ArticlePloS one2014
Long distance linkage disequilibrium and limited hybridization suggest cryptic speciation in atlantic cod.
Article in PloS one, 2014. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 19 papers.
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19 citing papers in PubMed, 42 citations in OpenAlex.
- Rice homolog of Arabidopsis Xylem NAC domain 1 (OsXND1), a NAC transcription factor regulates drought stress responsive root system architecture in indica rice.Molecular genetics and genomics : MGG · 2024Article
- Geographic variation in gene flow from a genetically distinct migratory ecotype drives population genetic structure of coastal Atlantic cod (Evolutionary applications · 2022Article
- Supergene origin and maintenance in Atlantic cod.Nature ecology & evolution · 2022Article
- Genomic Evidence for Speciation with Gene Flow in Broadcast Spawning Marine Invertebrates.Molecular biology and evolution · 2021Article
- Low-coverage whole-genome sequencing reveals molecular markers for spawning season and sex identification in Gulf of Maine Atlantic cod (Ecology and evolution · 2021Article
- Genomic stability through time despite decades of exploitation in cod on both sides of the Atlantic.Proceedings of the National Academy of Sciences of the United States of America · 2021Article
- SNP genotyping reveals substructuring in weakly differentiated populations of Atlantic cod (Gadus morhua) from diverse environments in the Baltic Sea.Scientific reports · 2020Article
- Modular chromosome rearrangements reveal parallel and nonparallel adaptation in a marine fish.Ecology and evolution · 2020Article
- Novel signals of adaptive genetic variation in northwestern Atlantic cod revealed by whole-genome sequencing.Evolutionary applications · 2019Article
- Strong selection pressures maintain divergence on genomic islands in Atlantic cod (Gadus morhua L.) populations.Genetics, selection, evolution : GSE · 2019Article
- The spatial scale of dispersal revealed by admixture tracts.Evolutionary applications · 2019Article
- Codweb: Whole-genome sequencing uncovers extensive reticulations fueling adaptation among Atlantic, Arctic, and Pacific gadids.Science advances · 2019Article
- Cryptic temporal changes in stock composition explain the decline of a flounder (Evolutionary applications · 2019Article
- Adaptive genetic variation underlies biocomplexity of Atlantic Cod in the Gulf of Maine and on Georges Bank.PloS one · 2019Article
- Trans-oceanic genomic divergence of Atlantic cod ecotypes is associated with large inversions.Heredity · 2017Article
- Genomic evidence of hybridization between two independent invasions of European green crab (Carcinus maenas) in the Northwest Atlantic.Heredity · 2017Article
- "Islands of Divergence" in the Atlantic Cod Genome Represent Polymorphic Chromosomal Rearrangements.Genome biology and evolution · 2016Article
- Three chromosomal rearrangements promote genomic divergence between migratory and stationary ecotypes of Atlantic cod.Scientific reports · 2016Article
- Adaptation to Low Salinity Promotes Genomic Divergence in Atlantic Cod (Gadus morhua L.).Genome biology and evolution · 2015Article
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Authors and funding
11 authors at 5 institutions in 3 countries.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Hybrid zones provide unprecedented opportunity for the study of the evolution of reproductive isolation, and the extent of hybridization across individuals and genomes can illuminate the degree of isolation. We examine patterns of interchromosomal linkage disequilibrium (ILD) and the presence of hybridization in Atlantic cod, Gadus morhua, in previously identified hybrid zones in the North Atlantic. Here, previously identified clinal loci were mapped to the cod genome with most (∼70%) occurring in or associated with (<5 kb) coding regions representing a diverse array of possible functions and pathways. Despite the observation that clinal loci were distributed across three linkage groups, elevated ILD was observed among all groups of clinal loci and strongest in comparisons involving a region of low recombination along linkage group 7. Evidence of ILD supports a hypothesis of divergence hitchhiking transitioning to genome hitchhiking consistent with reproductive isolation. This hypothesis is supported by Bayesian characterization of hybrid classes present and we find evidence of common F1 hybrids in several regions consistent with frequent interbreeding, yet little evidence of F2 or backcrossed individuals. This work suggests that significant barriers to hybridization and introgression exist among these co-occurring groups of cod either through strong selection against hybrid individuals, or genetic incompatibility and intrinsic barriers to hybridization. In either case, the presence of strong clinal trends, and little gene flow despite extensive hybridization supports a hypothesis of reproductive isolation and cryptic speciation in Atlantic cod. Further work is required to test the degree and nature of reproductive isolation in this species.
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