Fatores genéticos e de meio na idade ao primeiro parto de caprinos leiteiros
Autor(a) principal: | |
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Data de Publicação: | 1997 |
Outros Autores: | , , , , |
Tipo de documento: | Artigo |
Idioma: | por |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://hdl.handle.net/11449/231755 |
Resumo: | Data on age at first kidding (IPP) were collected on seven farms in the Brazilian Southeastern region which explored Parda Alpina, Saanen and Toggenburg breds. Least squares (LS) were used to evaluate the effects of environmental factors and to estimate variance components, and the derivative-free restricted maximum likelihood (DFREML) method was used to estimate the variance components of IPP and to genetically evaluate the goats used in the southest region of Brazil. The LS mean and standard error of IPP were 607.18 ± 17.09 days. The interaction of year x kidding season had a significantly influenced IPP, indicating that management conditions varied among the seasons within each specific year, with a direct influence on body weight which is the main criterion adopted by farmers to decide when the animal is ready to breed. The effect of farm-breed combination influenced the IPP. The compararison among levels of farm-breed were done by cluster analysis. The results indicated that the individual goat management within each farm had a greater influence than breed, since goats of different breeds showed high and similar values on those farms having a high mean IPP. Heritability estimates obtained by LS using intraclass correlations among paternal half-sibs and those obtained by REML were 0.220 and 0.369, respectively. |
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Fatores genéticos e de meio na idade ao primeiro parto de caprinos leiteirosGenetic and environmental factors on the age of first kidding of milk goatsGoatsHeritabilityReproductionData on age at first kidding (IPP) were collected on seven farms in the Brazilian Southeastern region which explored Parda Alpina, Saanen and Toggenburg breds. Least squares (LS) were used to evaluate the effects of environmental factors and to estimate variance components, and the derivative-free restricted maximum likelihood (DFREML) method was used to estimate the variance components of IPP and to genetically evaluate the goats used in the southest region of Brazil. The LS mean and standard error of IPP were 607.18 ± 17.09 days. The interaction of year x kidding season had a significantly influenced IPP, indicating that management conditions varied among the seasons within each specific year, with a direct influence on body weight which is the main criterion adopted by farmers to decide when the animal is ready to breed. The effect of farm-breed combination influenced the IPP. The compararison among levels of farm-breed were done by cluster analysis. The results indicated that the individual goat management within each farm had a greater influence than breed, since goats of different breeds showed high and similar values on those farms having a high mean IPP. Heritability estimates obtained by LS using intraclass correlations among paternal half-sibs and those obtained by REML were 0.220 and 0.369, respectively.FMVZ UNESP Campus de BotucatuUENF Campus Dos Goytacazes - RJUFVUEMFMVZ UNESP Campus de BotucatuUniversidade Estadual Paulista (UNESP)UENFUniversidade Federal de Viçosa (UFV)Universidade Estadual de Maringá (UEM)Gonçalves, Heraldo Cesar [UNESP]De Almeida E Silva, MartinhoRegazzi, Adair JoséLopes, Paulo SávioMartins, Elias NunesRamos, Alcides Amorim [UNESP]2022-04-29T08:47:20Z2022-04-29T08:47:20Z1997-05-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article485-493Revista Brasileira de Zootecnia, v. 26, n. 3, p. 485-493, 1997.0100-4859http://hdl.handle.net/11449/2317552-s2.0-17044458177Scopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPporRevista Brasileira de Zootecniainfo:eu-repo/semantics/openAccess2022-04-29T08:47:20Zoai:repositorio.unesp.br:11449/231755Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462022-04-29T08:47:20Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Fatores genéticos e de meio na idade ao primeiro parto de caprinos leiteiros Genetic and environmental factors on the age of first kidding of milk goats |
