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    On the importance of balancing selection in plants

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    Kelly_2014.pdf (460.1Kb)
    Issue Date
    2014-01
    Author
    Delph, Lynda F.
    Kelly, John K.
    Publisher
    Wiley
    Type
    Article
    Article Version
    Scholarly/refereed, author accepted manuscript
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    Abstract
    Balancing selection refers to a variety of selective regimes that maintain advantageous genetic diversity within populations. We review the history of the ideas regarding the types of selection that maintain such polymorphism in flowering plants, notably heterozygote advantage, negative frequency-dependent selection, and spatial heterogeneity. One shared feature of these mechanisms is that whether an allele is beneficial or detrimental is conditional on its frequency in the population. We highlight examples of balancing selection on a variety of discrete traits. These include the well-referenced case of self-incompatibility and recent evidence from species with nuclear-cytoplasmic gynodioecy, both of which exhibit trans-specific polymorphism, a hallmark of balancing selection. We also discuss and give examples of how spatial heterogeneity in particular, which is often thought unlikely to allow protected polymorphism, can maintain genetic variation in plants (which are rooted in place) as a result of microhabitat selection. Lastly, we discuss limitations of the protected polymorphism concept for quantitative traits, where selection can inflate the genetic variance without maintaining specific alleles indefinitely. We conclude that while discrete-morph variation provides the most unambiguous cases of protected polymorphism, they represent only a fraction of the balancing selection at work in plants.
    Description
    This is the peer reviewed version of the following article: Delph, L. F. and Kelly, J. K. (2014), On the importance of balancing selection in plants. New Phytol, 201: 45–56. doi:10.1111/nph.12441, which has been published in final form at http://doi.org/10.1111/nph.12441. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Self-Archiving.
    URI
    http://hdl.handle.net/1808/24657
    DOI
    https://doi.org/10.1111/nph.12441
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    • Ecology and Evolutionary Biology Scholarly Works [1450]
    Citation
    Delph, L. F. and Kelly, J. K. (2014), On the importance of balancing selection in plants. New Phytol, 201: 45–56. doi:10.1111/nph.12441

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    Lawrence, KS 66045
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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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