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Appears in Collections:Biological and Environmental Sciences Journal Articles
Peer Review Status: Refereed
Title: Hybridization and hybrid speciation under global change
Author(s): Vallejo-Marín, Mario
Hiscock, Simon J
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Keywords: alien
genome duplication
global change
invasive species
reproductive isolation
Issue Date: Sep-2016
Date Deposited: 5-Jul-2016
Citation: Vallejo-Marín M & Hiscock SJ (2016) Hybridization and hybrid speciation under global change. New Phytologist, 211 (4), pp. 1170-1187.
Abstract: An unintended consequence of global change is an increase in opportunities for hybridization among previously isolated lineages. Here we illustrate how global change can facilitate the breakdown of reproductive barriers and the formation of hybrids, drawing on the flora of the British Isles for insight. Although global change may ameliorate some of the barriers preventing hybrid establishment, for example by providing new ecological niches for hybrids, it will have limited effects on environment-independent post-zygotic barriers. For example, genic incompatibilities and differences in chromosome numbers and structure within hybrid genomes are unlikely to be affected by global change. We thus speculate that global change will have a larger effect on eroding pre-zygotic barriers (eco-geographical isolation and phenology) than post-zygotic barriers, shifting the relative importance of these two classes of reproductive barriers from what is usually seen in naturally produced hybrids where pre-zygotic barriers are the largest contributors to reproductive isolation. Although the long-term fate of neo-hybrids is still to be determined, the massive impact of global change on the dynamics and distribution of biodiversity generates an unprecedented opportunity to study large numbers of unpredicted, and often replicated, hybridization ‘experiments’, allowing us to peer into the birth and death of evolutionary lineages.
DOI Link: 10.1111/nph.14004
Rights: This item has been embargoed for a period. During the embargo please use the Request a Copy feature at the foot of the Repository record to request a copy directly from the author. You can only request a copy if you wish to use this work for your own research or private study. This is the peer reviewed version of the following article: Vallejo-Marín, M. and Hiscock, S. J. (2016), Hybridization and hybrid speciation under global change. New Phytol, 211: 1170–1187. doi:10.1111/nph.14004, which has been published in final form at This article may be used for non-commercial purposes in accordance With Wiley Terms and Conditions for self-archiving.

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