Aggressiveness among isolates of Sclerotinia sclerotiorum from sunflower

Ekins, M. G., Aitken, E. A. B. and Goulter, K. C. (2007) Aggressiveness among isolates of Sclerotinia sclerotiorum from sunflower. Australasian Plant Pathology, 36 6: 580-586.


Author Ekins, M. G.
Aitken, E. A. B.
Goulter, K. C.
Title Aggressiveness among isolates of Sclerotinia sclerotiorum from sunflower
Formatted title Aggressiveness among isolates of Sclerotinia sclerotiorum from sunflower
Journal name Australasian Plant Pathology   Check publisher's open access policy
ISSN 0815-3191
Publication date 2007
Sub-type Article (original research)
DOI 10.1071/AP07062
Volume 36
Issue 6
Start page 580
End page 586
Total pages 7
Editor Harrower, K.
Place of publication Collingwood
Publisher CSIRO Publishing
Collection year 2008
Language eng
Subject C1
370403 Recreation and Leisure Studies
620105 Oilseeds
Abstract Isolates of Sclerotinia sclerotiorum differ significantly in aggressiveness on sunflower. In total, 120 isolates were collected from head and basal stem rots of sunflower in two locations in south-east Queensland, Australia. The inoculation of sunflower stems with mycelial plugs and the measurement of lesion development were used to compare aggressiveness between isolates. Rank ordering of isolates indicated differences, with a few isolates displaying high and low aggressive abilities. Differences in aggressiveness were more indicative of a continuous variation rather than discrete groups. Isolate aggressiveness did not correspond to the location of collection nor to the mode of pathogen reproduction or infection from which they were derived. Statistically significant differences between the isolates differed according to the statistical test employed, as different multiple comparison procedures had a greater influence in interpretation of aggressiveness than the isolates themselves. Results indicate individual isolates do not maintain discrete aggressive abilities across the multiple comparison procedures, with the exception of weakly aggressive isolates.
Keyword Plant Sciences
Helianthus annuus
pathogenicity
Multiple Comparison Procedures
Morphological Characters
Growth-stages
Inbred Lines
Resistance
Trifoliorum
Pathogenicity
Virulence
Genotypes
Hosts
Q-Index Code C1
Q-Index Status Confirmed Code

 
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Created: Mon, 18 Feb 2008, 15:29:43 EST