Back to Search
Start Over
Genetic coupling of life-history and aerobic performance in Atlantic salmon
- Source :
- Proceedings of the Royal Society B: Biological Sciences
- Publication Year :
- 2021
- Publisher :
- Cold Spring Harbor Laboratory, 2021.
-
Abstract
- A better understanding of the genetic and phenotypic architecture underlying life-history variation is a longstanding aim in biology. Theories suggest energy metabolism determines life-history variation by modulating resource acquisition and allocation trade-offs, but the genetic underpinnings of the relationship and its dependence on ecological conditions have rarely been demonstrated. The strong genetic determination of age-at-maturity by two unlinked genomic regions ( vgll3 and six6 ) makes Atlantic salmon ( Salmo salar ) an ideal model to address these questions. Using more than 250 juveniles in common garden conditions, we quantified the covariation between metabolic phenotypes—standard and maximum metabolic rates (SMR and MMR), and aerobic scope (AS)—and the life-history genomic regions, and tested if food availability modulates the relationships. We found that the early maturation genotype in vgll3 was associated with higher MMR and consequently AS. Additionally, MMR exhibited physiological epistasis; it was decreased when late maturation genotypes co-occurred in both genomic regions. Contrary to our expectation, the life-history genotypes had no effects on SMR. Furthermore, food availability had no effect on the genetic covariation, suggesting a lack of genotype-by-environment interactions. Our results provide insights on the key organismal processes that link energy use at the juvenile stage to age-at-maturity, indicating potential mechanisms by which metabolism and life-history can coevolve.
- Subjects :
- 0106 biological sciences
Genotype
Evolution
Salmo salar
SEA-AGE
INDIVIDUAL VARIATION
010603 evolutionary biology
01 natural sciences
General Biochemistry, Genetics and Molecular Biology
MATURITY
03 medical and health sciences
age-at-maturity
STANDARD METABOLIC-RATE
Resource Acquisition Is Initialization
Animals
life-history evolution
Salmo
Life history
Life History Traits
POPULATION
Research Articles
Coevolution
MODEL SELECTION
BODY-SIZE
General Environmental Science
030304 developmental biology
energetics
0303 health sciences
metabolic rate
Genome
General Immunology and Microbiology
biology
FOOD-DEPRIVATION
General Medicine
biology.organism_classification
Phenotype
Life stage
Evolutionary biology
1181 Ecology, evolutionary biology
GROWTH
Epistasis
General Agricultural and Biological Sciences
Transcription Factors
Subjects
Details
- Database :
- OpenAIRE
- Journal :
- Proceedings of the Royal Society B: Biological Sciences
- Accession number :
- edsair.doi.dedup.....e32fd06de431bb111d052a874d60b658