Whole-genome association study searching for QTL for Aeromonas salmonicida resistance in rainbow trout.

Autor: Marana MH; Laboratory of Aquatic Pathobiology, Department of Veterinary and Animal Sciences, Faculty of Health and Medical Sciences, University of Copenhagen, Frederiksberg C., Copenhagen, Denmark. mmarana@sund.ku.dk., Karami AM; Laboratory of Aquatic Pathobiology, Department of Veterinary and Animal Sciences, Faculty of Health and Medical Sciences, University of Copenhagen, Frederiksberg C., Copenhagen, Denmark., Ødegård J; Aquagen, Trondheim, Norway., Zuo S; Laboratory of Aquatic Pathobiology, Department of Veterinary and Animal Sciences, Faculty of Health and Medical Sciences, University of Copenhagen, Frederiksberg C., Copenhagen, Denmark., Jaafar RM; Laboratory of Aquatic Pathobiology, Department of Veterinary and Animal Sciences, Faculty of Health and Medical Sciences, University of Copenhagen, Frederiksberg C., Copenhagen, Denmark., Mathiessen H; Laboratory of Aquatic Pathobiology, Department of Veterinary and Animal Sciences, Faculty of Health and Medical Sciences, University of Copenhagen, Frederiksberg C., Copenhagen, Denmark., von Gersdorff Jørgensen L; Laboratory of Aquatic Pathobiology, Department of Veterinary and Animal Sciences, Faculty of Health and Medical Sciences, University of Copenhagen, Frederiksberg C., Copenhagen, Denmark., Kania PW; Laboratory of Aquatic Pathobiology, Department of Veterinary and Animal Sciences, Faculty of Health and Medical Sciences, University of Copenhagen, Frederiksberg C., Copenhagen, Denmark., Dalsgaard I; Institute of Aquatic Resources, Technical University of Denmark, Kgs. Lyngby, Denmark., Nielsen T; Aquasearch Ova ApS, Jelling, Denmark., Buchmann K; Laboratory of Aquatic Pathobiology, Department of Veterinary and Animal Sciences, Faculty of Health and Medical Sciences, University of Copenhagen, Frederiksberg C., Copenhagen, Denmark.
Jazyk: angličtina
Zdroj: Scientific reports [Sci Rep] 2021 Sep 08; Vol. 11 (1), pp. 17857. Date of Electronic Publication: 2021 Sep 08.
DOI: 10.1038/s41598-021-97437-7
Abstrakt: Aeromonas salmonicida subsp. salmonicida, the causative agent of furunculosis, has extensive negative effects on wild and farmed salmonids worldwide. Vaccination induces some protection under certain conditions but disease outbreaks occur even in vaccinated fish. Therefore, alternative disease control approaches are required to ensure the sustainable expansion of rainbow trout aquaculture. Selective breeding can be applied to enhance host resistance to pathogens. The present work used genome-wide association study (GWAS) to identify quantitative trait loci (QTL) associated with A. salmonicida resistance in rainbow trout. A total 798 rainbow trout exposed to A. salmonicida by bath challenge revealed 614 susceptible and 138 resistant fish. Genotyping was conducted using the 57 K single nucleotide polymorphism (SNP) array and the GWAS was performed for survival and time to death phenotypes. We identified a QTL on chromosome 16 and located positional candidate genes in the proximity of the most significant SNPs. In addition, samples from exposed fish were examined for expression of 24 immune-relevant genes indicating a systematic immune response to the infection. The present work demonstrated that resistance to A. salmonicida is moderately heritable with oligogenic architecture. These result will be useful for the future breeding programs for improving the natural resistance of rainbow trout against furunculosis.
(© 2021. The Author(s).)
Databáze: MEDLINE
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