Strategies to control inbreeding in a pig breeding program: a simulation study
Autor(a) principal: | |
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Data de Publicação: | 2019 |
Outros Autores: | , , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Ciência Rural |
Texto Completo: | http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782019000700653 |
Resumo: | ABSTRACT: The objective of this study was to evaluate, through data simulation, the impact of restrictions on the maximum number of full- and half-sibs selected for males and females on the level of inbreeding and genetic gain of the herd. Data came from real populations A and B, composed of Pietrain and Landrace breed pigs, respectively. To generate the simulated populations, a Fortran-language simulator was developed using the (co)variances of the breeding values and the productive and reproductive rates obtained from populations A and B. Two data files were created. The first contained the pedigree of the previous 10 years, with 21,906 and 251,343 animals in populations A and B, respectively. The second included breeding values for age to reach 110 Kg body weight, backfat thickness, and feed conversion, for both populations; longissimus dorsi muscle depth, for population A only; and number of live piglets at the 5th day of life per farrowing, for population B only. Three scenarios were simulated with ten generations by varying the restrictions on the number of full- and half-sibs selected for males and females, with 30 replicates per generation and scenario. Regardless of the mating strategy used in a closed production unit, there is an increase in inbreeding levels. Inbreeding increases are larger in populations of smaller effective size. Restrictions on the number of full- and half-sibs selected are effective in reducing increments in inbreeding. Restriction to a maximum of two full-sibs and three half-sibs for males and three full sisters for females provided the highest genetic gains. |
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Strategies to control inbreeding in a pig breeding program: a simulation studyfull-sibshalf-sibsLandrace breedPietrain breedselection strategiesABSTRACT: The objective of this study was to evaluate, through data simulation, the impact of restrictions on the maximum number of full- and half-sibs selected for males and females on the level of inbreeding and genetic gain of the herd. Data came from real populations A and B, composed of Pietrain and Landrace breed pigs, respectively. To generate the simulated populations, a Fortran-language simulator was developed using the (co)variances of the breeding values and the productive and reproductive rates obtained from populations A and B. Two data files were created. The first contained the pedigree of the previous 10 years, with 21,906 and 251,343 animals in populations A and B, respectively. The second included breeding values for age to reach 110 Kg body weight, backfat thickness, and feed conversion, for both populations; longissimus dorsi muscle depth, for population A only; and number of live piglets at the 5th day of life per farrowing, for population B only. Three scenarios were simulated with ten generations by varying the restrictions on the number of full- and half-sibs selected for males and females, with 30 replicates per generation and scenario. Regardless of the mating strategy used in a closed production unit, there is an increase in inbreeding levels. Inbreeding increases are larger in populations of smaller effective size. Restrictions on the number of full- and half-sibs selected are effective in reducing increments in inbreeding. Restriction to a maximum of two full-sibs and three half-sibs for males and three full sisters for females provided the highest genetic gains.Universidade Federal de Santa Maria2019-01-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782019000700653Ciência Rural v.49 n.7 2019reponame:Ciência Ruralinstname:Universidade Federal de Santa Maria (UFSM)instacron:UFSM10.1590/0103-8478cr20180994info:eu-repo/semantics/openAccessLopes,Jader SilvaRorato,Paulo Roberto NogaraMello,Fernanda Cristina BredaFreitas,Marcelo Silva dePrestes,Alan MirandaGarcia,Diogo AnastácioOliveira,Maurício Morgado deeng2019-07-03T00:00:00ZRevista |
dc.title.none.fl_str_mv |
Strategies to control inbreeding in a pig breeding program: a simulation study |
title |
Strategies to control inbreeding in a pig breeding program: a simulation study |
spellingShingle |
Strategies to control inbreeding in a pig breeding program: a simulation study Lopes,Jader Silva full-sibs half-sibs Landrace breed Pietrain breed selection strategies |
title_short |
Strategies to control inbreeding in a pig breeding program: a simulation study |
title_full |
Strategies to control inbreeding in a pig breeding program: a simulation study |
title_fullStr |
Strategies to control inbreeding in a pig breeding program: a simulation study |
title_full_unstemmed |
Strategies to control inbreeding in a pig breeding program: a simulation study |
title_sort |
Strategies to control inbreeding in a pig breeding program: a simulation study |
author |
Lopes,Jader Silva |
author_facet |
Lopes,Jader Silva Rorato,Paulo Roberto Nogara Mello,Fernanda Cristina Breda Freitas,Marcelo Silva de Prestes,Alan Miranda Garcia,Diogo Anastácio Oliveira,Maurício Morgado de |
author_role |
author |
author2 |
Rorato,Paulo Roberto Nogara Mello,Fernanda Cristina Breda Freitas,Marcelo Silva de Prestes,Alan Miranda Garcia,Diogo Anastácio Oliveira,Maurício Morgado de |
author2_role |
author author author author author author |
dc.contributor.author.fl_str_mv |
Lopes,Jader Silva Rorato,Paulo Roberto Nogara Mello,Fernanda Cristina Breda Freitas,Marcelo Silva de Prestes,Alan Miranda Garcia,Diogo Anastácio Oliveira,Maurício Morgado de |
dc.subject.por.fl_str_mv |
full-sibs half-sibs Landrace breed Pietrain breed selection strategies |
topic |
full-sibs half-sibs Landrace breed Pietrain breed selection strategies |
description |
ABSTRACT: The objective of this study was to evaluate, through data simulation, the impact of restrictions on the maximum number of full- and half-sibs selected for males and females on the level of inbreeding and genetic gain of the herd. Data came from real populations A and B, composed of Pietrain and Landrace breed pigs, respectively. To generate the simulated populations, a Fortran-language simulator was developed using the (co)variances of the breeding values and the productive and reproductive rates obtained from populations A and B. Two data files were created. The first contained the pedigree of the previous 10 years, with 21,906 and 251,343 animals in populations A and B, respectively. The second included breeding values for age to reach 110 Kg body weight, backfat thickness, and feed conversion, for both populations; longissimus dorsi muscle depth, for population A only; and number of live piglets at the 5th day of life per farrowing, for population B only. Three scenarios were simulated with ten generations by varying the restrictions on the number of full- and half-sibs selected for males and females, with 30 replicates per generation and scenario. Regardless of the mating strategy used in a closed production unit, there is an increase in inbreeding levels. Inbreeding increases are larger in populations of smaller effective size. Restrictions on the number of full- and half-sibs selected are effective in reducing increments in inbreeding. Restriction to a maximum of two full-sibs and three half-sibs for males and three full sisters for females provided the highest genetic gains. |
publishDate |
2019 |
dc.date.none.fl_str_mv |
2019-01-01 |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782019000700653 |
url |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782019000700653 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
10.1590/0103-8478cr20180994 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
text/html |
dc.publisher.none.fl_str_mv |
Universidade Federal de Santa Maria |
publisher.none.fl_str_mv |
Universidade Federal de Santa Maria |
dc.source.none.fl_str_mv |
Ciência Rural v.49 n.7 2019 reponame:Ciência Rural instname:Universidade Federal de Santa Maria (UFSM) instacron:UFSM |
instname_str |
Universidade Federal de Santa Maria (UFSM) |
instacron_str |
UFSM |
institution |
UFSM |
reponame_str |
Ciência Rural |
collection |
Ciência Rural |
repository.name.fl_str_mv |
|
repository.mail.fl_str_mv |
|
_version_ |
1749140553903112192 |