1990
DOI: 10.1111/j.1365-3059.1990.tb02478.x
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The host range of isolates of downy mildew, Peronospora parasitica, from Brassica crop species

Abstract: The host ranges of 33 isolates of the downy mildew fungus Peronospora parasitica from different Brassica hosts and diverse geographic origins were assessed on a standard set of Brassica accessions Isolates from each host species had a distinct host range, and in some cases isolates from the same host species but different geographic origins differed in host range. Most isolates were capable of infecting hosts other than their species of origin. These results are discussed in relation to species specificity and… Show more

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Cited by 36 publications
(16 citation statements)
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“…Cultivar Ariana {B. napu.s), the susceptible control for isolates P003 and Rl, was resistant to isolates IPOI and 1P02, derived (Table 1). These results confirm that isolates from different Brassica species are most virulent on their species of origin (Sherriff and Lucas 1990). However, the evidence for differential resistance in this host-pathogen combination was clearly demonstrated (Table 1).…”
Section: Resultssupporting
confidence: 79%
“…Cultivar Ariana {B. napu.s), the susceptible control for isolates P003 and Rl, was resistant to isolates IPOI and 1P02, derived (Table 1). These results confirm that isolates from different Brassica species are most virulent on their species of origin (Sherriff and Lucas 1990). However, the evidence for differential resistance in this host-pathogen combination was clearly demonstrated (Table 1).…”
Section: Resultssupporting
confidence: 79%
“…Therefore, it is important to understand the relationship between the P. parasitica isolates that infect the model and the crop plant species. Downy mildew isolates collected from different host genera within the Brassicaceae vary in both their host range and the morphology of structures such as sporangia; however, neither character is suitable for dividing the downy mildews of this family into separate species (Dickinson and Greenhalgh, 1977;Kluczewski and Lucas, 1983;Sherriff and Lucas, 1990;Yerkes and Shaw, 1959). Therefore, downy mildews of any brassicaceous host are currently classified as the same species, P. parasitica (Waterhouse, 1973).…”
Section: Peronospora Parasitica (Downy Mildew) Infection Ofmentioning
confidence: 96%
“…P. parasitica is exclusively parasitic on members of the Cruciferae on which it causes downy mildew. It exists in several host-adapted forms, each being specialized to infect a particular plant species or genus (Sherriff and Lucas, 1990;. Characteristic of plant host species that have coevolved naturally with their obligate parasites is an extensive genetic variation between different Arabidopsis ecotypes and P. parasifica isolates Holub and Beynon, 1997).…”
Section: Introductionmentioning
confidence: 99%