Unidirectional hybridization at a species' range boundary: implications for habitat tracking

Gemma, E. Beatty; Marianne Philipp; Jim Provan

doi:10.1111/j.1472-4642.2009.00616.x

Unidirectional hybridization at a species' range boundary: implications for habitat tracking

Gemma, E. Beatty, Marianne Philipp, Jim Provan

Ecology and Evolution

Publikation: Bidrag til tidsskrift › Tidsskriftartikel › Forskning › peer review

34 Citationer (Scopus)

Abstract

Udgivelsesdato: January 2010

Originalsprog	Engelsk
Tidsskrift	Diversity and Distributions-a Journal of Biological Invasions and Biodiversity
Vol/bind	16
Udgave nummer	1
Sider (fra-til)	1-9
ISSN	1366-9516
DOI	https://doi.org/10.1111/j.1472-4642.2009.00616.x
Status	Udgivet - 2010

Bibliografisk note

KEYWORDS
Genetic assimilation • hybridization • introgression • Pyrola grandiflora • Pyrola minor • range-edge

Adgang til dokumentet

10.1111/j.1472-4642.2009.00616.x

Citationsformater

@article{7cefab4047a211df928f000ea68e967b,

title = "Unidirectional hybridization at a species' range boundary: implications for habitat tracking",

abstract = "Aim Introgressive hybridization between a locally rare species and a more abundant congener can drive population extinction via genetic assimilation, or the replacement of the rare species gene pool with that of the common species. To date, however, few studies have assessed the effects of such processes at the limits of species' distribution ranges. In this study, we have examined the potential for hybridization between range-edge populations of the wintergreen Pyrola minor and sympatric populations of Pyrola grandiflora.Location Qeqertarsuaq, Greenland and Churchill, Manitoba, Canada.Methods Genetic analysis of samples from Greenland and Canada was carried out using a combination of nuclear and chloroplast single nucleotide polymorphisms (SNPs).Results Analysis of nuclear SNPs confirmed hybridization in populations of morphologically intermediate individuals, as well as revealing the existence of cryptic hybrids in ostensibly morphologically pure P. minor populations. Analysis of chloroplast SNPs revealed that this hybridization is unidirectional and suggests that hybrids originate via pollen swamping of P. minor by the more common P. grandiflora.Main conclusions Extensive unidirectional hybridization may lead to the extinction of peripheral populations of P. minor where the two species grow sympatrically. Extinction could occur as a result of genetic assimilation where F1s are fertile, or via the removal of unidirectionally pollinated sterile F1s, or by a combination of these processes. This could compromise the ability of species to respond to climate change via habitat tracking, although the final outcome of these processes may ultimately depend on the rate of global climate change and its effect on the species' distributions.",

author = "Beatty, {Gemma, E.} and Marianne Philipp and Jim Provan",

note = "KEYWORDS Genetic assimilation • hybridization • introgression • Pyrola grandiflora • Pyrola minor • range-edge",

year = "2010",

doi = "10.1111/j.1472-4642.2009.00616.x",

language = "English",

volume = "16",

pages = "1--9",

journal = "Diversity and Distributions-a Journal of Biological Invasions and Biodiversity",

issn = "1366-9516",

publisher = "Wiley",

number = "1",

}

TY - JOUR

T1 - Unidirectional hybridization at a species' range boundary: implications for habitat tracking

AU - Beatty, Gemma, E.

AU - Philipp, Marianne

AU - Provan, Jim

N1 - KEYWORDS Genetic assimilation • hybridization • introgression • Pyrola grandiflora • Pyrola minor • range-edge

PY - 2010

Y1 - 2010

N2 - Aim Introgressive hybridization between a locally rare species and a more abundant congener can drive population extinction via genetic assimilation, or the replacement of the rare species gene pool with that of the common species. To date, however, few studies have assessed the effects of such processes at the limits of species' distribution ranges. In this study, we have examined the potential for hybridization between range-edge populations of the wintergreen Pyrola minor and sympatric populations of Pyrola grandiflora.Location Qeqertarsuaq, Greenland and Churchill, Manitoba, Canada.Methods Genetic analysis of samples from Greenland and Canada was carried out using a combination of nuclear and chloroplast single nucleotide polymorphisms (SNPs).Results Analysis of nuclear SNPs confirmed hybridization in populations of morphologically intermediate individuals, as well as revealing the existence of cryptic hybrids in ostensibly morphologically pure P. minor populations. Analysis of chloroplast SNPs revealed that this hybridization is unidirectional and suggests that hybrids originate via pollen swamping of P. minor by the more common P. grandiflora.Main conclusions Extensive unidirectional hybridization may lead to the extinction of peripheral populations of P. minor where the two species grow sympatrically. Extinction could occur as a result of genetic assimilation where F1s are fertile, or via the removal of unidirectionally pollinated sterile F1s, or by a combination of these processes. This could compromise the ability of species to respond to climate change via habitat tracking, although the final outcome of these processes may ultimately depend on the rate of global climate change and its effect on the species' distributions.

AB - Aim Introgressive hybridization between a locally rare species and a more abundant congener can drive population extinction via genetic assimilation, or the replacement of the rare species gene pool with that of the common species. To date, however, few studies have assessed the effects of such processes at the limits of species' distribution ranges. In this study, we have examined the potential for hybridization between range-edge populations of the wintergreen Pyrola minor and sympatric populations of Pyrola grandiflora.Location Qeqertarsuaq, Greenland and Churchill, Manitoba, Canada.Methods Genetic analysis of samples from Greenland and Canada was carried out using a combination of nuclear and chloroplast single nucleotide polymorphisms (SNPs).Results Analysis of nuclear SNPs confirmed hybridization in populations of morphologically intermediate individuals, as well as revealing the existence of cryptic hybrids in ostensibly morphologically pure P. minor populations. Analysis of chloroplast SNPs revealed that this hybridization is unidirectional and suggests that hybrids originate via pollen swamping of P. minor by the more common P. grandiflora.Main conclusions Extensive unidirectional hybridization may lead to the extinction of peripheral populations of P. minor where the two species grow sympatrically. Extinction could occur as a result of genetic assimilation where F1s are fertile, or via the removal of unidirectionally pollinated sterile F1s, or by a combination of these processes. This could compromise the ability of species to respond to climate change via habitat tracking, although the final outcome of these processes may ultimately depend on the rate of global climate change and its effect on the species' distributions.

U2 - 10.1111/j.1472-4642.2009.00616.x

DO - 10.1111/j.1472-4642.2009.00616.x

M3 - Journal article

SN - 1366-9516

VL - 16

SP - 1

EP - 9

JO - Diversity and Distributions-a Journal of Biological Invasions and Biodiversity

JF - Diversity and Distributions-a Journal of Biological Invasions and Biodiversity

IS - 1

ER -