Document Detail

Inheritance of chromosome-length polymorphisms in Ophiostoma ulmi (sensu lato).
MedLine Citation:
PMID:  7553939     Owner:  NLM     Status:  MEDLINE    
We have investigated the mitotic and meiotic transmission of chromosome-length polymorphisms in Ophiostoma ulmi s.l., the causal agent of Dutch elm disease. The North-American aggressive (NAN) strain CESS16K has an atypical electrophoretic karyotype, carrying two chromosome-sized DNAs (chDNAs) that have not been observed in other members of the NAN biotype. Independent CESS16K chDNA preparations, even after repeated inoculation and recovery from the elm host, and analysis of 16 progeny strains after a cross between the NAN strains FG245Br-O and CESS16K, demonstrated that these unique chDNAs are integral components of the CESS16K genome. Analysis of the progeny, by electrophoretic karyotyping and hybridizations with probes specific to individual chDNAs, presented evidence that genome rearrangements can occur as a consequence of meiosis. Even though novel electrophoretic karyotypes and a novel-sized chromosome were observed in the karyotypes of the progeny strains, the low level of reassortment between the chromosomes carrying length polymorphisms presented evidence that there are constraints to genome plasticity for this fungus.
K Dewar; L Bernier
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Current genetics     Volume:  27     ISSN:  0172-8083     ISO Abbreviation:  Curr. Genet.     Publication Date:  1995 May 
Date Detail:
Created Date:  1995-11-06     Completed Date:  1995-11-06     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  8004904     Medline TA:  Curr Genet     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  541-9     Citation Subset:  IM    
Centre de recherche en biologie forestière, Faculté de foresterie et de géomatique, Université Laval, Ste-Foy, Québec, Canada.
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MeSH Terms
Ascomycota / genetics*,  pathogenicity
Chromosomes, Fungal*
Crosses, Genetic
DNA Probes
DNA, Fungal / genetics,  isolation & purification
Electrophoresis, Gel, Pulsed-Field
Gene Rearrangement
Meiosis / genetics
Mitosis / genetics
Mycoses / microbiology
Plant Diseases / microbiology
Polymorphism, Genetic*
Trees / microbiology
Reg. No./Substance:
0/DNA Probes; 0/DNA, Fungal

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

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