CheneBelgiqueV2, France, Analysis, bibRecord, 000151

Fine-Scale Genetic Structure and Gene Dispersal in Centaurea corymbosa (Asteraceae). II. Correlated Paternity Within and Among Sibships

Identifieur interne : 000151 ( France/Analysis ); précédent : 000150; suivant : 000152

Fine-Scale Genetic Structure and Gene Dispersal in Centaurea corymbosa (Asteraceae). II. Correlated Paternity Within and Among Sibships

Auteurs : Olivier J. Hardy [Belgique, France] ; Santiago C. González-Martínez [France, Espagne] ; Bruno Colas [France] ; Hélène Fréville [France] ; Agnès Mignot [France] ; Isabelle Olivieri [France]

Source :

Genetics [ 0016-6731 ] ; 2004.

RBID : PMC:1448787

Abstract

The fine-scale pattern of correlated paternity was characterized within a population of the narrow-endemic model plant species, Centaurea corymbosa, using microsatellites and natural progeny arrays. We used classical approaches to assess correlated mating within sibships and developed a new method based on pairwise kinship coefficients to assess correlated paternity within and among sibships in a spatio-temporal perspective. We also performed numerical simulations to assess the relative significance of different mechanisms promoting correlated paternity and to compare the statistical properties of different estimators of correlated paternity. Our new approach proved very informative to assess which factors contributed most to correlated paternity and presented good statistical properties. Within progeny arrays, we found that about one-fifth of offspring pairs were full-sibs. This level of correlated mating did not result from correlated pollen dispersal events (i.e., pollen codispersion) but rather from limited mate availability, the latter being due to limited pollen dispersal distances, the heterogeneity of pollen production among plants, phenological heterogeneity and, according to simulations, the self-incompatibility system. We point out the close connection between correlated paternity and the “TwoGener” approach recently developed to infer pollen dispersal and discuss the conditions to be met when applying the latter.

Url:

http://www.ncbi.nlm.nih.gov/pmc/articles/PMC1448787

DOI: 10.1534/genetics.104.027714
PubMed: 15579710
PubMed Central: 1448787

Affiliations:

Links to Exploration step

PMC:1448787

Le document en format XML

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<front><div type="abstract" xml:lang="en"><p>The fine-scale pattern of correlated paternity was characterized within a population of the narrow-endemic model plant species, <italic>Centaurea corymbosa</italic>
, using microsatellites and natural progeny arrays. We used classical approaches to assess correlated mating within sibships and developed a new method based on pairwise kinship coefficients to assess correlated paternity within and among sibships in a spatio-temporal perspective. We also performed numerical simulations to assess the relative significance of different mechanisms promoting correlated paternity and to compare the statistical properties of different estimators of correlated paternity. Our new approach proved very informative to assess which factors contributed most to correlated paternity and presented good statistical properties. Within progeny arrays, we found that about one-fifth of offspring pairs were full-sibs. This level of correlated mating did not result from correlated pollen dispersal events (<italic>i.e</italic>
., pollen codispersion) but rather from limited mate availability, the latter being due to limited pollen dispersal distances, the heterogeneity of pollen production among plants, phenological heterogeneity and, according to simulations, the self-incompatibility system. We point out the close connection between correlated paternity and the “TwoGener” approach recently developed to infer pollen dispersal and discuss the conditions to be met when applying the latter.</p>
</div>
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Fine-Scale Genetic Structure and Gene Dispersal in Centaurea corymbosa (Asteraceae). II. Correlated Paternity Within and Among Sibships

Fine-Scale Genetic Structure and Gene Dispersal in Centaurea corymbosa (Asteraceae). II. Correlated Paternity Within and Among Sibships

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