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Hybridization leads to interspecific gene flow in Sarracenia (Sarraceniaceae).

Identifieur interne : 002649 ( Main/Exploration ); précédent : 002648; suivant : 002650

Hybridization leads to interspecific gene flow in Sarracenia (Sarraceniaceae).

Auteurs : M Steven Furches [États-Unis] ; Randall L. Small ; Anna Furches

Source :

RBID : pubmed:24088340

Descripteurs français

English descriptors

Abstract

UNLABELLED

PREMISE OF THE STUDY

The role of hybridization in plant evolution remains a source of intense debate. Potential consequences range from genetic dead-ends to species fusion or hybrid speciation. While much has been learned from model systems such as Populus, Iris, and Helianthus, many questions remain. Consisting of 11 species that are all capable of hybridizing, Sarracenia presents an excellent system in which to study hybridization. •

METHODS

Using microsatellites, we examined a single field site consisting of three species: S. leucophylla, S. alata, and S. rubra subsp. wherryi. We determined the level of genetic admixture and compared it with allopatric sites of the same taxa. •

KEY RESULTS

In contrast to the well-defined clusters formed when we examined the allopatric sites, the sympatric field site exhibited a wide range of admixture. Additionally, when the relative genetic makeup of "pure" species at the site was compared with the makeup of hybrids, we found that Sarracenia alata contributed disproportionately to the hybrid genomes. •

CONCLUSIONS

Our study provides further evidence that hybridization is contributing to interspecific gene flow in the genus and that all species do not contribute equally to hybridization. Implications for conservation are discussed.


DOI: 10.3732/ajb.1300038
PubMed: 24088340


Affiliations:


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Le document en format XML

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<name sortKey="Furches, M Steven" sort="Furches, M Steven" uniqKey="Furches M" first="M Steven" last="Furches">M Steven Furches</name>
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<nlm:affiliation>334 Math & Natural Science Building, Department of Biology, Lincoln Memorial University, 6965 Cumberland Gap Parkway, Harrogate, Tennessee 37752 USA.</nlm:affiliation>
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<term>Alleles (MeSH)</term>
<term>Gene Flow (MeSH)</term>
<term>Genetics, Population (MeSH)</term>
<term>Genotype (MeSH)</term>
<term>Hybridization, Genetic (MeSH)</term>
<term>Sarraceniaceae (genetics)</term>
<term>Species Specificity (MeSH)</term>
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<term>Allèles (MeSH)</term>
<term>Flux des gènes (MeSH)</term>
<term>Génotype (MeSH)</term>
<term>Génétique des populations (MeSH)</term>
<term>Hybridation génétique (MeSH)</term>
<term>Sarraceniaceae (génétique)</term>
<term>Spécificité d'espèce (MeSH)</term>
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<term>Sarraceniaceae</term>
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<term>Sarraceniaceae</term>
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<term>Alleles</term>
<term>Gene Flow</term>
<term>Genetics, Population</term>
<term>Genotype</term>
<term>Hybridization, Genetic</term>
<term>Species Specificity</term>
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<term>Allèles</term>
<term>Flux des gènes</term>
<term>Génotype</term>
<term>Génétique des populations</term>
<term>Hybridation génétique</term>
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<b>UNLABELLED</b>
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<div type="abstract" xml:lang="en">
<p>
<b>PREMISE OF THE STUDY</b>
</p>
<p>The role of hybridization in plant evolution remains a source of intense debate. Potential consequences range from genetic dead-ends to species fusion or hybrid speciation. While much has been learned from model systems such as Populus, Iris, and Helianthus, many questions remain. Consisting of 11 species that are all capable of hybridizing, Sarracenia presents an excellent system in which to study hybridization. •</p>
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<div type="abstract" xml:lang="en">
<p>
<b>METHODS</b>
</p>
<p>Using microsatellites, we examined a single field site consisting of three species: S. leucophylla, S. alata, and S. rubra subsp. wherryi. We determined the level of genetic admixture and compared it with allopatric sites of the same taxa. •</p>
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<p>
<b>KEY RESULTS</b>
</p>
<p>In contrast to the well-defined clusters formed when we examined the allopatric sites, the sympatric field site exhibited a wide range of admixture. Additionally, when the relative genetic makeup of "pure" species at the site was compared with the makeup of hybrids, we found that Sarracenia alata contributed disproportionately to the hybrid genomes. •</p>
</div>
<div type="abstract" xml:lang="en">
<p>
<b>CONCLUSIONS</b>
</p>
<p>Our study provides further evidence that hybridization is contributing to interspecific gene flow in the genus and that all species do not contribute equally to hybridization. Implications for conservation are discussed.</p>
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