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Genomic signatures of the plateless phenotype in the threespine stickleback
- Source :
- Ecology and evolution, Ecology and Evolution
- Publication Year :
- 2016
- Publisher :
- Wiley, 2016.
-
Abstract
- Understanding the genetic basis of traits involved in adaptive divergence and speciation is one of the most fundamental objectives in evolutionary biology. Toward that end, we look for signatures of extreme plate loss in the genome of freshwater threespine sticklebacks (Gasterosteus aculeatus). Plateless stickleback have been found in only a few lakes and streams across the world; they represent the far extreme of a phenotypic continuum (plate number) that has been studied for years, although plateless individuals have not yet been the subject of much investigation. We use a dense single nucleotide polymorphism dataset made using RADseq to study fish from three freshwater populations containing plateless and low plated individuals, as well as fish from full plated marine populations. Analyses were performed using FastStructure, sliding windows F ST, Bayescan and latent factor mixed models to search for genomic differences between the low plated and plateless phenotypes both within and among the three lakes. At least 18 genomic regions which may contribute to within‐morph plate number variation were detected in our low plated stickleback populations. We see no evidence of a selective sweep between low and plateless fish; rather reduction of plate number within the low plated morph seems to be polygenic.
- Subjects :
- 0106 biological sciences
0301 basic medicine
Evolution
media_common.quotation_subject
Single-nucleotide polymorphism
Gasterosteus
RADseq
Bayescan
010603 evolutionary biology
01 natural sciences
Genome
03 medical and health sciences
Behavior and Systematics
14. Life underwater
Gasterosteus aculeatus
Latent factor mixed models
Lateral plates
Ecology, Evolution, Behavior and Systematics
Ecology
Nature and Landscape Conservation
Original Research
media_common
Genetics
biology
Ambientale
Stickleback
biology.organism_classification
Phenotype
6. Clean water
Speciation
030104 developmental biology
Evolutionary biology
Fish
Selective sweep
Subjects
Details
- ISSN :
- 20457758
- Volume :
- 6
- Database :
- OpenAIRE
- Journal :
- Ecology and Evolution
- Accession number :
- edsair.doi.dedup.....d2a06bf5003e1653336108222b21d3ff