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Differences in Pathogenicity, Genetic Variability and Cultivar Responses among Isolates of Fusarium oxysporum from Strawberry in Australia

Paynter, Michelle L. and Czislowski, Elizabeth and Herrington, Mark E. and Aitken, Elizabeth A.B. (2016) Differences in Pathogenicity, Genetic Variability and Cultivar Responses among Isolates of Fusarium oxysporum from Strawberry in Australia. Journal of the American Society for Horticultural Science, 141 (6). pp. 645-652.

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Article Link(s): http://dx.doi.org/10.21273/jashs03888-16

Publisher URL: http://journal.ashspublications.org/content/141/6/645.abstract

Abstract

Variation in the virulence of Fusarium oxysporum f. sp. fragariae (Fof) strains is important when evaluating the resistance of plants to this fungus. Twenty-five isolates of F. oxysporum harvested from strawberry (Fragaria ×ananassa) plants growing in Australia were characterized using pathogenicity tests, vegetative compatibility groups (VCGs), and genetic analysis of translation elongation factor 1 alpha (EF-1α). The level of disease varied depending on isolate used, indicating heterogeneous populations of Fof. Two distinct VCGs were identified and corresponded to two of the 10 lineages identified by partial EF-1α. Using a subset of Fof isolates, resistance in eight cultivars ranged from highly resistant to highly susceptible, with some cultivar × isolate interaction. ‘Strawberry Festival’, ‘QHI Sugarbaby’, and ‘DPI Rubygem’ had high levels of resistance across all isolates. Isolates from Western Australia (WA) were genetically distinct from those from Queensland (QLD) and were more virulent to ‘Camarosa’, a major cultivar grown in WA.

Item Type:Article
Business groups:Horticulture and Forestry Science
Subjects:Science > Botany > Genetics
Plant culture > Fruit and fruit culture > Berries and small fruits
Plant pests and diseases
Plant pests and diseases > Plant pathology
Deposited On:23 Jan 2017 03:41
Last Modified:15 Mar 2017 02:02

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