Unravelling plant diversification: Intraspecific genetic differentiation in hybridizing Anacyclus species in the western Mediterranean Basin
EntityUAM. Departamento de Biología
10.1002/ajb2.16121American Journal of Botany 110.2 (2023): e16121
ISSN0002-9122 (print); 1537-2197 (online)
Funded byPID2019‐104135GB‐I00, PID2021‐124187NB‐I00
ProjectGobierno de España. PID2019-104135GB-I00; Gobierno de España. PID2021‐124187NB‐I00
SubjectsMediterranean Basin; Coexistence; Dicotyledon; Genetic Differentiation; Introgression; Niche Overlap; Biología y Biomedicina / Biología
Rights© 2022 The Authors
Esta obra está bajo una licencia de Creative Commons Reconocimiento-NoComercial 4.0 Internacional.
Premise: The interfertile species Anacyclus clavatus, A. homogamos, and A. valentinus represent a plant complex coexisting in large anthropic areas of the western Mediterranean Basin with phenotypically mixed populations exhibiting a great floral variation. The goal of this study was to estimate the genetic identity of each species, to infer the role of hybridization in the observed phenotypic diversity, and to explore the effect of climate on the geographic distribution of species and genetic clusters. Methods: We used eight nuclear microsatellites to genotype 585 individuals from 31 populations of three Anacyclus species for population genetic analyses by using clustering algorithms based on Bayesian models and ordination methods. In addition, we used ecological niche models and niche overlap analyses for both the species and genetic clusters. We used an expanded data set, including 721 individuals from 129 populations for ecological niche models of the genetic clusters. Results: We found a clear correspondence between species and genetic clusters, except for A. clavatus that included up to three genetic clusters. We detected individuals with admixed genetic ancestry in A. clavatus and in mixed populations. Ecological niche models predicted similar distributions for species and genetic clusters. For the two specific genetic clusters of A. clavatus, ecological niche models predicted remarkably different areas. Conclusions: Gene flow between Anacyclus species likely explains phenotypic diversity in contact areas. In addition, we suggest that introgression could be involved in the origin of one of the two A. clavatus genetic clusters, which also showed ecological differentiation
Google Scholar:Bruno Agudo, A. - Xavier Picó, F. - García Mateo, Rubén - Marcer, Arnald - Torices Blanco, Rubén - Álvarez, Inés
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