The genetic architecture of growth and fillet traits in farmed Atlantic salmon (Salmo salar)

BMC Genetics
Hsin-Yuan TsaiRoss D Houston

Abstract

Performance and quality traits such as harvest weight, fillet weight and flesh color are of economic importance to the Atlantic salmon aquaculture industry. The genetic factors underlying these traits are of scientific and commercial interest. However, such traits are typically polygenic in nature, with the number and size of QTL likely to vary between studies and populations. The aim of this study was to investigate the genetic basis of several growth and fillet traits measured at harvest in a large farmed salmon population by using SNP markers. Due to the marked heterochiasmy in salmonids, an efficient two-stage mapping approach was applied whereby QTL were detected using a sire-based linkage analysis, a sparse SNP marker map and exploiting low rates of recombination, while a subsequent dam-based analysis focused on the significant chromosomes with a denser map to confirm QTL and estimate their position. The harvest traits all showed significant heritability, ranging from 0.05 for fillet yield up to 0.53 for the weight traits. In the sire-based analysis, 1695 offspring with trait records and their 20 sires were successfully genotyped for the SNPs on the sparse map. Chromosomes 13, 18, 19 and 20 were shown to harbor genome-wid...Continue Reading

References

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Citations

Dec 26, 2015·International Journal of Molecular Sciences·Hsin Y TsaiRoss D Houston
Jun 19, 2016·General and Comparative Endocrinology·Juan F AsturianoÁkos Horváth
Apr 5, 2018·International Journal of Molecular Sciences·Hetron Mweemba Munang'anduLior David
Jun 20, 2017·G3 : Genes - Genomes - Genetics·Ben J G SutherlandLouis Bernatchez
Apr 18, 2020·Nature Reviews. Genetics·Ross D HoustonDiego Robledo
Feb 22, 2017·BMC Genomics·Aquaculture Genomics, Genetics and Breeding WorkshopTao Zhou
Feb 26, 2020·Comparative Biochemistry and Physiology. Part B, Biochemistry & Molecular Biology·Jing'an WangYaoguo Li
Feb 26, 2019·G3 : Genes - Genomes - Genetics·David T AshtonMaren Wellenreuther

Methods Mentioned

BETA
PCR
genotyping

Related Concepts

Biological Markers
Chromosomes
Genome
Recombination, Genetic
Salmon
Salmonidae
Selection, Genetic
Zebrafish
Salmo salar
Size

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