Genetic resistance to infectious pancreatic necrosis virus in pedigreed atlantic salmon (salmo salar)
Infectious Pancreatic Necrosis (IPN), due to infection with the IPN virus (IPNv), continues to cause heavy mortalities and is endemic across the major Atlantic salmon farming regions of the world. Prevalances of 0.3-0.8 or more at the freshwater stage and 0.05 to 0.3 in the seawater phase of product...
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The University of Edinburgh
2011
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ftunivedinburgh:oai:era.ed.ac.uk:1842/5293 2023-07-30T04:02:25+02:00 Genetic resistance to infectious pancreatic necrosis virus in pedigreed atlantic salmon (salmo salar) Guy, Derrick Richard Woolliams, John Bishop, Steven Brotherstone, Sue Landcatch Natural Selection Ltd 2011-06-27 application/pdf http://hdl.handle.net/1842/5293 en eng The University of Edinburgh Guy D.R., Bishop S.C., Brotherstone S., Hamilton A., Roberts R.J., McAndrew B.J., Woolliams J.A. (2006) Analysis of the incidence of infectious pancreatic necrosis mortality in pedigreed Atlantic salmon, Salmo salar L. populations Journal of Fish Diseases 29 (2006) 637-647 Guy D.R., Bishop S.C., Woolliams J., Brotherstone S., (2009) Genetic parameters for resistance to Infectious Pancreatic Necrosis in pedigreed Atlantic salmon (Salmo salar) post-smolts using a Reduced Animal Model Aquaculture 290 (2009) 229-235 Guy D.R., Hamilton A., Pearson M.D. (2005) Genetic resistance to infectious pancreatic necrosis (IPN) in Landcatch strains of Atlantic salmon, Salmo salar Aquaculture 247 p18 (2005) presented at Genetics in Aquaculture VIII, 9-15 November 2003, Puerto Varas, Chile Guy D.R., Hamilton A. (2005) Genetic parameters for Harvest and Processing Traits in Landcatch Strains of Atlantic Salmon Salmo salar Aquaculture vol 247 p17 (2005) presented at : Genetics in Aquaculture VIII, 9-15 November 2003, Puerto Varas, Chile http://hdl.handle.net/1842/5293 quantitative genetic disease IPN Infectious Pancreatic Necrosis resistance Thesis or Dissertation Doctoral PhD Doctor of Philosophy 2011 ftunivedinburgh 2023-07-09T20:32:46Z Infectious Pancreatic Necrosis (IPN), due to infection with the IPN virus (IPNv), continues to cause heavy mortalities and is endemic across the major Atlantic salmon farming regions of the world. Prevalances of 0.3-0.8 or more at the freshwater stage and 0.05 to 0.3 in the seawater phase of production are typical. Partially effective injectable vaccines are available against seawater IPN but biosecurity measures remain the main methods of control. To explore the feasibility of selecting salmon for resistance to IPN, a selective breeding program was initiated in 1996, including a series of field and experimental trials challenging known full-sib families with IPNv. A total of 404,723 fish faced IPNv challenge (376,541 seawater and 28,182 freshwater) covering 14 years and 17 separate locations across 7 sites. Mortalities and survivors following IPN challenge were counted by full-sib family and analysed as binomial data (alive / dead). Initial heritabilities were obtained from expressions based on the variance and covariance of full-sib family means for the 2001 year-group, indicating heritabilities (h2) of 0.16, range 0.08 to 0.24, and genetic correlations (rg) between replicate families of 0.71 to 0.78. These results were then confirmed by residual maximum likelihood across all seawater challenged data (year-groups 1997-2003), indicating a h2 of 0.43 (s.e.0.02) across all sites, range 0.06 to 0.40 for individual sites, and a range of rg between replicates of 0.70 to 0.87 (s.e. approx 0.05). To accommodate datasets and pedigrees approaching half a million individually identified fish, an implementation of the Reduced Animal model (RAM) was used to obtain these estimates. A similar level of genetic variation for resistance to freshwater IPN (year-groups 2005-2009) was confirmed with a h2 of 0.49, (s.e. 0.03), range 0.31 to 0.59, and rg between replicates ( 0.80 to 0.95, s.e. approx 0.05), using an Individual Animal Model. When all the data were analysed together, assuming seawater and freshwater survival to be the ... Doctoral or Postdoctoral Thesis Atlantic salmon Salmo salar Edinburgh Research Archive (ERA - University of Edinburgh) |
institution |
Open Polar |
collection |
Edinburgh Research Archive (ERA - University of Edinburgh) |
op_collection_id |
ftunivedinburgh |
language |
English |
topic |
quantitative genetic disease IPN Infectious Pancreatic Necrosis resistance |
spellingShingle |
