Genome-wide association analysis reveals loci associated with resistance against Piscirickettsia salmonis in two Atlantic salmon (Salmo salar L.) chromosomes
Abstract Background Pisciricketssia salmonis is the causal agent of Salmon Rickettsial Syndrome (SRS), which affects salmon species and causes severe economic losses. Selective breeding for disease resistance represents one approach for controlling SRS in farmed Atlantic salmon. Knowledge concerning...
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ftbiomed:oai:biomedcentral.com:s12864-015-2038-7 2023-05-15T15:29:34+02:00 Genome-wide association analysis reveals loci associated with resistance against Piscirickettsia salmonis in two Atlantic salmon (Salmo salar L.) chromosomes Correa, Katharina Lhorente, Jean López, María Bassini, Liane Naswa, Sudhir Deeb, Nader Di Genova, Alex Maass, Alejandro Davidson, William Yáñez, José 2015-10-24 http://www.biomedcentral.com/1471-2164/16/854 en eng BioMed Central Ltd. http://www.biomedcentral.com/1471-2164/16/854 Copyright 2015 Correa et al. Salmon Rickettsial Syndrome Genome Wide Association Analysis Pathogen resistance Atlantic salmon Single Nucleotide Polymorphism Research article 2015 ftbiomed 2015-10-25T00:09:06Z Abstract Background Pisciricketssia salmonis is the causal agent of Salmon Rickettsial Syndrome (SRS), which affects salmon species and causes severe economic losses. Selective breeding for disease resistance represents one approach for controlling SRS in farmed Atlantic salmon. Knowledge concerning the architecture of the resistance trait is needed before deciding on the most appropriate approach to enhance artificial selection for P. salmonis resistance in Atlantic salmon. The purpose of the study was to dissect the genetic variation in the resistance to this pathogen in Atlantic salmon. Methods 2,601 Atlantic salmon smolts were experimentally challenged against P. salmonis by means of intra-peritoneal injection. These smolts were the progeny of 40 sires and 118 dams from a Chilean breeding population. Mortalities were recorded daily and the experiment ended at day 40 post-inoculation. Fish were genotyped using a 50K Affymetrix® Axiom® myDesign TM Single Nucleotide Polymorphism (SNP) Genotyping Array. A Genome Wide Association Analysis was performed on data from the challenged fish. Linear regression and logistic regression models were tested. Results Genome Wide Association Analysis indicated that resistance to P. salmonis is a moderately polygenic trait. There were five SNPs in chromosomes Ssa01 and Ssa17 significantly associated with the traits analysed. The proportion of the phenotypic variance explained by each marker is small, ranging from 0.007 to 0.045. Candidate genes including interleukin receptors and fucosyltransferase have been found to be physically linked with these genetic markers and may play an important role in the differential immune response against this pathogen. Conclusions Due to the small amount of variance explained by each significant marker we conclude that genetic resistance to this pathogen can be more efficiently improved with the implementation of genetic evaluations incorporating genotype information from a dense SNP array. Article in Journal/Newspaper Atlantic salmon Salmo salar BioMed Central |
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Open Polar |
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BioMed Central |
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ftbiomed |
language |
English |
topic |
Salmon Rickettsial Syndrome Genome Wide Association Analysis Pathogen resistance Atlantic salmon Single Nucleotide Polymorphism |
spellingShingle |
Salmon Rickettsial Syndrome Genome Wide Association Analysis Pathogen resistance Atlantic salmon Single Nucleotide Polymorphism Correa, Katharina Lhorente, Jean López, María Bassini, Liane Naswa, Sudhir Deeb, Nader Di Genova, Alex Maass, Alejandro Davidson, William Yáñez, José Genome-wide association analysis reveals loci associated with resistance against Piscirickettsia salmonis in two Atlantic salmon (Salmo salar L.) chromosomes |
topic_facet |
Salmon Rickettsial Syndrome Genome Wide Association Analysis Pathogen resistance Atlantic salmon Single Nucleotide Polymorphism |
description |
Abstract Background Pisciricketssia salmonis is the causal agent of Salmon Rickettsial Syndrome (SRS), which affects salmon species and causes severe economic losses. Selective breeding for disease resistance represents one approach for controlling SRS in farmed Atlantic salmon. Knowledge concerning the architecture of the resistance trait is needed before deciding on the most appropriate approach to enhance artificial selection for P. salmonis resistance in Atlantic salmon. The purpose of the study was to dissect the genetic variation in the resistance to this pathogen in Atlantic salmon. Methods 2,601 Atlantic salmon smolts were experimentally challenged against P. salmonis by means of intra-peritoneal injection. These smolts were the progeny of 40 sires and 118 dams from a Chilean breeding population. Mortalities were recorded daily and the experiment ended at day 40 post-inoculation. Fish were genotyped using a 50K Affymetrix® Axiom® myDesign TM Single Nucleotide Polymorphism (SNP) Genotyping Array. A Genome Wide Association Analysis was performed on data from the challenged fish. Linear regression and logistic regression models were tested. Results Genome Wide Association Analysis indicated that resistance to P. salmonis is a moderately polygenic trait. There were five SNPs in chromosomes Ssa01 and Ssa17 significantly associated with the traits analysed. The proportion of the phenotypic variance explained by each marker is small, ranging from 0.007 to 0.045. Candidate genes including interleukin receptors and fucosyltransferase have been found to be physically linked with these genetic markers and may play an important role in the differential immune response against this pathogen. Conclusions Due to the small amount of variance explained by each significant marker we conclude that genetic resistance to this pathogen can be more efficiently improved with the implementation of genetic evaluations incorporating genotype information from a dense SNP array. |
format |
Article in Journal/Newspaper |
author |
Correa, Katharina Lhorente, Jean López, María Bassini, Liane Naswa, Sudhir Deeb, Nader Di Genova, Alex Maass, Alejandro Davidson, William Yáñez, José |
author_facet |
Correa, Katharina Lhorente, Jean López, María Bassini, Liane Naswa, Sudhir Deeb, Nader Di Genova, Alex Maass, Alejandro Davidson, William Yáñez, José |
author_sort |
Correa, Katharina |
title |
Genome-wide association analysis reveals loci associated with resistance against Piscirickettsia salmonis in two Atlantic salmon (Salmo salar L.) chromosomes |
title_short |
Genome-wide association analysis reveals loci associated with resistance against Piscirickettsia salmonis in two Atlantic salmon (Salmo salar L.) chromosomes |
title_full |
Genome-wide association analysis reveals loci associated with resistance against Piscirickettsia salmonis in two Atlantic salmon (Salmo salar L.) chromosomes |
title_fullStr |
Genome-wide association analysis reveals loci associated with resistance against Piscirickettsia salmonis in two Atlantic salmon (Salmo salar L.) chromosomes |
title_full_unstemmed |
Genome-wide association analysis reveals loci associated with resistance against Piscirickettsia salmonis in two Atlantic salmon (Salmo salar L.) chromosomes |
title_sort |
genome-wide association analysis reveals loci associated with resistance against piscirickettsia salmonis in two atlantic salmon (salmo salar l.) chromosomes |
publisher |
BioMed Central Ltd. |
publishDate |
2015 |
url |
http://www.biomedcentral.com/1471-2164/16/854 |
genre |
Atlantic salmon Salmo salar |
genre_facet |
Atlantic salmon Salmo salar |
op_relation |
http://www.biomedcentral.com/1471-2164/16/854 |
op_rights |
Copyright 2015 Correa et al. |
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1766359995519074304 |