DNA sequence and RFLP analysis of Pleurotopsis longinqua from three disjunct populations

The known distribution of Pleurotopsis longinqua is restricted to southeastern Australia, New Zealand, Patagonia, and the northern Pacific coast of North America. Previous studies demonstrated that isolates from all of these areas were sexually compatible (i.e., were the same biological species). In...

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Bibliographic Details
Published in:Mycologia 1998-07, Vol.90 (4), p.595-600
Main Authors: Hughes, K.W. (University of Tennessee, Knoxville, TN.), Toyohara, T.L, Petersen, R.H
Format: Article
Language:English
Subjects:
ADN
AGARICALES
ALASKA
ARGENTINA
ARGENTINE
BIOTIPOS
BIOTYPE
BIOTYPES
BRITISH COLUMBIA
CHILE
CHILI
COLOMBIE BRITANNIQUE
COLUMBIA BRITANICA
DNA
EVOLUCION
EVOLUTION
Evolutionary genetics
Gene flow
GENETIC ANALYSIS
Genetic mutation
GENETIC VARIATION
GENETICA
GENETICS
Genetics/Molecular Biology
GENETIQUE
Geographic regions
GEOGRAPHICAL RACES
NEW ZEALAND
NOUVELLE ZELANDE
NUCLEOTIDE SEQUENCE
Nucleotide sequences
NUEVA ZELANDIA
Panellus longinquus
Pleurotopsis longinqua
Population distributions
Population genetics
restriction fragment length polymorphism
RFLP
ribosomal DNA
RIBOSOMAS
RIBOSOME
RIBOSOMES
SECUENCIA NUCLEOTIDICA
SEQUENCE NUCLEOTIDIQUE
TASMANIA
TASMANIE
Tricholomataceae
VARIACION GENETICA
VARIATION GENETIQUE
WASHINGTON
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Summary:The known distribution of Pleurotopsis longinqua is restricted to southeastern Australia, New Zealand, Patagonia, and the northern Pacific coast of North America. Previous studies demonstrated that isolates from all of these areas were sexually compatible (i.e., were the same biological species). Intercompatibility studies, however, did not provide information about genetic (evolutionary) relationships among the disjunct populations. Restriction fragment patterns of the nuclear ribosomal ITS1-5.8S-ITS2 were compared for isolates from each geographical region to estimate genetic divergence. Only one enzyme, Taq I, discriminated between different collections. To further examine genetic divergence, the ITS1-5.8S-ITS2 region was sequenced for one collection from each geographical area. Only four base-pair differences were observed among isolates from New Zealand, Argentina and Washington State. The remarkable similarity of these collections suggests that the current disjunct distribution is not very old.
ISSN:0027-5514
1557-2536
DOI:10.1080/00275514.1998.12026948