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A European phylogeography of Rhinanthus minor compared to Rhinanthus angustifolius: unexpected splits and signs of hybridization

Identifieur interne : 000172 ( Pmc/Curation ); précédent : 000171; suivant : 000173

A European phylogeography of Rhinanthus minor compared to Rhinanthus angustifolius: unexpected splits and signs of hybridization

Auteurs : Jérôme Vrancken [Belgique, Norvège] ; Christian Brochmann [Norvège] ; Renate A. Wesselingh [Belgique]

Source :

RBID : PMC:3434919

Abstract

Rhinanthus minor and Rhinanthus angustifolius (Orobanchaceae) are annual hemiparasites, which occur sympatrically in Europe and are known to hybridize. We studied chloroplast and nuclear (amplified fragment length polymorphism [AFLP]) diversity in R. minor and compared genetic structuring in this species with R. angustifolius by analyzing the AFLP data for both species simultaneously. The AFLP data revealed that populations in Italy, Greece, and southeast Russia initially identified as R. minor were so distant from the other R. minor populations that they probably belong to another, yet unidentified taxon, and we refer to them as Rhinanthus sp. R. minor s.s. showed a clear geographic genetic structure in both the chloroplast DNA (cpDNA) and nuclear genome. The simultaneous analysis of both species shed new light on the previously published findings for R. angustifolius, because some populations now turned out to belong to R. minor. The admixture analysis revealed very few individuals of mixed R. minor–R.angustifolius ancestry in the natural populations in the west of Europe, while admixture levels were higher in the east. The combined haplotype network showed that haplotype H1 was shared among all species and is likely to be ancestral. H2 was more abundant in R. angustifolius and H3 in R. minor, and the latter probably arose from H1 in this species in the east of Europe. The occurrence of H3 in R. angustifolius may be explained by introgression from R. minor, but without interspecific admixture, these are likely to have been old hybridization events. Our study underlines the importance of including related species in phylogeographic studies.


