Document Detail


Fine-scale genetic structure and gene dispersal in Centaurea corymbosa (Asteraceae) I. Pattern of pollen dispersal.
MedLine Citation:
PMID:  15271079     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Pollen dispersal was characterized within a population of the narrowly endemic perennial herb, Centaurea corymbosa, using exclusion-based and likelihood-based paternity analyses carried out on microsatellite data. Data were used to fit a model of pollen dispersal and to estimate the rates of pollen flow and mutation/genotyping error, by developing a new method. Selfing was rare (1.6%). Pollen dispersed isotropically around each flowering plant following a leptokurtic distribution, with 50% of mating pairs separated by less than 11 m, but 22% by more than 40 m. Estimates of pollen flow lacked precision (0-25%), partially because mutations and/or genotyping errors (0.03-1%) could also explain the occurrence of offspring without a compatible candidate father. However, the pollen pool that fertilized these offspring was little differentiated from the adults of the population whereas strongly differentiated from the other populations, suggesting that pollen flow rate among populations was low. Our results suggest that pollen dispersal is too extended to allow differentiation by local adaptation within a population. However, among populations, gene flow might be low enough for such processes to occur.
Authors:
O J Hardy; S C González-Martínez; H Fréville; G Boquien; A Mignot; B Colas; I Olivieri
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Publication Detail:
Type:  Comparative Study; Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Journal of evolutionary biology     Volume:  17     ISSN:  1010-061X     ISO Abbreviation:  J. Evol. Biol.     Publication Date:  2004 Jul 
Date Detail:
Created Date:  2004-07-23     Completed Date:  2004-08-30     Revised Date:  2008-11-21    
Medline Journal Info:
Nlm Unique ID:  8809954     Medline TA:  J Evol Biol     Country:  Switzerland    
Other Details:
Languages:  eng     Pagination:  795-806     Citation Subset:  IM    
Copyright Information:
Copyright 2004 Blackwell Publishing Ltd
Affiliation:
Laboratoire de Génétique et Ecologie Végétales, Université Libre de Bruxelles, Brussels, Belgium. ohardy@ulb.ac.be
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MeSH Terms
Descriptor/Qualifier:
Centaurea / genetics*,  physiology
Conservation of Natural Resources
DNA Primers
Demography
Gene Frequency
Genetic Variation
Genetics, Population*
Genotype
Geography
Microsatellite Repeats / genetics
Models, Biological*
Mutation / genetics
Pollen / genetics*
Reproduction / physiology
Chemical
Reg. No./Substance:
0/DNA Primers

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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