PoplarV1, Main, Exploration, bibRecord, 004216

Phylogenetic and molecular evidence for allochronic speciation in gall-forming aphids (Pemphigus).

Identifieur interne : 004216 ( Main/Exploration ); précédent : 004215; suivant : 004217

Phylogenetic and molecular evidence for allochronic speciation in gall-forming aphids (Pemphigus).

Auteurs : Patrick Abbot [États-Unis] ; James H. Withgott

Source :

Evolution; international journal of organic evolution [ 0014-3820 ] ; 2004.

RBID : pubmed:15119438

Descripteurs français

KwdFr :
- Analyse de séquence d'ADN (MeSH), Animaux (MeSH), Aphides (croissance et développement), Aphides (génétique), Aphides (physiologie), Données de séquences moléculaires (MeSH), Dynamique des populations (MeSH), Facteurs temps (MeSH), Géographie (MeSH), Haplotypes (génétique), Phylogenèse (MeSH), Populus (MeSH), Reproduction (physiologie), Spécificité d'espèce (MeSH), Séquence nucléotidique (MeSH), Étapes du cycle de vie (physiologie), États-Unis (MeSH).
MESH :
- croissance et développement : Aphides.
- génétique : Aphides, Haplotypes.
- physiologie : Aphides, Reproduction, Étapes du cycle de vie.
- Analyse de séquence d'ADN, Animaux, Données de séquences moléculaires, Dynamique des populations, Facteurs temps, Géographie, Phylogenèse, Populus, Spécificité d'espèce, Séquence nucléotidique, États-Unis.
Wicri :
- geographic : États-Unis.

English descriptors

KwdEn :
- Animals (MeSH), Aphids (genetics), Aphids (growth & development), Aphids (physiology), Base Sequence (MeSH), Geography (MeSH), Haplotypes (genetics), Life Cycle Stages (physiology), Molecular Sequence Data (MeSH), Phylogeny (MeSH), Population Dynamics (MeSH), Populus (MeSH), Reproduction (physiology), Sequence Analysis, DNA (MeSH), Species Specificity (MeSH), Time Factors (MeSH), United States (MeSH).
MESH :
- geographic : United States.
- genetics : Aphids, Haplotypes.
- growth & development : Aphids.
- physiology : Aphids, Life Cycle Stages, Reproduction.
- Animals, Base Sequence, Geography, Molecular Sequence Data, Phylogeny, Population Dynamics, Populus, Sequence Analysis, DNA, Species Specificity, Time Factors.

Abstract

Sympatric populations can diverge when variation in phenology or life cycle causes them to mate at distinctly different times. We report patterns consistent with this process (allochronic speciation) in North American gall-forming aphids, in the absence of a host or habitat shift. Pemphigus populi-transversus Riley and P. obesinymphae Aoki form a monophyletic clade within the North American Pemphigus group. They are sympatric on the eastern cottonwood, Populus deltoides (Salicaceae), but have distinctly different life cycles, with sexual stages offset by approximately six months. Field evidence indicates that intermediate phenotypes do not commonly occur, and mitochondrial and bacterial endosymbiont DNA sequences show no maternal gene flow between the two species. Because a genetically distinct population of P. obesinymphae occurs in the southwestern United States on Populus fremontii, we consider the possibility of an initial allopatric phase in the divergence. We discuss the likely origins of the host use patterns in P. obesinymphae, and the larger sequence of evolutionary changes that likely led to the sympatric divergence of P. populi-transversus and P. obesinymphae. A plausible interpretation at this stage of investigation is that a shift in timing of the life cycle in an ancestral population, correlated with an underlying phenological complexity in its host plant, spurred divergence between the incipient species.

PubMed: 15119438

Affiliations:

États-Unis

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Le document en format XML

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<term>Base Sequence (MeSH)</term>
<term>Geography (MeSH)</term>
<term>Haplotypes (genetics)</term>
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<term>Aphides (physiologie)</term>
<term>Données de séquences moléculaires (MeSH)</term>
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<term>Haplotypes (génétique)</term>
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<term>Reproduction (physiologie)</term>
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<term>Étapes du cycle de vie</term>
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<term>Facteurs temps</term>
<term>Géographie</term>
<term>Phylogenèse</term>
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<front><div type="abstract" xml:lang="en">Sympatric populations can diverge when variation in phenology or life cycle causes them to mate at distinctly different times. We report patterns consistent with this process (allochronic speciation) in North American gall-forming aphids, in the absence of a host or habitat shift. Pemphigus populi-transversus Riley and P. obesinymphae Aoki form a monophyletic clade within the North American Pemphigus group. They are sympatric on the eastern cottonwood, Populus deltoides (Salicaceae), but have distinctly different life cycles, with sexual stages offset by approximately six months. Field evidence indicates that intermediate phenotypes do not commonly occur, and mitochondrial and bacterial endosymbiont DNA sequences show no maternal gene flow between the two species. Because a genetically distinct population of P. obesinymphae occurs in the southwestern United States on Populus fremontii, we consider the possibility of an initial allopatric phase in the divergence. We discuss the likely origins of the host use patterns in P. obesinymphae, and the larger sequence of evolutionary changes that likely led to the sympatric divergence of P. populi-transversus and P. obesinymphae. A plausible interpretation at this stage of investigation is that a shift in timing of the life cycle in an ancestral population, correlated with an underlying phenological complexity in its host plant, spurred divergence between the incipient species.</div>
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Phylogenetic and molecular evidence for allochronic speciation in gall-forming aphids (Pemphigus).

Phylogenetic and molecular evidence for allochronic speciation in gall-forming aphids (Pemphigus).

Source :

Descripteurs français

English descriptors

Abstract

Links toward previous steps (curation, corpus...)

Le document en format XML

Pour manipuler ce document sous Unix (Dilib)

Pour mettre un lien sur cette page dans le réseau Wicri

Pour générer des pages wiki