Genomic basis for early-life mortality in sharpsnout seabream

Mortality at early life stages of fishes is common in nature and can be shaped by stochastic and selective processes. Selective mortality has rarely been assessed in natural conditions but can now be studied by combining genomic data with information on different life stages that realates to fitness...

Full description

Saved in:
Bibliographic Details
Published in:Scientific reports 2022-10, Vol.12 (1), p.17265-11, Article 17265
Main Authors: Torrado, Héctor, Pegueroles, Cinta, Raventos, Nuria, Carreras, Carlos, Macpherson, Enrique, Pascual, Marta
Format: Article
Language:English
Subjects:
631/158/857
631/208/205
631/208/457
Animals
Environmental organizations
Genome
Genomics
Hatching
High temperature
Humanities and Social Sciences
Immune response
Mortality
multidisciplinary
Otolithic Membrane
Perciformes
Phenotypes
Phylogeny
Polymorphism, Single Nucleotide
Population studies
Science
Science (multidisciplinary)
Sea Bream - genetics
Settlers
Single-nucleotide polymorphism
Stochasticity
Survival
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Mortality at early life stages of fishes is common in nature and can be shaped by stochastic and selective processes. Selective mortality has rarely been assessed in natural conditions but can now be studied by combining genomic data with information on different life stages that realates to fitness. Here we investigate selective mortality between settlers and six-month survivors of the sharpsnout seabream by genotype-phenotype/environmental association studies in three localities along a geographic gradient. We gathered information on 105 individuals at 85,031 SNPs, obtained from individual based 2b-RAD libraries, as well as 9 phenotypic and environmental variables derived from individual otolith readings. We found common signals across localities for potential selection, such as lower survival rates for individuals hatching earlier, growing faster and experiencing higher temperatures during their planktonic phase. We identified 122 loci with parallel significant association to phenotypic and environmental variables. Importantly, one of these loci mapped to the exonic region of the il20rb , a gene involved in immune response, in the phylogenetically closest reference genome, showing parallel frequency changes in non-synonymous mutations in the three studied populations. Further temporal assessments are needed to understand how polymorphisms that are key to selective mortality are maintained.
ISSN:2045-2322
2045-2322
DOI:10.1038/s41598-022-21597-3