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2 results for “Leavenworthia alabamica”
Data from: Recent selection for self-compatibility in a population of Leavenworthia alabamica
The evolution of self-compatibility (SC) is the first step in the evolutionary transition in plants from outcrossing enforced by self-incompatibility (SI) to self-fertilization. In the Brassicaceae, SI is controlled by alleles of two tightly linked genes at the S-locus. Despite permitting inbreeding, mutations at the S-locus leading to SC may be selected if they provide reproductive assurance and/or gain a transmission advantage in a population when SC plants self- and outcross. Positive selection can leave a genomic signature in the regions physically linked to the focus of selection when selection has occurred recently. From an SC population of Leavenworthia alabamica with a known nonfunctional mutation at the S-locus, we collected sequence data from a ∼690 Kb region surrounding the S-locus, as well as from regions not linked to the S-locus. To test for recent positive selection acting at the S-locus, we examined polymorphism and the site-frequency spectra. Using forward simulations, we demonstrate that recent selection of the strength expected for SC at a locus formerly under balancing selection can generate patterns similar to those seen in our empirical data.
Data from: Recent selection for self-compatibility in a population of Leavenworthia alabamica
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