Comparative Tests of Species-Genetic Diversity Correlations in Neutral and Non-neutral Loci in Four Species of Stream Insect
Comparative Tests of Species-Genetic Diversity Correlations in Neutral and Non-neutral Loci in Four Species of Stream Insect
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四种溪流昆虫中性和非中性位点的物种遗传多样性相关性比较试验
DOI：
10.1111/evo.13261
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发表时间：
2017
期刊：
影响因子：
3.3
通讯作者：
Kozo Watanabe and Michael T Monaghan
中科院分区：
文献类型：
--
作者：
Zhang;J.;Q. Liu;and L. Bai;山田太造;Kozo Watanabe and Michael T Monaghan
联系种群遗传学和群落生态学的一个基本问题是适应过程（例如，自然选择）和中性过程（例如，漂移-迁移平衡）是物种遗传多样性相关性（SGDC）的基础。在这里，我们结合联合收割机基因组扫描和离群位点检测与社区分析，分别测试中性和非中性SGDC在四种溪流昆虫。我们在日本的60个地方进行了采样，并研究了种群AFLP带丰富度（Br），总群落（S）和营养行会（Str）的类群丰富度之间的关系，以及15个栖息地参数，可能会推动适应和影响丰富度。只有在群落的优势种中，中性溴与S呈显著正相关，当种内竞争明显时，中性溴可能受到抑制。NonneutralBr与Strin相关，该物种仅限于高海拔地区，生境异质性最高。在中性和非中性位点上，两个物种的群落距离与遗传距离（β-SGDC）相关。基于距离的冗余分析发现，地理隔离和海拔驱动社区和人口的分歧。这表明，中性和适应性的分歧发生在两个层次的多样性，通过地理隔离和当地适应的共同影响。
A fundamental question linking population genetics and community ecology is how adaptive processes (e.g., natural selection) and neutral processes (e.g., drift-migration equilibrium) underpin the species-genetic diversity correlation (SGDC). Here, we combine genome scans and outlier loci detection with community analysis to separately test for neutral and nonneutral SGDCs in four species of stream insect. We sampled 60 localities in Japan and examined the relationships among population AFLP band richness (Br), taxon richness of the total community (S) and of the trophic guild (Str), and 15 habitat parameters that could potentially drive adaptation and influence richness. NeutralBrwas positively correlated withSonly in the dominant species of these communities, suggestingBrmay be constrained when intraspecific competition is pronounced. NonneutralBrwas correlated withStrin a species restricted to high elevations where habitat heterogeneity was highest. Community distance and genetic distance (β-SGDC) was correlated in two of the four species at both neutral and nonneutral loci. Distance-based redundancy analysis found geographic isolation and elevation to drive divergence of both communities and populations. This suggests that both neutral and adaptive divergence occurred through the shared influences of geographic isolation and local adaptation at the two levels of diversity.