Journal article Open Access

Mountain landscape connectivity and subspecies appurtenance shape genetic differentiation in natural plant populations of the snapdragon (Antirrhinum majus L.)

Benoit Pujol; Juliette Archambeau; Aurore Bontemps; Mylène Lascoste; Sara Marin; Alexandre Meunier


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    <subfield code="a">evolutionary ecology</subfield>
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    <subfield code="a">genetic differentiation</subfield>
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    <subfield code="a">landscape genetics</subfield>
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    <subfield code="a">This work was supported by a research grant from the SBF (Société Botanique de France) to BP, a research grant from the IDEX UNITI (CAPS project) to BP and a research grant from the French "Agence Nationale de la Recherche" (ANR-13-JSV7-0002 "CAPA") to BP. This work is also part of a project that received funding from the European Research Council (ERC) under the horizon 2020 research and innovation program (grant agreement No ERC-CoG-2015-681484-ANGI to BP). This work has benefited from the "Laboratoire d'Excellence (LABEX)" entitled TULIP (ANR - 10-LABX -41), from "Investissement d'Avenir" grants managed by the French Agence Nationale de la Recherche (CEBA, ref. ANR -10- LABX -25- 01) and Toulouse Initiative of Excellence "IDEX UNITI" (ANR11-IDEX-0002-02).</subfield>
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    <subfield code="a">Mylène Lascoste</subfield>
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    <subfield code="a">Benoit Pujol</subfield>
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    <subfield code="a">Mountain landscape connectivity and subspecies appurtenance shape genetic differentiation in natural plant populations of the snapdragon (Antirrhinum majus L.)</subfield>
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    <subfield code="a">&lt;p&gt;We carried out a population genetic study of 14 populations (692 plants characterised at 23 microsatellite loci) of the plant species &lt;em&gt;Antirrhinum majus&lt;/em&gt; L. (Plantaginaceae) across its geographic range. Our results showed that &lt;em&gt;A. majus&lt;/em&gt; populations are genetically differentiated and genetically diverse. We also found a small but statistically significant genetic differentiation between &lt;em&gt;A. majus&lt;/em&gt; subspecies &lt;em&gt;pseudomajus&lt;/em&gt; and &lt;em&gt;striatum&lt;/em&gt;. Genetic diversity was higher in &lt;em&gt;A. m.&lt;/em&gt; &lt;em&gt;pseudomajus&lt;/em&gt;. Geographic distance and both latitudinal and longitudinal coordinates had no impact on genetic differentiation and diversity. We therefore did not find any signature of geographical range expansion. Mountains were found to play a role by affecting a small but statistically significant amount of genetic differentiation between populations. Our findings thereby imply that most &lt;em&gt;A. majus&lt;/em&gt; populations are reproductively isolated and that the landscape and the evolutionary history of species affected their genetic variation.&lt;/p&gt;</subfield>
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