A quantitative genetic signature of senescence in a short-lived perennial plant.

Détails

ID Serval
serval:BIB_3E70D32A3B02
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Institution
Titre
A quantitative genetic signature of senescence in a short-lived perennial plant.
Périodique
Current Biology
Auteur(s)
Pujol B., Marrot P., Pannell J.R.
ISSN
1879-0445 (Electronic)
ISSN-L
0960-9822
Statut éditorial
Publié
Date de publication
2014
Volume
24
Numéro
7
Pages
744-747
Langue
anglais
Résumé
The evolution of senescence (the physiological decline of organisms with age) poses an apparent paradox because it represents a failure of natural selection to increase the survival and reproductive performance of organisms. The paradox can be resolved if natural selection becomes less effective with age, because the death of postreproductive individuals should have diminished effects on Darwinian fitness [1, 2]. A substantial body of empirical work is consistent with this prediction for animals, which transmit their genes to progeny via an immortal germline. However, such evidence is still lacking in plants, which lack a germline and whose reproduction is diffuse and modular across the soma. Here, we provide experimental evidence for a genetic basis of senescence in the short-lived perennial plant Silene latifolia. Our pedigree-based analysis revealed a marked increase with age in the additive genetic variance of traits closely associated with fitness. This result thus extends to plants the quantitative genetic support for the evolutionary theory of senescence.
Pubmed
Web of science
Open Access
Oui
Création de la notice
08/05/2014 8:42
Dernière modification de la notice
20/08/2019 13:35
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