Mapping of quantitative trait loci for flesh colour and growth traits in Atlantic salmon (Salmo salar)

Abstract Background Flesh colour and growth related traits in salmonids are both commercially important and of great interest from a physiological and evolutionary perspective. The aim of this study was to identify quantitative trait loci (QTL) affecting flesh colour and growth related traits in an...

Full description

Bibliographic Details
Main Authors: Baranski, Matthew, Moen, Thomas, Våge, Dag
Format: Other/Unknown Material
Language:English
Published: BioMed Central Ltd. 2010
Subjects:
Online Access:http://www.gsejournal.org/content/42/1/17
id ftbiomed:oai:biomedcentral.com:1297-9686-42-17
record_format openpolar
spelling ftbiomed:oai:biomedcentral.com:1297-9686-42-17 2023-05-15T15:31:37+02:00 Mapping of quantitative trait loci for flesh colour and growth traits in Atlantic salmon (Salmo salar) Baranski, Matthew Moen, Thomas Våge, Dag 2010-06-04 http://www.gsejournal.org/content/42/1/17 en eng BioMed Central Ltd. http://www.gsejournal.org/content/42/1/17 Copyright 2010 Baranski et al; licensee BioMed Central Ltd. Research 2010 ftbiomed 2010-07-10T23:31:21Z Abstract Background Flesh colour and growth related traits in salmonids are both commercially important and of great interest from a physiological and evolutionary perspective. The aim of this study was to identify quantitative trait loci (QTL) affecting flesh colour and growth related traits in an F2 population derived from an isolated, landlocked wild population in Norway (Byglands Bleke) and a commercial production population. Methods One hundred and twenty-eight informative microsatellite loci distributed across all 29 linkage groups in Atlantic salmon were genotyped in individuals from four F2 families that were selected from the ends of the flesh colour distribution. Genotyping of 23 additional loci and two additional families was performed on a number of linkage groups harbouring putative QTL. QTL analysis was performed using a line-cross model assuming fixation of alternate QTL alleles and a half-sib model with no assumptions about the number and frequency of QTL alleles in the founder populations. Results A moderate to strong phenotypic correlation was found between colour, length and weight traits. In total, 13 genome-wide significant QTL were detected for all traits using the line-cross model, including three genome-wide significant QTL for flesh colour (Chr 6, Chr 26 and Chr 4). In addition, 32 suggestive QTL were detected (chromosome-wide P < 0.05). Using the half-sib model, six genome-wide significant QTL were detected for all traits, including two for flesh colour (Chr 26 and Chr 4) and 41 suggestive QTL were detected (chromosome-wide P < 0.05). Based on the half-sib analysis, these two genome-wide significant QTL for flesh colour explained 24% of the phenotypic variance for this trait. Conclusions A large number of significant and suggestive QTL for flesh colour and growth traits were found in an F2 population of Atlantic salmon. Chr 26 and Chr 4 presented the strongest evidence for significant QTL affecting flesh colour, while Chr 10, Chr 5, and Chr 4 presented the strongest evidence for significant QTL affecting growth traits (length and weight). These QTL could be strong candidates for use in marker-assisted selection and provide a starting point for further characterisation of the genetic components underlying flesh colour and growth. Other/Unknown Material Atlantic salmon Salmo salar BioMed Central Norway
institution Open Polar
collection BioMed Central
op_collection_id ftbiomed
language English
description Abstract Background Flesh colour and growth related traits in salmonids are both commercially important and of great interest from a physiological and evolutionary perspective. The aim of this study was to identify quantitative trait loci (QTL) affecting flesh colour and growth related traits in an F2 population derived from an isolated, landlocked wild population in Norway (Byglands Bleke) and a commercial production population. Methods One hundred and twenty-eight informative microsatellite loci distributed across all 29 linkage groups in Atlantic salmon were genotyped in individuals from four F2 families that were selected from the ends of the flesh colour distribution. Genotyping of 23 additional loci and two additional families was performed on a number of linkage groups harbouring putative QTL. QTL analysis was performed using a line-cross model assuming fixation of alternate QTL alleles and a half-sib model with no assumptions about the number and frequency of QTL alleles in the founder populations. Results A moderate to strong phenotypic correlation was found between colour, length and weight traits. In total, 13 genome-wide significant QTL were detected for all traits using the line-cross model, including three genome-wide significant QTL for flesh colour (Chr 6, Chr 26 and Chr 4). In addition, 32 suggestive QTL were detected (chromosome-wide P < 0.05). Using the half-sib model, six genome-wide significant QTL were detected for all traits, including two for flesh colour (Chr 26 and Chr 4) and 41 suggestive QTL were detected (chromosome-wide P < 0.05). Based on the half-sib analysis, these two genome-wide significant QTL for flesh colour explained 24% of the phenotypic variance for this trait. Conclusions A large number of significant and suggestive QTL for flesh colour and growth traits were found in an F2 population of Atlantic salmon. Chr 26 and Chr 4 presented the strongest evidence for significant QTL affecting flesh colour, while Chr 10, Chr 5, and Chr 4 presented the strongest evidence for significant QTL affecting growth traits (length and weight). These QTL could be strong candidates for use in marker-assisted selection and provide a starting point for further characterisation of the genetic components underlying flesh colour and growth.
format Other/Unknown Material
author Baranski, Matthew
Moen, Thomas
Våge, Dag
spellingShingle Baranski, Matthew
Moen, Thomas
Våge, Dag
Mapping of quantitative trait loci for flesh colour and growth traits in Atlantic salmon (Salmo salar)
author_facet Baranski, Matthew
Moen, Thomas
Våge, Dag
author_sort Baranski, Matthew
title Mapping of quantitative trait loci for flesh colour and growth traits in Atlantic salmon (Salmo salar)
title_short Mapping of quantitative trait loci for flesh colour and growth traits in Atlantic salmon (Salmo salar)
title_full Mapping of quantitative trait loci for flesh colour and growth traits in Atlantic salmon (Salmo salar)
title_fullStr Mapping of quantitative trait loci for flesh colour and growth traits in Atlantic salmon (Salmo salar)
title_full_unstemmed Mapping of quantitative trait loci for flesh colour and growth traits in Atlantic salmon (Salmo salar)
title_sort mapping of quantitative trait loci for flesh colour and growth traits in atlantic salmon (salmo salar)
publisher BioMed Central Ltd.
publishDate 2010
url http://www.gsejournal.org/content/42/1/17
geographic Norway
geographic_facet Norway
genre Atlantic salmon
Salmo salar
genre_facet Atlantic salmon
Salmo salar
op_relation http://www.gsejournal.org/content/42/1/17
op_rights Copyright 2010 Baranski et al; licensee BioMed Central Ltd.
_version_ 1766362146404302848