时,AMOVA 最好地解释了遗传结构。几个地区显示出无效的遗传多样性,增加了由人类介导的传播的可能性。最后,贝叶斯天际线图 (BSP) 分析显示西南单倍群的种群扩张,除了 Armería 种群和东北单倍群的亚群 II。所有这些都表明古地亚最近在该物种目前居住的一些生物地理区域中进行了殖民。几个地区显示出无效的遗传多样性,增加了由人类介导的传播的可能性。最后,贝叶斯天际线图 (BSP) 分析显示西南单倍群的种群扩张,除了 Armería 种群和东北单倍群的亚群 II。所有这些都表明古地亚最近在该物种目前居住的一些生物地理区域中进行了殖民。几个地区显示出无效的遗传多样性,增加了由人类介导的传播的可能性。最后,贝叶斯天际线图 (BSP) 分析显示西南单倍群的种群扩张,除了 Armería 种群和东北单倍群的亚群 II。所有这些都表明古地亚最近在该物种目前居住的一些生物地理区域中进行了殖民。
更新日期:2021-01-13
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