Transcriptome‐based phylogeny of endemic Lake Baikal amphipod species flock: fast speciation accompanied by frequent episodes of positive selection
Rattachement africain : ru, ca, us. Niveau de preuve : code pays fourni par la source.
Le résumé fourni par la source
Endemic species flocks inhabiting ancient lakes, oceanic islands and other long-lived isolated habitats are often interpreted as adaptive radiations. Yet molecular evidence for directional selection during species flocks radiation is scarce. Using partial transcriptomes of 64 species of Lake Baikal (Siberia, Russia) endemic amphipods and two nonendemic outgroups, we report a revised phylogeny of this species flock and analyse evidence for positive selection within the endemic lineages. We confirm two independent invasions of amphipods into Baikal and demonstrate that several morphological features of Baikal amphipods, such as body armour and reduction in appendages and sensory organs, evolved in several lineages in parallel. Radiation of Baikal amphipods has been characterized by short phylogenetic branches and frequent episodes of positive selection which tended to be more frequent in the early phase of the second invasion of amphipods into Baikal when the most intensive diversification occurred. Notably, signatures of positive selection are frequent in genes encoding mitochondrial membrane proteins with electron transfer chain and ATP synthesis functionality. In particular, subunits of both the membrane and substrate-level ATP synthases show evidence of positive selection in the plankton species Macrohectopus branickii, possibly indicating adaptation to active plankton lifestyle and to survival under conditions of low temperature and high hydrostatic pressures known to affect membranes functioning. Other functional categories represented among genes likely to be under positive selection include Ca-binding muscle-related proteins, possibly indicating adaptation to Ca-deficient low mineralization Baikal waters.
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Le contrôle bibliographique ouvert
DOI retrouvé dans Crossref DOI retrouvé ; titre concordant.
- Titre Crossref
- Transcriptome‐based phylogeny of endemic Lake Baikal amphipod species flock: fast speciation accompanied by frequent episodes of positive selection
- Date Crossref
- 01/01/2017
- Éditeur
- Wiley
- Type
- journal-article
Ce recoupement confirme des métadonnées liées au DOI. Il ne confirme ni la méthode ni les conclusions de l’étude, et il ne compte pas comme une seconde source scientifique indépendante.
Où se fait cette recherche
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Lomonosov Moscow State University Belozersky Institute of Physico-Chemical Biology pays non établi dans la noticeUniversité ou école supérieure
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Hospital for Sick Children Genetics and Genome Biology Program pays non établi dans la noticeÉtablissement de santé
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Institute for Information Transmission Problems pays non établi dans la noticeStructure de recherche
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Pirogov Russian National Research Medical University pays non établi dans la noticeUniversité ou école supérieure
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Skolkovo Institute of Science and Technology pays non établi dans la noticeUniversité ou école supérieure
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Russian Academy of Sciences pays non établi dans la noticeOrganisme public
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Baikal State University pays non établi dans la noticeUniversité ou école supérieure
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All-Russian Research Institute Fisheries and Oceanography pays non établi dans la noticeStructure de recherche
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Koltzov Institute of Developmental Biology pays non établi dans la noticeStructure de recherche
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University of Michigan Department of Ecology and Evolution pays non établi dans la noticeUniversité ou école supérieure
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East Tennessee State University Department of Biological Sciences pays non établi dans la noticeUniversité ou école supérieure
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Irkutsk Research Center Baikal Museum pays non établi dans la noticeStructure de recherche
Belozersky Institute of Physico-Chemical Biology — Lomonosov Moscow State University, Genetics and Genome Biology Program — Hospital for Sick Children et Institute for Information Transmission Problems, avec 9 autres affiliations.
Une affiliation ne permet pas de déduire la nationalité d’un auteur.