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46 results for “Leavenworthia”
Data from: Recent selection for self-compatibility in a population of Leavenworthia alabamica
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Data from: Demographic and population-genetic tests provide mixed support for the abundant center hypothesis in the endemic plant Leavenworthia stylosa
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Data from: Reproductive character displacement shapes a spatially structured petal color polymorphism in Leavenworthia stylosa
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Data from: Phylogeny of Leavenworthia S-alleles suggests unidirectional mating system evoution and enhanced positive selection following an ancient population bottleneck
The adoption of self-fertilization from an ancestral outcrossing state is one of the most common evolutionary transitions in the flowering plants. In the mustard family, outcrossing is typically enforced by sporophytic self-incompatibility (SI), but there are also many self-compatible species. The genus Leavenworthia contains taxa that either possess or lack SI. Here we present data showing that SI is associated with strict outcrossing and that there is widespread trans-specific sequence polymorphism at the locus involved in the recognition of self-pollen (the S-locus). This ancestral polymorphism is consistent with the presence of an outcrossing mating system in the common ancestor of Leavenworthia species, and suggests that there have been several independent losses of SI in the group. When compared with other mustard species, the bulk of Leavenworthia S-allele sequences are highly diverged from those found in other Brassicaceae and show relatively low levels of nucleotide diversity, a pattern that suggests the common ancestor of the genus likely underwent a strong population bottleneck. The hypothesis of post-bottleneck S-locus rediversification is supported by tests showing stronger positive selection acting on S-alleles from Leavenworthia than those found in other Brassicaceae.
Data from: Phylogeny of Leavenworthia S-alleles suggests unidirectional mating system evoution and enhanced positive selection following an ancient population bottleneck
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Data from: Secondary evolution of a self-incompatibility locus in the Brassicaceae genus Leavenworthia
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International Brain Laboratory public data
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