Genetic variation in New Zealand populations of the plant pathogenSclerotinia sclerotiorum
作者:
MargaretA. Carpenter,
Chris Frampton,
Alison Stewart,
期刊:
New Zealand Journal of Crop and Horticultural Science
(Taylor Available online 1999)
卷期:
Volume 27,
issue 1
页码: 13-21
ISSN:0114-0671
年代: 1999
DOI:10.1080/01140671.1999.9514075
出版商: Taylor & Francis Group
关键词: Sclerotinia sclerotiorum;DNA fingerprinting;population genetics;mycelial compatibility;RFLP;genetic variation
数据来源: Taylor
摘要:
Genetic variation of the fungal plant pathogenSclerotinia sclerotiorum(Lib.) de Bary was examined using DNA fingerprinting. Seventy‐five isolates ofS. sclerotiorumwere collected from four populations in the South Island of New Zealand. DNA fingerprints were generated for each isolate by Southern blotting using a cloned repetitive sequence, pLK44.20, as a probe. The 47 different fingerprints produced revealed a high level of variation both within and between populations. Comparison of fingerprint similarities indicated substantial local movement of isolates but gave little evidence for long‐range dispersal. A subset of the isolates was tested for mycelial compatibility. Pairs with identical or highly similar DNA fingerprints gave compatible reactions, whereas isolates whose fingerprints were dissimilar were incompatible. The high level of variation observed in New Zealand populations ofS. sclerotiorumhas relevance for control of diseases caused by this pathogen, as any method of disease control must be effective across the range of pathogen variation.
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