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The joint evolution of lifespan and self-fertilisation

View ORCID ProfileThomas Lesaffre, View ORCID ProfileSylvain Billiard
doi: https://doi.org/10.1101/420877
Thomas Lesaffre
Université de Lille, CNRS UMR 8198 - Evo-Eco-Paleo, F-59655 Villeneuve d’Ascq, FranceCentre de Physique Théorique, CNRS UMR 7644, Ecole Polytechnique, 91128 Palaiseau Cedex, France
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  • For correspondence: thomas.lesaffre@univ-lille.fr
Sylvain Billiard
Université de Lille, CNRS UMR 8198 - Evo-Eco-Paleo, F-59655 Villeneuve d’Ascq, France
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Abstract

In Angiosperms, there exists a strong association between mating system and lifespan. Most self-fertilising species are short-lived and most predominant or obligate outcrossers are long-lived. This association is generally explained by the influence of lifespan on the evolution of the mating system, considering lifespan as fixed. Yet, lifespan can itself evolve, and the mating system may as well influence the evolution of lifespan, as is suggested by joint evolutionary shifts of lifespan and mating system between sister species for instance. In this paper, we build modifier models to study the joint evolution of self-fertilisation and lifespan, including both juvenile and adult inbreeding depression. We show that self-fertilisation is expected to promote evolution towards shorter lifespan, and that the range of conditions under which selfing can evolve rapidly shrinks as lifespan increases. In particular, we show how extrinsic mortality conditions affect the evolutionary associations between lifespan and selfing.

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The copyright holder for this preprint is the author/funder, who has granted bioRxiv a license to display the preprint in perpetuity. It is made available under a CC-BY-NC-ND 4.0 International license.
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Posted September 18, 2018.
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The joint evolution of lifespan and self-fertilisation
Thomas Lesaffre, Sylvain Billiard
bioRxiv 420877; doi: https://doi.org/10.1101/420877
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The joint evolution of lifespan and self-fertilisation
Thomas Lesaffre, Sylvain Billiard
bioRxiv 420877; doi: https://doi.org/10.1101/420877

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