Beneficial cumulative effects of old parental age on offspring fitness

Travers, Laura M., Carlsson, Hanne, Lind, Martin I. and Maklakov, Alexei A. (2021) Beneficial cumulative effects of old parental age on offspring fitness. Proceedings of the Royal Society B: Biological Sciences, 288 (1960). ISSN 0962-8452

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Abstract

Old parental age is commonly associated with negative effects on offspring life-history traits. Such parental senescence effects are predicted to have a cumulative detrimental effect over successive generations. However, old parents may benefit from producing higher quality offspring when these compete for seasonal resources. Thus, old parents may choose to increase investment in their offspring, thereby producing fewer but larger and more competitive progeny. We show that Caenorhabditis elegans hermaphrodites increase parental investment with advancing age, resulting in fitter offspring who reach their reproductive peak earlier. Remarkably, these effects increased over six successive generations of breeding from old parents and were subsequently reversed following a single generation of breeding from a young parent. Our findings support the hypothesis that offspring of old parents receive more resources and convert them into increasingly faster life histories. These results contradict the theory that old parents transfer a cumulative detrimental ‘ageing factor’ to their offspring.

Item Type: Article
Faculty \ School: Faculty of Science > School of Biological Sciences
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Depositing User: LivePure Connector
Date Deposited: 04 Nov 2021 02:12
Last Modified: 07 Dec 2021 17:35
URI: https://ueaeprints.uea.ac.uk/id/eprint/81974
DOI: 10.1098/rspb.2021.1843

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