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    Virulence changes in Uromyces appendiculatus after five asexual generations on a cultivar of bean (Phaseolus vulgaris)

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    AlexH_1985.PDF (1.538Mb)
    Issue Date
    1985-01-01
    Author
    Alexander, Helen M.
    Groth, J. V.
    Roelfs, A. P.
    Publisher
    American Phytopathological Society
    Type
    Article
    Article Version
    Scholarly/refereed, publisher version
    Metadata
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    Abstract
    A field population of Uromyces appendiculatus, the bean rust pathogen, was obtained from the susceptible cultivar Pinto 111 in southwestern Minnesota, and maintained for five asexual generations on a partially resistant bean cultivar, Slimgreen. Changes in latent period, pustule size, and urediniospore production on Slimgreen and Pinto 111 over the generations were small or not detectable. In contrast, there was a large increase in the proportion of the pathogen population virulent on bean cultivar US#3 and large decreases in the proportion virulent on the cultivars Early Gallatin, Roma, and B1349 over the course of the experiment. Although Minnesota populations of U. appendiculatus are polymorphic for virulence on all four cultivars (virulence frequencies between 15 and 55%), none of the four is grown in the state in more than small amounts. These experimental results illustrate that changes in virulence gene frequencies may be independent of pathogen exposure to host resistance.
    Description
    This is the publisher's version, also available electronically from http://www.apsnet.org/publications/phytopathology/backissues/Documents/1985Abstracts/Phyto75_449.htm
    URI
    http://hdl.handle.net/1808/15193
    DOI
    https://doi.org/10.1094/Phyto-75-449
    ISSN
    0031-949X
    Collections
    • Ecology & Evolutionary Biology Scholarly Works [1558]
    Citation
    Alexander, Helen M.; Groth, J.V.; Roelfs, A.P. (1985). "Virulence changes in Uromyces appendiculatus after five asexual generations on a cultivar of bean (Phaseolus vulgaris)." Phytopathology, 75(4):449-453. http://www.dx.doi.org/10.1094/Phyto-75-449

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    Contact KU ScholarWorks
    785-864-8983
    KU Libraries
    1425 Jayhawk Blvd
    Lawrence, KS 66045
    785-864-8983

    KU Libraries
    1425 Jayhawk Blvd
    Lawrence, KS 66045
    Image Credits
     

     

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