PoplarV1, Main, Exploration, bibRecord, 004079

Clone identification and clonal structure of the European aspen (Populus tremula).

Identifieur interne : 004079 ( Main/Exploration ); précédent : 004078; suivant : 004080

Clone identification and clonal structure of the European aspen (Populus tremula).

Auteurs : Leena I. Suvanto [Finlande] ; Tarja B. Latva-Karjanmaa

Source :

Molecular ecology [ 0962-1083 ] ; 2005.

RBID : pubmed:16029483

Descripteurs français

KwdFr :
- Amorces ADN (MeSH), Arbres (MeSH), Facteurs âges (MeSH), Finlande (MeSH), Génétique des populations (MeSH), Géographie (MeSH), Hétérozygote (MeSH), Populus (anatomie et histologie), Populus (génétique), Populus (physiologie), Reproduction (génétique), Reproduction (physiologie), Répétitions microsatellites (génétique).
MESH :
- anatomie et histologie : Populus.
- génétique : Populus, Reproduction, Répétitions microsatellites.
- physiologie : Populus, Reproduction.
- Amorces ADN, Arbres, Facteurs âges, Finlande, Génétique des populations, Géographie, Hétérozygote.
Wicri :
- geographic : Finlande.

English descriptors

KwdEn :
- Age Factors (MeSH), DNA Primers (MeSH), Finland (MeSH), Genetics, Population (MeSH), Geography (MeSH), Heterozygote (MeSH), Microsatellite Repeats (genetics), Populus (anatomy & histology), Populus (genetics), Populus (physiology), Reproduction (genetics), Reproduction (physiology), Trees (MeSH).
MESH :
- chemical : DNA Primers.
- geographic : Finland.
- anatomy & histology : Populus.
- genetics : Microsatellite Repeats, Populus, Reproduction.
- physiology : Populus, Reproduction.
- Age Factors, Genetics, Population, Geography, Heterozygote, Trees.

Abstract

The European aspen (Populus tremula) is thought to reproduce mostly asexually. Thus aspen forms clones, in which several ramets belong to one genetically defined genet. We compared the clonal structure of aspen in old-growth and managed forests in southern and northeastern Finland. Clones were identified using morphological characters and nine microsatellite loci originally developed for Populus tremuloides. There were more clones identified by microsatellites than morphotypes both in old-growth and managed forest. The average size of the clones was only 2.3 ramets and most clones (70%) consisted of just one ramet. The size of the clones showed no difference between managed and old-growth forests or between northeastern and southern Finland. The small size of the clones suggests that most of them are relatively young. Therefore, sexual reproduction may be more common than previously thought. There was an aggregated spatial genetic structure as measured by Moran's I (0-10 m) and by co-ancestry (rho(ij), 0-20 m). Low level of co-ancestry can be explained by relatively unrestricted gene flow, the important role of disturbance in reproduction, and/or local selection.

DOI: 10.1111/j.1365-294X.2005.02634.x
PubMed: 16029483

Affiliations:

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Le document en format XML

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<front><div type="abstract" xml:lang="en">The European aspen (Populus tremula) is thought to reproduce mostly asexually. Thus aspen forms clones, in which several ramets belong to one genetically defined genet. We compared the clonal structure of aspen in old-growth and managed forests in southern and northeastern Finland. Clones were identified using morphological characters and nine microsatellite loci originally developed for Populus tremuloides. There were more clones identified by microsatellites than morphotypes both in old-growth and managed forest. The average size of the clones was only 2.3 ramets and most clones (70%) consisted of just one ramet. The size of the clones showed no difference between managed and old-growth forests or between northeastern and southern Finland. The small size of the clones suggests that most of them are relatively young. Therefore, sexual reproduction may be more common than previously thought. There was an aggregated spatial genetic structure as measured by Moran's I (0-10 m) and by co-ancestry (rho(ij), 0-20 m). Low level of co-ancestry can be explained by relatively unrestricted gene flow, the important role of disturbance in reproduction, and/or local selection.</div>
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Clone identification and clonal structure of the European aspen (Populus tremula).

Clone identification and clonal structure of the European aspen (Populus tremula).

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