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Virulence characteristics of apple scab (Venturia inaequalis) isolates from monoculture and mixed orchards
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Barbara, Dez J., Roberts, A. L. and Xu, X.-M. (2008) Virulence characteristics of apple scab (Venturia inaequalis) isolates from monoculture and mixed orchards. Plant Pathology, Vol.57 (No.3). pp. 552-561. doi:10.1111/j.1365-3059.2007.01781.x
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Official URL: http://dx.doi.org/10.1111/j.1365-3059.2007.01781.x
Abstract
Isolates of Venturia inaequalis were sampled from monoculture and mixed orchards of three apple cultivars: Bramley, Cox and Worcester. In addition, single-ascospore progeny isolates were obtained from three crosses between pairs of isolates originating from the three cultivars in monoculture orchards. These field isolates and single-ascospore progenies were inoculated onto each of the three cultivars in a glasshouse. The patterns of infection showed that all three cultivars, commonly regarded as susceptible to scab, contained some specific resistance factors and that scab isolates from both mixed and monoculture orchards appeared to have co-evolved with cultivars. A much higher proportion of isolates from cv. Worcester in the mixed orchard were unable to infect any of the three cultivars than isolates from any other combination of cultivar and orchard type, but there was no other difference between isolates from mixed vs. monoculture orchards. Many isolates could infect both Bramley and Cox, or Cox and Worcester; but only a single isolate could infect both Bramley and Worcester. Results from the testing of 61 single-ascospore progeny isolates suggested that virulence towards Bramley, Cox and Worcester was controlled by at least one, two and three factors, respectively. Moreover, the exact nature of the interactions between these factors in determining virulence depended on the particular pair of isolates concerned.
| Item Type: | Journal Article | ||||
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| Subjects: | Q Science > QH Natural history > QH301 Biology Q Science > QK Botany S Agriculture > SB Plant culture |
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| Divisions: | Faculty of Science, Engineering and Medicine > Science > Life Sciences (2010- ) Faculty of Science, Engineering and Medicine > Science > Life Sciences (2010- ) > Warwick HRI (2004-2010) |
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| Library of Congress Subject Headings (LCSH): | Ascospores, Coevolution, Apple scab, Apples -- Diseases and pests | ||||
| Journal or Publication Title: | Plant Pathology | ||||
| Publisher: | Wiley-Blackwell Publishing Ltd. | ||||
| ISSN: | 0032-0862 | ||||
| Official Date: | June 2008 | ||||
| Dates: |
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| Volume: | Vol.57 | ||||
| Number: | No.3 | ||||
| Page Range: | pp. 552-561 | ||||
| DOI: | 10.1111/j.1365-3059.2007.01781.x | ||||
| Status: | Peer Reviewed | ||||
| Access rights to Published version: | Restricted or Subscription Access | ||||
| Funder: | Great Britain. Dept. for Environment, Food & Rural Affairs (DEFRA) |
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