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首页> 外文期刊>Journal of Experimental Marine Biology and Ecology >Genetic population structure of the mangrove snails Littoraria subvittata and L pallescens in the Western Indian Ocean
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Genetic population structure of the mangrove snails Littoraria subvittata and L pallescens in the Western Indian Ocean

机译：西部印度洋西部海洋植物卵巢卵巢卵巢卵巢植物区的遗传人口结构

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摘要

Littoraria snails are an important component of the food chain in the mangrove ecosystem. This study intends to examine the influence of the Western Indian Ocean currents and isolation-by-distance (IBD) on the genetic diversity and structure of Littoraria subvittata and Littoraria pallescens, which are the most dominant species of Littoraria along the East African coast. A fragment of the mitochondrial COI gene from 334 individuals of L. subvittata and 134 of L. pallescens collected from mangroves sites in Kenya, Tanzania, Mozambique and Madagascar, was used in the analysis. Low values of nucleotide diversity (L. subvittata: 0.13 +/- 0.10%, L. pallescens: 0.12 +/- 0.00%) and high to moderate haplotype diversity (L. subvittata: 0.57 +/- 0.03, L. pallescens: 0.55 +/- 0.05) were recorded for both species. An analysis of molecular variances (AMOVA) detected a significant genetic difference among populations of L. subvittata (Phi(st): 0.093, P .001) and was supported by significant IBD, while L. pallescens showed panmixia ((Phi(st): 0.004, P .05). The spatial analysis of molecular variance (SAMOVA) did not detect population clusters in L. subvittata. In contrast, SAMOVA revealed slight but significant genetic structuring between two groups of populations in L. pallescens. These results may indicate that L. subvittata is sensitive to impacts of population geographic IBD compared to L. pallescens. The differences in genetic structure of populations between the two species may be linked to their larval potential differences in crossing the oceanic barriers such as currents and eddies during dispersal.
机译：Littoraria蜗牛是红树林生态系统中食品链的重要组成部分。本研究打算探讨西印度洋电流和近距离近距离（IBD）对Littoraria subvittata和Littoraria钯的遗传多样性和结构的影响，这是东非海岸最大的Littoraria最占主导地位的物种。在分析中，使用了从肯尼亚，坦桑尼亚，莫桑比克和马达加斯加的红松座位收集的334个患者的L.Subvitta和134个中L.Subnvitta和134个钯。核苷酸多样性的低值（L. subvittata：0.13 +/- 0.10％，L.Pallescens：0.12 +/- 0.00％）和高于中等单倍型多样性（L. subvitta：0.57 +/- 0.03，L.Pallescens：0.55两种物种都记录了+/- 0.05）。分子差异（Amova）检测L. subvitta（Phi（st）：0.093，p <.001）的群体中的显着遗传差异，并得到了显着的IBD，而L.Pallescens展示了攀纹（（PHI（ST） ）：0.004，p> .05）。分子方差的空间分析（Samova）未检测到L. subvitta的群体簇。相比之下，Samova揭示了两组群体在L.Pallescens的群体之间略微但重要的遗传结构。这些结果可能表明，与L. Pallescens相比，L. subvitta对人口地理IBD的影响敏感。两种物种之间群体遗传结构的差异可能与流过电流和漩涡等海洋屏障的幼虫潜在差异相关联在分散期间。

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