The population genomics of multiple tsetse fly (Glossina fuscipes fuscipes) admixture zones in Uganda.
The population genomics of multiple tsetse fly (Glossina fuscipes fuscipes) admixture zones in Uganda.
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DOI：
10.1111/mec.14957
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发表时间：
2019-01
影响因子：
4.9
通讯作者：
Caccone, Adalgisa
中科院分区：
文献类型：
--
作者：
Saarman, Norah P.;Opiro, Robert;Hyseni, Chaz;Echodu, Richard;Opiyo, Elizabeth A.;Dion, Kirstin;Johnson, Thomas;Aksoy, Serap;Caccone, Adalgisa
理解执行、维持或逆转物种形成过程的机制是进化生物学的一个重要挑战。本研究探讨了分歧的模式，并讨论了形成和维持不同的谱系的采采蝇Glossina fuscipes fuscipes在乌干达的过程。我们采样251苍蝇从18个站点跨越已知的遗传谱系和它们之间的四个混合区。我们应用人口基因组学，杂交区和近似贝叶斯计算分析三种类型的遗传标记：55,267双消化限制性内切酶位点相关DNA（ddRAD）SNP，以评估全基因组的混合物，16个微卫星，以提供连续性与已发表的数据和准确的电泳建模，和线粒体细胞色素氧化酶I和II的491 bp片段，以推断母系遗传模式。混合区对应于受乌干达河流网络重组影响的地区，这些重组发生在过去几十万年西非裂谷系形成期间。由于采采蝇种群分布是由河流定义的，混合区可能代表了旧的和新的二次接触区域。我们的研究结果表明，旧的混合区主要包含父母的类型，而年轻的区域包含可变的混合类型产生多代杂交。这些结果表明，生殖障碍几乎完全在老年人的混合区，而几乎没有在年轻的混合区。研究结果是一致的混合区理论的预测：人口在区域的二次接触过渡迅速从早期到晚期阶段的物种形成或崩溃。
Understanding the mechanisms that enforce, maintain or reverse the process of speciation is an important challenge in evolutionary biology. This study investigates the patterns of divergence and discusses the processes that form and maintain divergent lineages of the tsetse fly Glossina fuscipes fuscipes in Uganda. We sampled 251 flies from 18 sites spanning known genetic lineages and the four admixture zones between them. We apply population genomics, hybrid zone and approximate Bayesian computation to the analysis of three types of genetic markers: 55,267 double-digest restriction site-associated DNA (ddRAD) SNPs to assess genome-wide admixture, 16 microsatellites to provide continuity with published data and accurate biogeographic modelling, and a 491-bp fragment of mitochondrial cytochrome oxidase I and II to infer maternal inheritance patterns. Admixture zones correspond with regions impacted by the reorganization of Uganda's river networks that occurred during the formation of the West African Rift system over the last several hundred thousand years. Because tsetse fly population distributions are defined by rivers, admixture zones likely represent both old and new regions of secondary contact. Our results indicate that older hybrid zones contain mostly parental types, while younger zones contain variable hybrid types resulting from multiple generations of interbreeding. These findings suggest that reproductive barriers are nearly complete in the older admixture zones, while nearly absent in the younger admixture zones. Findings are consistent with predictions of hybrid zone theory: Populations in zones of secondary contact transition rapidly from early to late stages of speciation or collapse all together.
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影响因子：
4.9
作者：
Bouyer, J.;Balenghien, T.;De Meeus, T.
通讯作者：
De Meeus, T.
影响因子：
0.8
作者：
Carmichael, J.
通讯作者：
Carmichael, J.
影响因子：
1.1
作者：
Collins, Michael M.;Rawlins, John E.
通讯作者：
Rawlins, John E.
影响因子：
5.8
作者：
Cornuet, Jean-Marie;Pudlo, Pierre;Estoup, Arnaud
通讯作者：
Estoup, Arnaud
DOI：
10.1111/j.2517-6161.1995.tb02031.x
发表时间：
1995-01-01
影响因子：
5.8
作者：
BENJAMINI, Y;HOCHBERG, Y
通讯作者：
HOCHBERG, Y