Local environmental selection and lineage admixture act as significant mechanisms in the adaptation of the widespread East Asian pond skaterGerris latiabdoministo heterogeneous landscapes

作者：Zhen Ye, Juanjuan Yuan, Ya-Hui Zhen, Jakob Damgaard, Kazutaka Yamada, Xiuxiu Zhu, Kun Jiang, Xin Yang, Wenwu Wang, Shujing Wang, Jingyu Liang, Siying Fu, Pingping Chen, Wenjun Bu · 发表于：Journal of Biogeography · 年份：2020 · DOI：10.1111/jbi.13774 · 被引用次数：18 · 研究领域：Identification and Quantification in Food、Fish Ecology and Management Studies、Wildlife Ecology and Conservation

Abstract Aim Local environmental selection and lineage admixture have long been accepted as important adaptive mechanisms in adjusting widespread taxa to new environments. We studied a pond skater, Gerris latiabdominis , to explore the relative roles played by these two mechanisms in its process of adaptation to heterogeneous landscapes. Location East Asia. Taxon Gerris latiabdominis Miyamoto, 1958. Methods Mitochondrial (COI, COII) and nuclear (ddRAD‐seq) markers were sequenced from 202 individuals. Phylogenetic and phylogeographical analyses were conducted to reveal the population genetic structure. The demographical history was simulated by approximate Bayesian computation (ABC). The single‐nucleotide polymorphisms (SNPs) that may have been subjected to natural divergent selection among the populations were assessed, and the recent migration rates were estimated. Finally, shifts in suitable habitat from the last interglacial (LIG) to the present were predicted through ecological niche modelling (ENM). Results We found population structures inferred from both mitochondrial and nuclear genomes to be almost coincident and to correspond to temporal or spatial heterogeneity. The early Pliocene splitting event between the northern (NO) and southeastern (SE) groups is consistent with the ‘arid belt hypothesis’, followed by local environmental selection. Approximate Bayesian computation and gene flow estimation strongly suggested that the southwestern (SW) groups originated from a...