Introgressive hybridization represents one of the long-lasting debated genetic consequences of species range expansion. Mitochondrial DNA has been shown to heavily introgress between interbreeding animal species that meet in new sympatric areas and, often, asymmetric introgression from local to the colonizing populations has been observed. Disentangling among the evolutionary and ecological processes that might shape this pattern remains difficult, because they continuously act across time and space. In this context, long-term studies can be of paramount importance. Here, we investigated the dynamics of mitochondrial introgression between two mosquito species (Aedes mariae and Ae. zammitii ) during a colonization event that started in 1986 after a translocation experiment. By analyzing 1,659 individuals across 25 years, we showed that introgression occurred earlier and at a higher frequency in the introduced than in the local species, showing a pattern of asymmetric introgression. Throughout time, introgression increased slowly in the local species, becoming reciprocal at most sites. The rare opportunity to investigate the pattern of introgression across time during a range expansion along with the characteristics of our study-system allowed us to support a role of demographic dynamics in determining the observed introgression pattern.

Dynamics of mtDNA introgression during species range expansion. Insights from an experimental longitudinal study / Mastrantonio, Valentina; Porretta, Daniele; Urbanelli, Sandra; Crasta, Graziano; Nascetti, G.. - In: SCIENTIFIC REPORTS. - ISSN 2045-2322. - ELETTRONICO. - 6:(2016), pp. 1-8. [10.1038/srep30355]

Dynamics of mtDNA introgression during species range expansion. Insights from an experimental longitudinal study

MASTRANTONIO, VALENTINA
;
PORRETTA, DANIELE
;
URBANELLI, Sandra;CRASTA, Graziano;
2016

Abstract

Introgressive hybridization represents one of the long-lasting debated genetic consequences of species range expansion. Mitochondrial DNA has been shown to heavily introgress between interbreeding animal species that meet in new sympatric areas and, often, asymmetric introgression from local to the colonizing populations has been observed. Disentangling among the evolutionary and ecological processes that might shape this pattern remains difficult, because they continuously act across time and space. In this context, long-term studies can be of paramount importance. Here, we investigated the dynamics of mitochondrial introgression between two mosquito species (Aedes mariae and Ae. zammitii ) during a colonization event that started in 1986 after a translocation experiment. By analyzing 1,659 individuals across 25 years, we showed that introgression occurred earlier and at a higher frequency in the introduced than in the local species, showing a pattern of asymmetric introgression. Throughout time, introgression increased slowly in the local species, becoming reciprocal at most sites. The rare opportunity to investigate the pattern of introgression across time during a range expansion along with the characteristics of our study-system allowed us to support a role of demographic dynamics in determining the observed introgression pattern.
2016
speciation; reproductive isolation; character displacement; mitochondrial DNA
01 Pubblicazione su rivista::01a Articolo in rivista
Dynamics of mtDNA introgression during species range expansion. Insights from an experimental longitudinal study / Mastrantonio, Valentina; Porretta, Daniele; Urbanelli, Sandra; Crasta, Graziano; Nascetti, G.. - In: SCIENTIFIC REPORTS. - ISSN 2045-2322. - ELETTRONICO. - 6:(2016), pp. 1-8. [10.1038/srep30355]
File allegati a questo prodotto
File Dimensione Formato  
Mastrantonio_Dynamics-of-mtDNA_2016.pdf

accesso aperto

Tipologia: Versione editoriale (versione pubblicata con il layout dell'editore)
Licenza: Creative commons
Dimensione 717.72 kB
Formato Adobe PDF
717.72 kB Adobe PDF

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/877336
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 33
  • ???jsp.display-item.citation.isi??? 34
social impact