[article]
| Titre : |
Fine-Scale Genetic Structure and Gene Dispersal in Centaurea corymbosa (Asteraceae), II. Correlated Paternity Within and Among Sibships |
| Auteurs : |
Olivier J. Hardy, Auteur ; Santiago C. González-Martínez, Auteur ; Bruno Colas, Auteur ; Hélène Fréville, Auteur ; Agnès Mignot, Auteur ; Isabelle Olivieri (1957-2016), Auteur |
| Année de publication : |
2004 |
| Article en page(s) : |
pp. 1601-14 |
| Langues : |
Anglais (eng) |
| Catégories : |
[Espèces (in biblio)] Centaurea corymbosa
[Thèmes] Conservation
|
| Mots-clés : |
analyse génétique microsatellite dispersion pollinique |
| Résumé : |
"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." (source : auteurs) |
| Note de contenu : |
Cet article se concentre sur la structure génétique fine et les mécanismes de dispersion des gènes au sein d'une population de Centaurea corymbosa, une espèce de plante endémique à aire de répartition restreinte. L'étude utilise des microsatellites et des analyses de progéniture naturelle pour évaluer la paternité corrélée à la fois au sein des fratries et entre elles, sur différentes échelles spatiales et temporelles. Il vise à comprendre les schémas de dispersion génétique et les modes de reproduction de Centaurea corymbosa afin d'élaborer des stratégies de conservation permettant de maintenir sa diversité génétique et d'assurer sa survie à long terme. |
| Type de publication : |
périodique |
| Référence biblio : |
Hardy O., González-Martínez S., Colas B., Fréville H., Mignot A., Olivieri I., 2004 - Fine-Scale Genetic Structure and Gene Dispersal in Centaurea corymbosa (Asteraceae), II. Correlated Paternity Within and Among Sibships. Genetics, 168 (3) : 1601-14. |
| ID PMB : |
72265 |
| En ligne : |
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC1448787/ |
| Format de la ressource électronique : |
document |
| Permalink : |
http://www.cbnbrest.fr/catalogue_en_ligne/index.php?lvl=notice_display&id=72265 |
in Genetics > vol. 168, n°3 (Année 2004) . - pp. 1601-14
[article]
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