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Title: | Genetic homogeneity, lack of larvae recruitment, and clonality in absence of females across western Mediterranean populations of the starfish Coscinasterias tenuispina. |
Author: | Pérez Portela, Rocío Garcia-Cisneros, Alex Campos-Canet, Marta Palacín Cabañas, Cruz |
Keywords: | Mediterrània occidental Estrelles de mar Reproducció asexual Genètica de poblacions Western Mediterranean Starfishes Asexual reproduction Population Genetics |
Issue Date: | 19-Aug-2021 |
Publisher: | Nature Publishing Group |
Abstract: | We here analysed the populations' genetic structure of Coscinasterias tenuispina, an AtlanticMediterranean fssiparous starfsh, focusing on the western Mediterranean, to investigate: the distribution and prevalence of genetic variants, the relative importance of asexual reproduction, connectivity across the Atlantic-Mediterranean transition, and the potential recent colonisation of the Mediterranean Sea. Individuals from 11 Atlantic-Mediterranean populations of a previous study added to 172 new samples from fve new W Mediterranean sites. Individuals were genotyped at 12 microsatellite loci and their gonads histologically analysed for sex determination. Additionally, four populations were genotyped at two-time points. Results demonstrated genetic homogeneity and low clonal richness within the W Mediterranean, due to the dominance of a superclone, but large genetic divergence with adjacent areas. The lack of new genotypes recruitment over time, and the absence of females, confrmed that W Mediterranean populations were exclusively maintained by fssion and reinforced the idea of its recent colonization. The existence of diferent environmental conditions among basins and/or density-depend processes could explain this lack of recruitment from distant areas. The positive correlation between clonal richness and heterozygote excess suggests that most genetic diversity is retained within individuals in the form of heterozygosity in clonal populations, which might increase their resilience. |
Note: | Reproducció del document publicat a: https://doi.org/10.1038/s41598-021-96331-6 |
It is part of: | Scientific Reports, 2021, vol. 11, p. 16819 |
URI: | http://hdl.handle.net/2445/186063 |
Related resource: | https://doi.org/10.1038/s41598-021-96331-6 |
ISSN: | 2045-2322 |
Appears in Collections: | Articles publicats en revistes (Biologia Evolutiva, Ecologia i Ciències Ambientals) |
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