Publications [#230959] of Marcy K. Uyenoyama

search PubMed.

Papers Published

  1. Newbigin, E; Uyenoyama, MK, The evolutionary dynamics of self-incompatibility systems., Trends in genetics : TIG, vol. 21 no. 9 (September, 2005), pp. 500-505 [16023253], [doi] .
    (last updated on 2025/01/27)

    Abstract:
    Self-incompatible flowering plants reject pollen that expresses the same mating specificity as the pistil (female reproductive tract). In most plant families, pollen and pistil mating specificities segregate as a single locus, the S locus. In at least two self-incompatibility systems, distinct pollen and pistil specificity genes are embedded in an extensive nonrecombining tract. To facilitate consideration of how new S locus specificities arise in systems with distinct pollen and pistil genes, we present a graphical model for the generation of hypotheses. It incorporates the evolutionary principle that nonreciprocal siring success (cross-pollinations between two plants produce seeds in only one direction) tends to favor the rejecting partner. This model suggests that selection within S-allele specificity classes could accelerate the rate of nonsynonymous (amino acid-changing) substitutions, with periodic selective sweeps removing segregating variation within classes. Accelerated substitution within specificity classes could also promote the origin of new S-allele specificities.