Adaptive genetic variation underlies biocomplexity of Atlantic Cod in the Gulf of Maine and on Georges Bank

Autor: Graham D. Sherwood, Lisa A. Kerr, Douglas R. Zemeckis, Steven X. Cadrin, Gemma V. Clucas, Daniel R. Goethel, Adrienne I. Kovach, Z. Whitener
Jazyk: angličtina
Rok vydání: 2019
Předmět:
0106 biological sciences
0301 basic medicine
Sexual Reproduction
Heredity
Population genetics
Marine and Aquatic Sciences
01 natural sciences
Gadus
Marine Fish
education.field_of_study
Cod fisheries
Multidisciplinary
Genome
Eukaryota
Spring
Gadus morhua
Osteichthyes
Biocomplexity
Vertebrates
Medicine
Seasons
Research Article
Gene Flow
Spawning
Genotype
Science
Population
Modes of Reproduction
Fisheries
Marine Biology
Biology
Cod
010603 evolutionary biology
Polymorphism
Single Nucleotide

Molecular Genetics
03 medical and health sciences
Genetic variation
Genetics
Animals
education
Molecular Biology
Genetic diversity
Evolutionary Biology
Population Biology
Organisms
Biology and Life Sciences
Genetic Variation
Sequence Analysis
DNA

biology.organism_classification
Fishery
030104 developmental biology
Fish
Genetics
Population

Genetic Loci
Chromosome Inversion
Earth Sciences
Atlantic cod
Population Genetics
Developmental Biology
Zdroj: PLoS ONE
PLoS ONE, Vol 14, Iss 5, p e0216992 (2019)
ISSN: 1932-6203
Popis: Atlantic cod (Gadus morhua) populations in the Gulf of Maine (GoM) are at a fraction of their historical abundance, creating economic hardships for fishermen and putting at risk the genetic diversity of the remaining populations. An understanding of the biocomplexity among GoM populations will allow for adaptive genetic diversity to be conserved to maximize the evolutionary potential and resilience of the fishery in a rapidly changing environment. We used restriction-site-associated DNA sequencing (RADseq) to characterize the population structure and adaptive genetic diversity of five spawning aggregations from the western GoM and Georges Bank. We also analyzed cod caught in the eastern GoM, an under-sampled area where spawning aggregations have been extirpated. Using 3,128 single nucleotide polymorphisms (SNPs), we confirmed the existence of three genetically separable spawning groups: (1) winter spawning cod from the western GoM, (2) spring spawning cod, also from the western GoM, and (3) Georges Bank cod. Non-spawning cod from the eastern GoM could not be decisively linked to either of the three spawning groups and may represent a unique component of the resource, a mixed sample, or cod from other unsampled source populations. The genetic differentiation among the three major spawning groups was primarily driven by loci putatively under selection, particularly loci in regions known to contain genomic inversions on linkage groups (LG) 7 and 12. These LGs have been found to be linked to thermal regime in cod across the Atlantic, and so it is possible that variation in timing of spawning in western GoM cod has resulted in temperature-driven adaptive divergence. This complex population structure and adaptive genetic differentiation could be crucial to ensuring the long-term productivity and resilience of the cod fishery, and so it should be considered in future management plans.
Databáze: OpenAIRE
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