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    The Distribution of Mating-Type Bias in Natural Populations of the Anther-Smut Ustilago violacea on Silene alba in Virginia

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    AlexH_1998.pdf (1.460Mb)
    Issue Date
    1998-05-01
    Author
    Oudemans, Peter V.
    Alexander, Helen M.
    Antonovics, Janis
    Altizer, S.
    Thrall, Peter H.
    Rose, L.
    Publisher
    Ecological Society of America
    Type
    Article
    Article Version
    Scholarly/refereed, publisher version
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    Abstract
    Complete individual-wide mating-type bias (retrieval of sporidia of only one mating type from germinated teliospores of one fungal individual) was observed to be a common and widespread feature of the anther-smut fungus, Ustilago violacea, collected from natural populations of its host, Silene alba. The bias was usually to mating type A1, but the frequency of bias and its spatial distribution varied from region to region. Populations with high frequencies of bias still showed high rates of disease transmission. Crosses between A1 mating type sporidial lines from completely biased individuals and A2 mating types from unbiased individuals showed no bias in the progeny. During teliospore germination, biased individuals often showed conjugation among adjacent cells of the promycelium, suggesting that both mating types are present in the germinating teliospore but one mating type is unable to grow as free-living sporidia. The complete bias was most readily interpreted as evidence of "haploid lethals" linked to mating type that cause poor survival or growth of the sporidial stage. The results show that such "haploid lethals" may be a common occurrence in natural populations, and that fungal mating systems may vary considerably over short distances.
    Description
    This is the publisher's version, also available electronically from http://www.jstor.org/stable/info/3761395.
    URI
    http://hdl.handle.net/1808/15191
    DOI
    https://doi.org/10.2307/3761395
    ISSN
    0027-5514
    Collections
    • Ecology and Evolutionary Biology Scholarly Works [1389]
    Citation
    Oudemans, P. V. et al. (1998). "The Distribution of Mating-Type Bias in Natural Populations of the Anther-Smut Ustilago violacea on Silene alba in Virginia." Ecology, 90(3):372-381. http://www.dx.doi.org/10.2307/3761395

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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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