Species delimitation and geography.
genetic distance
geographical distance
isolation by distance
species delineation
taxonomy
Journal
Molecular ecology resources
ISSN: 1755-0998
Titre abrégé: Mol Ecol Resour
Pays: England
ID NLM: 101465604
Informations de publication
Date de publication:
Jul 2020
Jul 2020
Historique:
received:
05
12
2019
revised:
29
04
2020
accepted:
01
05
2020
pubmed:
10
5
2020
medline:
5
6
2021
entrez:
9
5
2020
Statut:
ppublish
Résumé
Despite the importance of the geographical arrangement of populations for the inference of species boundaries, only a few approaches that integrate spatial information into species delimitation have thus far been developed. Persistent differentiation of sympatric groups of individuals is the best criterion for species status. Species delimitation becomes more prone to error if allopatric metapopulations are considered because it is often difficult to assess whether observed differences between allopatric metapopulations would be sufficient to prevent the fusion of these metapopulations upon contact. We propose a novel approach for testing the hypothesis that the multilocus genetic distances between individuals or populations belonging to two different candidate species are not larger than expected based on their geographical distances and the relationship of genetic and geographical distances within the candidate species. A rejection of this null hypothesis is an argument for classifying the two studied candidate species as distinct species. Case studies show that the proposed tests are suitable to distinguish between intra- and interspecific differentiation. The regression approach proposed here is more appropriate for testing species hypotheses with regard to isolation by distance than (partial) Mantel tests. Our tests assume a linear relationship between genetic and (transformed) geographical distances. This assumption can be compromised by a high genetic variability within populations as found in a case study with microsatellite markers.
Identifiants
pubmed: 32384204
doi: 10.1111/1755-0998.13184
doi:
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Pagination
950-960Subventions
Organisme : Deutsche Forschungsgemeinschaft
ID : HA 2763/6-1
Informations de copyright
© 2020 The Authors. Molecular Ecology Resources published by John Wiley & Sons Ltd.
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