Url:
DOI: 10.1002/ece3.276
PubMed: 22957160
PubMed Central: 3434919

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compared to
<italic>Rhinanthus angustifolius</italic>
: unexpected splits and signs of hybridization</title>
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<name sortKey="Vrancken, Jerome" sort="Vrancken, Jerome" uniqKey="Vrancken J" first="Jérôme" last="Vrancken">Jérôme Vrancken</name>
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<italic>Rhinanthus minor</italic>
and
<italic>Rhinanthus angustifolius</italic>
(Orobanchaceae) are annual hemiparasites, which occur sympatrically in Europe and are known to hybridize. We studied chloroplast and nuclear (amplified fragment length polymorphism [AFLP]) diversity in
<italic>R. minor</italic>
and compared genetic structuring in this species with
<italic>R. angustifolius</italic>
by analyzing the AFLP data for both species simultaneously. The AFLP data revealed that populations in Italy, Greece, and southeast Russia initially identified as
<italic>R. minor</italic>
were so distant from the other
<italic>R. minor</italic>
populations that they probably belong to another, yet unidentified taxon, and we refer to them as
<italic>Rhinanthus</italic>
sp.
<italic>R. minor</italic>
s.s. showed a clear geographic genetic structure in both the chloroplast DNA (cpDNA) and nuclear genome. The simultaneous analysis of both species shed new light on the previously published findings for
<italic>R. angustifolius</italic>
, because some populations now turned out to belong to
<italic>R. minor</italic>
. The admixture analysis revealed very few individuals of mixed
<italic>R. minor–R.angustifolius</italic>
ancestry in the natural populations in the west of Europe, while admixture levels were higher in the east. The combined haplotype network showed that haplotype H1 was shared among all species and is likely to be ancestral. H2 was more abundant in
<italic>R. angustifolius</italic>
and H3 in
<italic>R. minor</italic>
, and the latter probably arose from H1 in this species in the east of Europe. The occurrence of H3 in
<italic>R. angustifolius</italic>
may be explained by introgression from
<italic>R. minor</italic>
, but without interspecific admixture, these are likely to have been old hybridization events. Our study underlines the importance of including related species in phylogeographic studies.</p>
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</TEI>
<pmc article-type="research-article">
<pmc-dir>properties open_access</pmc-dir>
<front>
<journal-meta>
<journal-id journal-id-type="nlm-ta">Ecol Evol</journal-id>
<journal-id journal-id-type="iso-abbrev">Ecol Evol</journal-id>
<journal-id journal-id-type="publisher-id">ece3</journal-id>
<journal-title-group>
<journal-title>Ecology and Evolution</journal-title>
</journal-title-group>
<issn pub-type="ppub">2045-7758</issn>
<issn pub-type="epub">2045-7758</issn>
<publisher>
<publisher-name>Blackwell Publishing Ltd</publisher-name>
<publisher-loc>Oxford, UK</publisher-loc>
</publisher>
</journal-meta>
<article-meta>
<article-id pub-id-type="pmid">22957160</article-id>
<article-id pub-id-type="pmc">3434919</article-id>
<article-id pub-id-type="doi">10.1002/ece3.276</article-id>
<article-categories>
<subj-group subj-group-type="heading">
<subject>Original Research</subject>
</subj-group>
</article-categories>
<title-group>
<article-title>A European phylogeography of
<italic>Rhinanthus minor</italic>
compared to
<italic>Rhinanthus angustifolius</italic>
: unexpected splits and signs of hybridization</article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname>Vrancken</surname>
<given-names>Jérôme</given-names>
</name>
<xref ref-type="aff" rid="au1">1</xref>
<xref ref-type="aff" rid="au2">2</xref>
</contrib>
<contrib contrib-type="author">
<name>
<surname>Brochmann</surname>
<given-names>Christian</given-names>
</name>
<xref ref-type="aff" rid="au2">2</xref>
</contrib>
<contrib contrib-type="author">
<name>
<surname>Wesselingh</surname>
<given-names>Renate A</given-names>
</name>
<xref ref-type="aff" rid="au1">1</xref>
</contrib>
<aff id="au1">
<label>1</label>
<institution>Biodiversity Research Centre, Earth & Life Institute, Université catholique de Louvain</institution>
<addr-line>Croix du Sud 4–5, B-1348 Louvain-la-Neuve, Belgium</addr-line>
</aff>
<aff id="au2">
<label>2</label>
<institution>National Centre for Biosystematics, Natural History Museum, University of Oslo</institution>
<addr-line>P.O. Box 1172 Blindern, NO-0318 Oslo, Norway</addr-line>
</aff>
</contrib-group>
<author-notes>
<corresp id="cor1">Renate Wesselingh, Biodiversity Research Centre, Université catholique de Louvain, Croix du Sud 4-5, Box L7.07.04, 1348 Louvain-la-Neuve, Belgium. Fax: +32 (0)10 47 3490; E-mail:
<email>renate.wesselingh@uclouvain.be</email>
</corresp>
<fn>
<p>Funded by an FSR grant from the University of Louvain.</p>
</fn>
</author-notes>
<pub-date pub-type="ppub">
<month>7</month>
<year>2012</year>
</pub-date>
<volume>2</volume>
<issue>7</issue>
<fpage>1531</fpage>
<lpage>1548</lpage>
<history>
<date date-type="received">
<day>16</day>
<month>2</month>
<year>2012</year>
</date>
<date date-type="rev-recd">
<day>11</day>
<month>4</month>
<year>2012</year>
</date>
<date date-type="accepted">
<day>11</day>
<month>4</month>
<year>2012</year>
</date>
</history>
<permissions>
<copyright-statement>© 2012 The Authors. Published by Blackwell Publishing Ltd.</copyright-statement>
<copyright-year>2012</copyright-year>
<license license-type="open-access" xlink:href="http://creativecommons.org/licenses/by/2.5/">
<license-p>Re-use of this article is permitted in accordance with the Creative Commons Deed, Attribution 2.5, which does not permit commercial exploitation.</license-p>
</license>
</permissions>
<abstract>
<p>
<italic>Rhinanthus minor</italic>
and
<italic>Rhinanthus angustifolius</italic>
(Orobanchaceae) are annual hemiparasites, which occur sympatrically in Europe and are known to hybridize. We studied chloroplast and nuclear (amplified fragment length polymorphism [AFLP]) diversity in
<italic>R. minor</italic>
and compared genetic structuring in this species with
<italic>R. angustifolius</italic>
by analyzing the AFLP data for both species simultaneously. The AFLP data revealed that populations in Italy, Greece, and southeast Russia initially identified as
<italic>R. minor</italic>
were so distant from the other
<italic>R. minor</italic>
populations that they probably belong to another, yet unidentified taxon, and we refer to them as
<italic>Rhinanthus</italic>
sp.
<italic>R. minor</italic>
s.s. showed a clear geographic genetic structure in both the chloroplast DNA (cpDNA) and nuclear genome. The simultaneous analysis of both species shed new light on the previously published findings for
<italic>R. angustifolius</italic>
, because some populations now turned out to belong to
<italic>R. minor</italic>
. The admixture analysis revealed very few individuals of mixed
<italic>R. minor–R.angustifolius</italic>
ancestry in the natural populations in the west of Europe, while admixture levels were higher in the east. The combined haplotype network showed that haplotype H1 was shared among all species and is likely to be ancestral. H2 was more abundant in
<italic>R. angustifolius</italic>
and H3 in
<italic>R. minor</italic>
, and the latter probably arose from H1 in this species in the east of Europe. The occurrence of H3 in
<italic>R. angustifolius</italic>
may be explained by introgression from
<italic>R. minor</italic>
, but without interspecific admixture, these are likely to have been old hybridization events. Our study underlines the importance of including related species in phylogeographic studies.</p>
</abstract>
<kwd-group>
<kwd>AFLP</kwd>
<kwd>cpDNA</kwd>
<kwd>hybridization</kwd>
<kwd>introgression</kwd>
<kwd>phylogeography</kwd>
<kwd>
<italic>Rhinanthus</italic>
</kwd>
</kwd-group>
</article-meta>
</front>
</pmc>
</record>

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