Genomic basis of the loss of diadromy in Galaxias maculatus : Insights from reciprocal transplant experiments
Rattachement africain : ca, cl. Niveau de preuve : code pays fourni par la source.
Le résumé fourni par la source
Diadromy is known for having major effects on the distribution and richness of aquatic species, and so does its loss. The loss of diadromy has led to the diversification of many species, yet research focusing on understanding its molecular basis and consequences are limited. This is particularly true for amphidromous species despite being the most abundant group of diadromous species. Galaxias maculatus, an amphidromous species and one of the most widely distributed fishes in the Southern Hemisphere, exhibits many instances of nonmigratory or resident populations. The existence of naturally replicated resident populations in Patagonia can serve as an ideal system for the study of the mechanisms that lead to the loss of the diadromy and its ecological and evolutionary consequences. Here, we studied two adjacent river systems in which resident populations are genetically differentiated yet derived from the same diadromous population. By combining a reciprocal transplant experiment with genomic data, we showed that the two resident populations followed different evolutionary pathways by exhibiting a differential response in their capacity to survive in salt water. While one resident population was able to survive salt water, the other was not. Genomic analyses provided insights into the genes that distinguished (a) migratory from nonmigratory populations; (b) populations that can vs those that cannot survive a saltwater environment; and (c) between these resident populations. This study demonstrates that the loss of diadromy can be achieved by different pathways and that environmental (selection) and random (genetic drift) forces shape this dynamic evolutionary process.
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Le contrôle bibliographique ouvert
DOI retrouvé dans Crossref DOI retrouvé, mais le titre doit être comparé manuellement.
- Titre Crossref
- Genomic basis of the loss of diadromy in <i>Galaxias maculatus</i> : Insights from reciprocal transplant experiments
- Date Crossref
- 04/11/2020
- 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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Dalhousie University Department of Biology pays non établi dans la noticeUniversité ou école supérieure
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University of Concepción pays non établi dans la noticeUniversité ou école supérieure
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Centro de Ciencias Ambientales EULA-Chile de la Universidad de Concepción pays non établi dans la noticeStructure de recherche
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Millennium Institute of Oceanography pays non établi dans la noticeStructure de recherche
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Departamento de Sistemas Acuáticos Facultad de Ciencias Ambientales y Centro EULA Universidad de Concepción Concepción Chile pays non établi dans la noticeInstitution
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Departamento de Zoología Facultad de Ciencias Naturales y Oceanográficas Universidad de Concepción Concepción Chile pays non établi dans la noticeInstitution
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Instituto Milenio de Oceanografía (IMO) Universidad de Concepción Concepción Chile pays non établi dans la noticeStructure de recherche
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Departamento de Ingeniería Civil Facultad de Ingeniería Universidad de Concepción Concepción Chile pays non établi dans la noticeInstitution
Department of Biology — Dalhousie University, University of Concepción et Centro de Ciencias Ambientales EULA-Chile de la Universidad de Concepción, avec 5 autres affiliations.
Une affiliation ne permet pas de déduire la nationalité d’un auteur.