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Poster communications

Evolution of inbreeding depression in species combining self-incompatibility and partial asexual reproduction

Abstract : The origin and maintaining of self-incompatibility systems in angiosperms are still debated questions. Based on the study of interactions between viability loci, causing inbreeding depression, and the S-locus, Charlesworth and Charlesworth (1979) demonstrated that self-compatibility can secondarily evolve through the breakdown of a SI system if inbreeding depression is small enough. The level of inbreeding depression in species that show a self-incompatibility system is a key parameter for the maintenance of the system. Several studies were developed to predict when the system can breakdown. In species combining both self-incompatibility and asexual reproduction, we hypothesize that the maintenance of the SI system may be due to the maintenance of inbreeding depression not only on locus directly linked to the S locus, but at the genome level due to asexual reproduction. We developed a model to simulate the evolution of inbreeding depression in a diploid species that reproduce both asexually and sexually with a self-incompatibility system. Four loci were studied: the S-locus that determines self-incompatibility, a viability locus and two neutral loci. We simulated different scenario, varying the population size, the selection intensity and the asexual reproduction rate. Results of this model will be presented.
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Poster communications
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https://hal.inrae.fr/hal-02755474
Contributor : Migration Prodinra <>
Submitted on : Thursday, April 1, 2021 - 11:23:12 AM
Last modification on : Wednesday, May 26, 2021 - 9:24:01 AM

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  • HAL Id : hal-02755474, version 1
  • PRODINRA : 435014

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Miguel Navascués, Solenn Stoeckel, Stéphanie Mariette. Evolution of inbreeding depression in species combining self-incompatibility and partial asexual reproduction. 11. Congress of the European Society of Evolutionary Biology (ESEB), Aug 2007, Uppsala, Sweden. 2007. ⟨hal-02755474⟩

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