quantitative genetic disease IPN Infectious Pancreatic Necrosis resistance Guy, Derrick Richard Genetic resistance to infectious pancreatic necrosis virus in pedigreed atlantic salmon (salmo salar) |
topic_facet |
quantitative genetic disease IPN Infectious Pancreatic Necrosis resistance |
description |
Infectious Pancreatic Necrosis (IPN), due to infection with the IPN virus (IPNv), continues to cause heavy mortalities and is endemic across the major Atlantic salmon farming regions of the world. Prevalances of 0.3-0.8 or more at the freshwater stage and 0.05 to 0.3 in the seawater phase of production are typical. Partially effective injectable vaccines are available against seawater IPN but biosecurity measures remain the main methods of control. To explore the feasibility of selecting salmon for resistance to IPN, a selective breeding program was initiated in 1996, including a series of field and experimental trials challenging known full-sib families with IPNv. A total of 404,723 fish faced IPNv challenge (376,541 seawater and 28,182 freshwater) covering 14 years and 17 separate locations across 7 sites. Mortalities and survivors following IPN challenge were counted by full-sib family and analysed as binomial data (alive / dead). Initial heritabilities were obtained from expressions based on the variance and covariance of full-sib family means for the 2001 year-group, indicating heritabilities (h2) of 0.16, range 0.08 to 0.24, and genetic correlations (rg) between replicate families of 0.71 to 0.78. These results were then confirmed by residual maximum likelihood across all seawater challenged data (year-groups 1997-2003), indicating a h2 of 0.43 (s.e.0.02) across all sites, range 0.06 to 0.40 for individual sites, and a range of rg between replicates of 0.70 to 0.87 (s.e. approx 0.05). To accommodate datasets and pedigrees approaching half a million individually identified fish, an implementation of the Reduced Animal model (RAM) was used to obtain these estimates. A similar level of genetic variation for resistance to freshwater IPN (year-groups 2005-2009) was confirmed with a h2 of 0.49, (s.e. 0.03), range 0.31 to 0.59, and rg between replicates ( 0.80 to 0.95, s.e. approx 0.05), using an Individual Animal Model. When all the data were analysed together, assuming seawater and freshwater survival to be the ... |
author2 |
Woolliams, John Bishop, Steven Brotherstone, Sue Landcatch Natural Selection Ltd |
format |
Doctoral or Postdoctoral Thesis |
author |
Guy, Derrick Richard |
author_facet |
Guy, Derrick Richard |
author_sort |
Guy, Derrick Richard |
title |
Genetic resistance to infectious pancreatic necrosis virus in pedigreed atlantic salmon (salmo salar) |
title_short |
Genetic resistance to infectious pancreatic necrosis virus in pedigreed atlantic salmon (salmo salar) |
title_full |
Genetic resistance to infectious pancreatic necrosis virus in pedigreed atlantic salmon (salmo salar) |
title_fullStr |
Genetic resistance to infectious pancreatic necrosis virus in pedigreed atlantic salmon (salmo salar) |
title_full_unstemmed |
Genetic resistance to infectious pancreatic necrosis virus in pedigreed atlantic salmon (salmo salar) |
title_sort |
genetic resistance to infectious pancreatic necrosis virus in pedigreed atlantic salmon (salmo salar) |
publisher |
The University of Edinburgh |
publishDate |
2011 |
url |
http://hdl.handle.net/1842/5293 |
genre |
Atlantic salmon Salmo salar |
genre_facet |
Atlantic salmon Salmo salar |
op_relation |
Guy D.R., Bishop S.C., Brotherstone S., Hamilton A., Roberts R.J., McAndrew B.J., Woolliams J.A. (2006) Analysis of the incidence of infectious pancreatic necrosis mortality in pedigreed Atlantic salmon, Salmo salar L. populations Journal of Fish Diseases 29 (2006) 637-647 Guy D.R., Bishop S.C., Woolliams J., Brotherstone S., (2009) Genetic parameters for resistance to Infectious Pancreatic Necrosis in pedigreed Atlantic salmon (Salmo salar) post-smolts using a Reduced Animal Model Aquaculture 290 (2009) 229-235 Guy D.R., Hamilton A., Pearson M.D. (2005) Genetic resistance to infectious pancreatic necrosis (IPN) in Landcatch strains of Atlantic salmon, Salmo salar Aquaculture 247 p18 (2005) presented at Genetics in Aquaculture VIII, 9-15 November 2003, Puerto Varas, Chile Guy D.R., Hamilton A. (2005) Genetic parameters for Harvest and Processing Traits in Landcatch Strains of Atlantic Salmon Salmo salar Aquaculture vol 247 p17 (2005) presented at : Genetics in Aquaculture VIII, 9-15 November 2003, Puerto Varas, Chile http://hdl.handle.net/1842/5293 |
_version_ |
1772813221416140800 |