Document Detail


Microsatellite markers reveal genetic differentiation among populations of Sclerotinia sclerotiorum from Australian canola fields.
MedLine Citation:
PMID:  15549318     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Eight microsatellite markers were applied to 154 Sclerotinia sclerotiorum isolates from four Australian canola fields, to determine the extent of genetic variation and differentiation in populations of this pathogen. A total of 82 different haplotypes were identified and in each population many haplotypes were unique. Mycelial compatibility grouping, a phenotypic marker system controlled by multiple loci, was often associated with groups of identical or closely related microsatellite haplotypes. Genotypic diversity ranged from 36% to 80% of maximum in the four populations, and gene diversity ranged from 0.23 to 0.79. Genotypic disequilibrium analyses on each of the four populations suggested that both clonal and sexual reproduction contributed to population structure. Analyses based on genetic diversity and fixation indices demonstrated a moderate to high level of differentiation (R(ST)=0.16-0.33, F(ST)=0.18-0.23) between populations from New South Wales and those from Victoria. Despite this genetic diversity, most isolates did not vary in virulence on canola leaves.
Authors:
Adrienne C Sexton; Barbara J Howlett
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't     Date:  2004-11-10
Journal Detail:
Title:  Current genetics     Volume:  46     ISSN:  0172-8083     ISO Abbreviation:  Curr. Genet.     Publication Date:  2004 Dec 
Date Detail:
Created Date:  2004-12-22     Completed Date:  2005-04-26     Revised Date:  2008-11-21    
Medline Journal Info:
Nlm Unique ID:  8004904     Medline TA:  Curr Genet     Country:  United States    
Other Details:
Languages:  eng     Pagination:  357-65     Citation Subset:  IM    
Affiliation:
School of Botany, The University of Melbourne, Parkville, VIC 3010, Australia. sextona@unimelb.edu.au
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MeSH Terms
Descriptor/Qualifier:
Alleles*
Ascomycota / genetics*,  isolation & purification,  pathogenicity*
Australia
Crops, Agricultural / genetics*
Genetic Variation*
Genetics, Population
Genotype
Haplotypes / genetics
Linkage Disequilibrium
Microsatellite Repeats
New South Wales
Plants / microbiology*
Victoria

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


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