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Maklakov AA, Carlsson H, Denbaum P, Lind MI, Mautz B, Hinas A, Immler S. Antagonistically pleiotropic allele increases lifespan and late-life reproduction at the cost of early-life reproduction and individual fitness. Proc Biol Sci 2018; 284:rspb.2017.0376. [PMID: 28615498 DOI: 10.1098/rspb.2017.0376] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2017] [Accepted: 05/15/2017] [Indexed: 01/03/2023] Open
Abstract
Evolutionary theory of ageing maintains that increased allocation to early-life reproduction results in reduced somatic maintenance, which is predicted to compromise longevity and late-life reproduction. This prediction has been challenged by the discovery of long-lived mutants with no loss of fecundity. The first such long-lived mutant was found in the nematode worm Caenorhabditis elegans Specifically, partial loss-of-function mutation in the age-1 gene, involved in the nutrient-sensing insulin/insulin-like growth factor signalling pathway, confers longevity, as well as increased resistance to pathogens and to temperature stress without appreciable fitness detriment. Here, we show that the long-lived age-1(hx546) mutant has reduced fecundity and offspring production in early-life, but increased fecundity, hatching success, and offspring production in late-life compared with wild-type worms under standard conditions. However, reduced early-life performance of long-lived mutant animals was not fully compensated by improved performance in late-life and resulted in reduced individual fitness. These results suggest that the age-1(hx546) allele has opposing effects on early-life versus late-life fitness in accordance with antagonistic pleiotropy (AP) and disposable soma theories of ageing. These findings support the theoretical conjecture that experimental studies based on standing genetic variation underestimate the importance of AP in the evolution of ageing.
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Affiliation(s)
- Alexei A Maklakov
- Department of Animal Ecology, Evolutionary Biology Centre, Uppsala University, Norbyvagen 18D, Uppsala 752 36, Sweden .,School of Biological Sciences, University of East Anglia, Norwich Research Park, Norwich NR4 7TJ, Norfolk, UK
| | - Hanne Carlsson
- Department of Animal Ecology, Evolutionary Biology Centre, Uppsala University, Norbyvagen 18D, Uppsala 752 36, Sweden
| | - Philip Denbaum
- Department of Animal Ecology, Evolutionary Biology Centre, Uppsala University, Norbyvagen 18D, Uppsala 752 36, Sweden
| | - Martin I Lind
- Department of Animal Ecology, Evolutionary Biology Centre, Uppsala University, Norbyvagen 18D, Uppsala 752 36, Sweden
| | - Brian Mautz
- Department of Animal Ecology, Evolutionary Biology Centre, Uppsala University, Norbyvagen 18D, Uppsala 752 36, Sweden
| | - Andrea Hinas
- Department of Cell and Molecular Biology, Uppsala University, PO Box 596, Uppsala 75124, Sweden
| | - Simone Immler
- Department of Evolutionary Biology, Evolutionary Biology Centre, Uppsala University, Norbyvagen 18D, Uppsala 752 36, Sweden.,School of Biological Sciences, University of East Anglia, Norwich Research Park, Norwich NR4 7TJ, Norfolk, UK
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