Hybrid necrosis: autoimmunity as a potential gene-flow barrier in plant species

Bomblies, K; Weigel, D

doi:10.1038/nrg2082

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Hybrid necrosis: autoimmunity as a potential gene-flow barrier in plant species

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Bomblies, K
Department Molecular Biology, Max Planck Institute for Developmental Biology, Max Planck Society;

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Weigel, D
Department Molecular Biology, Max Planck Institute for Developmental Biology, Max Planck Society;

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Bomblies, K., & Weigel, D. (2007). Hybrid necrosis: autoimmunity as a potential gene-flow barrier in plant species. Nature Reviews Genetics, 8(5), 382-393. doi:10.1038/nrg2082.

Cite as: https://hdl.handle.net/21.11116/0000-000B-0305-C

Abstract

Ecological factors, hybrid sterility and differences in ploidy levels are well known for contributing to gene-flow barriers in plants. Another common postzygotic incompatibility, hybrid necrosis, has received comparatively little attention in the evolutionary genetics literature. Hybrid necrosis is associated with a suite of phenotypic characteristics that are similar to those elicited in response to various environmental stresses, including pathogen attack. The genetic architecture is generally simple, and complies with the Bateson-Dobzhansky-Muller model for hybrid incompatibility between species. We survey the extensive literature on this topic and present the hypothesis that hybrid necrosis can result from autoimmunity, perhaps as a pleiotropic effect of evolution of genes that are involved in pathogen response.