Cargando…

Asymmetric hybridization in Cordulegaster (Odonata: Cordulegastridae): Secondary postglacial contact and the possible role of mechanical constraints

Two Cordulegaster dragonflies present in Italy, the Palaearctic and northern distributed Cordulegaster boltonii and the endemic to the south of the peninsula Cordulegaster trinacriae, meet in central Italy and give rise to individuals of intermediate morphology. By means of mitochondrial and nuclear...

Descripción completa

Detalles Bibliográficos
Autores principales: Solano, Emanuela, Hardersen, Sönke, Audisio, Paolo, Amorosi, Valentina, Senczuk, Gabriele, Antonini, Gloria
Formato: Online Artículo Texto
Lenguaje:English
Publicado: John Wiley and Sons Inc. 2018
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6202705/
https://www.ncbi.nlm.nih.gov/pubmed/30386565
http://dx.doi.org/10.1002/ece3.4368
_version_ 1783365734051610624
author Solano, Emanuela
Hardersen, Sönke
Audisio, Paolo
Amorosi, Valentina
Senczuk, Gabriele
Antonini, Gloria
author_facet Solano, Emanuela
Hardersen, Sönke
Audisio, Paolo
Amorosi, Valentina
Senczuk, Gabriele
Antonini, Gloria
author_sort Solano, Emanuela
collection PubMed
description Two Cordulegaster dragonflies present in Italy, the Palaearctic and northern distributed Cordulegaster boltonii and the endemic to the south of the peninsula Cordulegaster trinacriae, meet in central Italy and give rise to individuals of intermediate morphology. By means of mitochondrial and nuclear markers and of Geometric Morphometrics applied to sexual appendages, we defined i) the geographical boundaries between the two species in Italy and ii) we determined the presence, the extent, and the genetic characteristics of the hybridization. Genetic data evidenced asymmetric hybridization with the males of C. trinacriae able to mate both interspecifically and intraspecifically. The results contrast with expectations under neutral gene introgression and sexual selection. This data, along with the morphological evidence of significant differences in size and shape of sexual appendages between the males of the two species, seem indicative of the role of mechanical constraints in intraspecific matings. The origin of the two species is dated about to 1.32 Mya and the hybridization resulted related to range expansion of the two species after Last Glacial Maximum and this led to the secondary contact between the two taxa in central Italy. At last, our results indicate that the range of C. trinacriae, a threatened and protected species, has been moving northward probably driven by climate changes. As a result, the latter species is currently intruding into the range of C. boltonii. The hybrid area is quite extended and the hybrids seem well adapted to the environment. From a conservation point of view, even if C. trinacriae has a strong genetic identity, the discovery of hybridization between the two species should be considered in a future species management.
format Online
Article
Text
id pubmed-6202705
institution National Center for Biotechnology Information
language English
publishDate 2018
publisher John Wiley and Sons Inc.
record_format MEDLINE/PubMed
spelling pubmed-62027052018-11-01 Asymmetric hybridization in Cordulegaster (Odonata: Cordulegastridae): Secondary postglacial contact and the possible role of mechanical constraints Solano, Emanuela Hardersen, Sönke Audisio, Paolo Amorosi, Valentina Senczuk, Gabriele Antonini, Gloria Ecol Evol Original Research Two Cordulegaster dragonflies present in Italy, the Palaearctic and northern distributed Cordulegaster boltonii and the endemic to the south of the peninsula Cordulegaster trinacriae, meet in central Italy and give rise to individuals of intermediate morphology. By means of mitochondrial and nuclear markers and of Geometric Morphometrics applied to sexual appendages, we defined i) the geographical boundaries between the two species in Italy and ii) we determined the presence, the extent, and the genetic characteristics of the hybridization. Genetic data evidenced asymmetric hybridization with the males of C. trinacriae able to mate both interspecifically and intraspecifically. The results contrast with expectations under neutral gene introgression and sexual selection. This data, along with the morphological evidence of significant differences in size and shape of sexual appendages between the males of the two species, seem indicative of the role of mechanical constraints in intraspecific matings. The origin of the two species is dated about to 1.32 Mya and the hybridization resulted related to range expansion of the two species after Last Glacial Maximum and this led to the secondary contact between the two taxa in central Italy. At last, our results indicate that the range of C. trinacriae, a threatened and protected species, has been moving northward probably driven by climate changes. As a result, the latter species is currently intruding into the range of C. boltonii. The hybrid area is quite extended and the hybrids seem well adapted to the environment. From a conservation point of view, even if C. trinacriae has a strong genetic identity, the discovery of hybridization between the two species should be considered in a future species management. John Wiley and Sons Inc. 2018-09-14 /pmc/articles/PMC6202705/ /pubmed/30386565 http://dx.doi.org/10.1002/ece3.4368 Text en © 2018 The Authors. Ecology and Evolution published by John Wiley & Sons Ltd. This is an open access article under the terms of the http://creativecommons.org/licenses/by/4.0/ License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.
spellingShingle Original Research
Solano, Emanuela
Hardersen, Sönke
Audisio, Paolo
Amorosi, Valentina
Senczuk, Gabriele
Antonini, Gloria
Asymmetric hybridization in Cordulegaster (Odonata: Cordulegastridae): Secondary postglacial contact and the possible role of mechanical constraints
title Asymmetric hybridization in Cordulegaster (Odonata: Cordulegastridae): Secondary postglacial contact and the possible role of mechanical constraints
title_full Asymmetric hybridization in Cordulegaster (Odonata: Cordulegastridae): Secondary postglacial contact and the possible role of mechanical constraints
title_fullStr Asymmetric hybridization in Cordulegaster (Odonata: Cordulegastridae): Secondary postglacial contact and the possible role of mechanical constraints
title_full_unstemmed Asymmetric hybridization in Cordulegaster (Odonata: Cordulegastridae): Secondary postglacial contact and the possible role of mechanical constraints
title_short Asymmetric hybridization in Cordulegaster (Odonata: Cordulegastridae): Secondary postglacial contact and the possible role of mechanical constraints
title_sort asymmetric hybridization in cordulegaster (odonata: cordulegastridae): secondary postglacial contact and the possible role of mechanical constraints
topic Original Research
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6202705/
https://www.ncbi.nlm.nih.gov/pubmed/30386565
http://dx.doi.org/10.1002/ece3.4368
work_keys_str_mv AT solanoemanuela asymmetrichybridizationincordulegasterodonatacordulegastridaesecondarypostglacialcontactandthepossibleroleofmechanicalconstraints
AT hardersensonke asymmetrichybridizationincordulegasterodonatacordulegastridaesecondarypostglacialcontactandthepossibleroleofmechanicalconstraints
AT audisiopaolo asymmetrichybridizationincordulegasterodonatacordulegastridaesecondarypostglacialcontactandthepossibleroleofmechanicalconstraints
AT amorosivalentina asymmetrichybridizationincordulegasterodonatacordulegastridaesecondarypostglacialcontactandthepossibleroleofmechanicalconstraints
AT senczukgabriele asymmetrichybridizationincordulegasterodonatacordulegastridaesecondarypostglacialcontactandthepossibleroleofmechanicalconstraints
AT antoninigloria asymmetrichybridizationincordulegasterodonatacordulegastridaesecondarypostglacialcontactandthepossibleroleofmechanicalconstraints