Evolution of homomorphic sporophytic self-incompatibility
نویسندگان
چکیده
منابع مشابه
Uneven segregation of sporophytic self-incompatibility alleles in Arabidopsis lyrata.
Self-incompatibility in Arabidopsis lyrata is sporophytically controlled by the multi-allelic S-locus. Self-incompatibility alleles (S-alleles) are under strong negative frequency dependent selection because pollen carrying common S-alleles have fewer mating opportunities. Population genetics theory predicts that deleterious alleles can accumulate if linked to the S-locus. This was tested by st...
متن کاملA general stochastic model for sporophytic self-incompatibility.
Disentangling the processes leading populations to extinction is a major topic in ecology and conservation biology. The difficulty to find a mate in many species is one of these processes. Here, we investigate the impact of self-incompatibility in flowering plants, where several inter-compatible classes of individuals exist but individuals of the same class cannot mate. We model pollen limitati...
متن کاملEvolutionary dynamics of sporophytic self-incompatibility alleles in plants.
The stationary frequency distribution and allelic dynamics in finite populations are analyzed through stochastic simulations in three models of single-locus, multi-allelic sporophytic self-incompatibility. The models differ in the dominance relationships among alleles. In one model, alleles act codominantly in both pollen and style (SSIcod), in the second, alleles form a dominance hierarchy in ...
متن کاملThe evolution of dominance in sporophytic self-incompatibility systems. II. Mate availability and recombination.
Sporophytic self-incompatibility (SSI) is a self-pollen recognition system that enforces outcrossing in plants. Recognition in SSI systems is typically controlled by a complex locus (S-locus) with separate genes that determine pollen and stigma specificity. Experimental studies show that S-alleles can be dominant, recessive, or codominant, and that the dominance level of a given S-allele can de...
متن کاملAllelic genealogies in sporophytic self-incompatibility systems in plants.
Expectations for the time scale and structure of allelic genealogies in finite populations are formed under three models of sporophytic self-incompatibility. The models differ in the dominance interactions among the alleles that determine the self-incompatibility phenotype: In the SSIcod model, alleles act codominantly in both pollen and style, in the SSIdom model, alleles form a dominance hier...
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ژورنال
عنوان ژورنال: Heredity
سال: 1988
ISSN: 0018-067X,1365-2540
DOI: 10.1038/hdy.1988.63