PoplarV1, Main, Exploration, bibRecord, 000C31

The role of interspecific hybridization in adaptive potential at range margins.

Identifieur interne : 000C31 ( Main/Exploration ); précédent : 000C30; suivant : 000C32

The role of interspecific hybridization in adaptive potential at range margins.

Auteurs : Quentin C. Cronk [Canada] ; Adriana Suarez-Gonzalez [Canada]

Source :

Molecular ecology [ 1365-294X ] ; 2018.

RBID : pubmed:30562841

Descripteurs français

KwdFr :
- Génétique des populations (MeSH), Hybridation d'acides nucléiques (MeSH), Hybridation génétique (MeSH), Populus (génétique), Évolution biologique (MeSH).
MESH :
- génétique : Populus.
- Génétique des populations, Hybridation d'acides nucléiques, Hybridation génétique, Évolution biologique.

English descriptors

KwdEn :
- Biological Evolution (MeSH), Genetics, Population (MeSH), Hybridization, Genetic (MeSH), Nucleic Acid Hybridization (MeSH), Populus (genetics).
MESH :
- genetics : Populus.
- Biological Evolution, Genetics, Population, Hybridization, Genetic, Nucleic Acid Hybridization.

Abstract

Is interspecific hybridization an ordinary part of species biology? And if so, how evolutionarily important is it? These questions have been discussed in the botanical literature, in one form or another, at least since J.P. Lotsy early in the last century. He coined the term syngameon, now defined as "a group of otherwise distinct species interconnected by limited gene exchange, i.e. the most inclusive interbreeding evolutionary unit" (Suarez-Gonzalez, Lexer, & Cronk, Biology Letters, 14, 20170688, ). North American poplars (Populus, Salicaceae) form one such syngameon. In this issue of Molecular Ecology, a new study (Chhatre, Evans, DiFazio, & Keller, Molecular Ecology, 27, ) uses three species from the North American poplar syngameon to tackle the twin issues of (a) the extent of gene exchange and (b) the significance of this gene exchange to the biology of these trees. They demonstrate that a hybrid zone exists where the ranges of Populus angustifolia and Populus balsamifera overlap in the Rocky Mountains, and postulate that this hybridization may facilitate population survival at the range edges. Indeed, the authors show that a remarkable number of loci are introgressing under selection. Very remarkably, they detect additional hybridity (making a trihybrid zone) with Populus trichocarpa (a species that does not occur in the area). Intriguingly, there is some genomic evidence of ancient introgression events. This suggests a model of episodic species divergence and hybridization, in which the syngameon is dynamic and behaving as a supraspecific metapopulation over geological time.

DOI: 10.1111/mec.14927
PubMed: 30562841

Affiliations:

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Le document en format XML

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<front><div type="abstract" xml:lang="en">Is interspecific hybridization an ordinary part of species biology? And if so, how evolutionarily important is it? These questions have been discussed in the botanical literature, in one form or another, at least since J.P. Lotsy early in the last century. He coined the term syngameon, now defined as "a group of otherwise distinct species interconnected by limited gene exchange, i.e. the most inclusive interbreeding evolutionary unit" (Suarez-Gonzalez, Lexer, & Cronk, Biology Letters, 14, 20170688, ). North American poplars (Populus, Salicaceae) form one such syngameon. In this issue of Molecular Ecology, a new study (Chhatre, Evans, DiFazio, & Keller, Molecular Ecology, 27, ) uses three species from the North American poplar syngameon to tackle the twin issues of (a) the extent of gene exchange and (b) the significance of this gene exchange to the biology of these trees. They demonstrate that a hybrid zone exists where the ranges of Populus angustifolia and Populus balsamifera overlap in the Rocky Mountains, and postulate that this hybridization may facilitate population survival at the range edges. Indeed, the authors show that a remarkable number of loci are introgressing under selection. Very remarkably, they detect additional hybridity (making a trihybrid zone) with Populus trichocarpa (a species that does not occur in the area). Intriguingly, there is some genomic evidence of ancient introgression events. This suggests a model of episodic species divergence and hybridization, in which the syngameon is dynamic and behaving as a supraspecific metapopulation over geological time.</div>
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The role of interspecific hybridization in adaptive potential at range margins.

The role of interspecific hybridization in adaptive potential at range margins.

Source :

Descripteurs français

English descriptors

Abstract

Links toward previous steps (curation, corpus...)

Le document en format XML

Pour manipuler ce document sous Unix (Dilib)

Pour mettre un lien sur cette page dans le réseau Wicri

Pour générer des pages wiki