Neutral and adaptive loci reveal fine-scale population structure in Eleginops maclovinus from North Patagonia

Patagonia is an understudied area, especially when it comes to population genomic studies with relevance to fishery management. However, the dynamic and heterogeneous landscape in this area can harbor important but cryptic genetic population structure. Once such information is revealed, it can be integrated into the management of infrequently investigated species. Eleginops maclovinus is a protandrous hermaphrodite species with economic importance for local communities that is currently managed as a single genetic unit. In this study, we sampled five locations distributed across a salinity cline from Northern Patagonia to investigate the genetic population structure of E. maclovinus. We use Restriction-site Associated DNA (RAD) sequencing and outlier tests to obtain 11,712 neutral, 338 adaptive loci, and 78 loci associated to environmental variables. We identified a spatial pattern of structuration with gene flow and spatial selection by environmental association. Neutral and adaptive l...

巴塔哥尼亚（Patagonia）是研究程度较低的区域，在与渔业管理相关的群体基因组学研究领域尤为如此。该区域的动态异质景观可能蕴藏着重要却隐蔽的遗传群体结构。这类信息一旦被揭示，便可被纳入对研究较少物种的管理工作中。马氏裸南极鱼（Eleginops maclovinus）是一种雄性先熟雌雄同体物种，对当地社区具有经济价值，目前被作为单一遗传单元进行管理。本研究从巴塔哥尼亚北部沿盐度梯度布设了5个采样点，以探究马氏裸南极鱼的遗传群体结构。我们采用限制性酶切位点相关DNA（Restriction-site Associated DNA, RAD）测序技术与离群位点检测方法，共获得11712个中性位点、338个适应性位点以及78个与环境变量相关的位点。我们鉴定出了受基因流与环境关联空间选择共同作用的群体结构空间格局。中性位点与适应性位点……