Maternal and paternal contributions to pathogen resistance dependent on development stage in a whitefish (Salmonidae)

Details

Serval ID
serval:BIB_4406EF262A6A
Type
Article: article from journal or magazin.
Collection
Publications
Title
Maternal and paternal contributions to pathogen resistance dependent on development stage in a whitefish (Salmonidae)
Journal
Functional Ecology
Author(s)
Clark E.S., Pompini M., Marques da Cunha L., Wedekind C.
ISSN
0269-8463
Publication state
Published
Issued date
2014
Peer-reviewed
Oui
Volume
28
Number
3
Pages
714-723
Language
english
Abstract
It is often assumed that maternal and paternal contributions to offspring phenotype change over the lifetime of an individual. However, studies on parental effects typically suffer from the problems that heritabilities and maternal environmental effects are difficult to separate, and that both may depend on environmental factors and developmental stage.
In order to experimentally disentangle maternal from paternal contributions and the likely effects of developmental stage from ecological effects, we sampled a natural population of the whitefish Coregonus palaea, used gametes for full-factorial in vitro fertilizations, raised over 10000 of the resulting offspring singly at controlled conditions, and exposed them at different points during embryonic development to one of two strains of Pseudomonas fluorescens that differed in their virulence characteristics (only one caused mortality, while both delayed hatching and reduced growth).
Vulnerability to infection increased markedly over embryo development. This change coincided with a distinct shift in the importance of maternal to additive genetic effects on survival. Timing of exposure also affected the variance components for hatching time and larval length, but in a less consistent direction than the variance components for mortality. No significant genetic variation was found for any reaction norms across time points of exposure, indicating a uniformity among genotypes in how susceptibility changed over development. Phenotypes were also typically correlated across time points, which could constrain the evolution of the reaction norms.
Our experiment demonstrates that the relative maternal and paternal contributions to susceptibility to an infection, and hence the evolutionary potential to respond to pathogen-induced selection, depends not only on the kind of pathogenic stress but also on the timing of the challenge.
Keywords
reaction norms, heritability, host-pathogen interaction, Coregonus, susceptibility to infection, salmonid, quantitative genetics
Web of science
Open Access
Yes
Create date
09/09/2013 15:21
Last modification date
20/08/2019 13:48
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