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Hybridization and hybrid zone stability between two lizards explained by population genetics and niche quantification
Zoological Journal of the Linnean Society ( IF 2.8 ) Pub Date : 2020-03-21 , DOI: 10.1093/zoolinnean/zlaa018 Imanol Cabaña 1 , Margarita Chiaraviglio 1 , Valeria Di Cola 2 , Antoine Guisan 2, 3 , Olivier Broennimann 2, 3 , Cristina N Gardenal 1 , Paula C Rivera 1, 4
Zoological Journal of the Linnean Society ( IF 2.8 ) Pub Date : 2020-03-21 , DOI: 10.1093/zoolinnean/zlaa018 Imanol Cabaña 1 , Margarita Chiaraviglio 1 , Valeria Di Cola 2 , Antoine Guisan 2, 3 , Olivier Broennimann 2, 3 , Cristina N Gardenal 1 , Paula C Rivera 1, 4
Affiliation
Understanding the factors that affect hybridization is an important issue in the study of species evolution. In this work, we analyse the genetic structure of two lizard species, Salvator merianae and Salvator rufescens, at a microscale within a climatic niche analysis framework, to reveal the main factors that contribute to the stability of their hybrid zone. We assess the effect of climate in hybridization by quantifying and decomposing the niche overlap of both species. Using a mitochondrial and a nuclear marker, we find that hybridization is frequent and is not restricted to the sympatric region. The gene flow is mainly from S. rufescens to S. merianae, with introgression into the range of S. merianae. Also, S. merianae would have long been present in the area, while S. rufescens appears to be a recent colonizer. The climate contributes to the population structure of S. merianae, but not to that of S. rufescens. The niches occupied by S. rufescens in the hybrid zone and the non-hybrid zone are similar, while the niches of S. merianae are different. Our results do not fit previous models of hybrid zone stability, suggesting the need to develop new models that consider the evolutionary factors that can differentially affect parental species and hybrids.
中文翻译:
种群遗传学和生态位定量解释了两只蜥蜴之间的杂交和杂交区稳定性
了解影响杂交的因素是物种进化研究中的重要问题。在这项工作中,我们在气候生态位分析框架内,在微观尺度上分析了两个蜥蜴物种Salvator merianae和Salvator rufescens的遗传结构,以揭示影响其杂交区稳定性的主要因素。我们通过量化和分解两个物种的生态位重叠来评估气候对杂交的影响。使用线粒体和核标记,我们发现杂交是频繁的并且不限于同伴区域。基因流主要从红景天链霉菌到梅里亚链球菌,并渗入梅里亚链球菌的范围。同样,该地区早就存在梅里亚链霉菌,而黑麦链霉菌似乎是最近的殖民者。气候对梅里亚沙门氏菌的种群结构有贡献,但对rufescens则没有影响。杂色链球菌在杂种区和非杂种区所占据的生态位相似,而链霉菌的生态位则不同。我们的结果与先前的杂种区稳定性模型不符,表明需要开发新模型来考虑可能差异影响亲本物种和杂种的进化因素。
更新日期:2020-03-30
中文翻译:
种群遗传学和生态位定量解释了两只蜥蜴之间的杂交和杂交区稳定性
了解影响杂交的因素是物种进化研究中的重要问题。在这项工作中,我们在气候生态位分析框架内,在微观尺度上分析了两个蜥蜴物种Salvator merianae和Salvator rufescens的遗传结构,以揭示影响其杂交区稳定性的主要因素。我们通过量化和分解两个物种的生态位重叠来评估气候对杂交的影响。使用线粒体和核标记,我们发现杂交是频繁的并且不限于同伴区域。基因流主要从红景天链霉菌到梅里亚链球菌,并渗入梅里亚链球菌的范围。同样,该地区早就存在梅里亚链霉菌,而黑麦链霉菌似乎是最近的殖民者。气候对梅里亚沙门氏菌的种群结构有贡献,但对rufescens则没有影响。杂色链球菌在杂种区和非杂种区所占据的生态位相似,而链霉菌的生态位则不同。我们的结果与先前的杂种区稳定性模型不符,表明需要开发新模型来考虑可能差异影响亲本物种和杂种的进化因素。