title |
Fatores genéticos e de meio na idade ao primeiro parto de caprinos leiteiros |
spellingShingle |
Fatores genéticos e de meio na idade ao primeiro parto de caprinos leiteiros Gonçalves, Heraldo Cesar [UNESP] Goats Heritability Reproduction |
title_short |
Fatores genéticos e de meio na idade ao primeiro parto de caprinos leiteiros |
title_full |
Fatores genéticos e de meio na idade ao primeiro parto de caprinos leiteiros |
title_fullStr |
Fatores genéticos e de meio na idade ao primeiro parto de caprinos leiteiros |
title_full_unstemmed |
Fatores genéticos e de meio na idade ao primeiro parto de caprinos leiteiros |
title_sort |
Fatores genéticos e de meio na idade ao primeiro parto de caprinos leiteiros |
author |
Gonçalves, Heraldo Cesar [UNESP] |
author_facet |
Gonçalves, Heraldo Cesar [UNESP] De Almeida E Silva, Martinho Regazzi, Adair José Lopes, Paulo Sávio Martins, Elias Nunes Ramos, Alcides Amorim [UNESP] |
author_role |
author |
author2 |
De Almeida E Silva, Martinho Regazzi, Adair José Lopes, Paulo Sávio Martins, Elias Nunes Ramos, Alcides Amorim [UNESP] |
author2_role |
author author author author author |
dc.contributor.none.fl_str_mv |
Universidade Estadual Paulista (UNESP) UENF Universidade Federal de Viçosa (UFV) Universidade Estadual de Maringá (UEM) |
dc.contributor.author.fl_str_mv |
Gonçalves, Heraldo Cesar [UNESP] De Almeida E Silva, Martinho Regazzi, Adair José Lopes, Paulo Sávio Martins, Elias Nunes Ramos, Alcides Amorim [UNESP] |
dc.subject.por.fl_str_mv |
Goats Heritability Reproduction |
topic |
Goats Heritability Reproduction |
description |
Data on age at first kidding (IPP) were collected on seven farms in the Brazilian Southeastern region which explored Parda Alpina, Saanen and Toggenburg breds. Least squares (LS) were used to evaluate the effects of environmental factors and to estimate variance components, and the derivative-free restricted maximum likelihood (DFREML) method was used to estimate the variance components of IPP and to genetically evaluate the goats used in the southest region of Brazil. The LS mean and standard error of IPP were 607.18 ± 17.09 days. The interaction of year x kidding season had a significantly influenced IPP, indicating that management conditions varied among the seasons within each specific year, with a direct influence on body weight which is the main criterion adopted by farmers to decide when the animal is ready to breed. The effect of farm-breed combination influenced the IPP. The compararison among levels of farm-breed were done by cluster analysis. The results indicated that the individual goat management within each farm had a greater influence than breed, since goats of different breeds showed high and similar values on those farms having a high mean IPP. Heritability estimates obtained by LS using intraclass correlations among paternal half-sibs and those obtained by REML were 0.220 and 0.369, respectively. |
publishDate |
1997 |
dc.date.none.fl_str_mv |
1997-05-01 2022-04-29T08:47:20Z 2022-04-29T08:47:20Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
Revista Brasileira de Zootecnia, v. 26, n. 3, p. 485-493, 1997. 0100-4859 http://hdl.handle.net/11449/231755 2-s2.0-17044458177 |
identifier_str_mv |
Revista Brasileira de Zootecnia, v. 26, n. 3, p. 485-493, 1997. 0100-4859 2-s2.0-17044458177 |
url |
http://hdl.handle.net/11449/231755 |
dc.language.iso.fl_str_mv |
por |
language |
por |
dc.relation.none.fl_str_mv |
Revista Brasileira de Zootecnia |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
485-493 |
dc.source.none.fl_str_mv |
Scopus reponame:Repositório Institucional da UNESP instname:Universidade Estadual Paulista (UNESP) instacron:UNESP |
instname_str |
Universidade Estadual Paulista (UNESP) |
instacron_str |
UNESP |
institution |
UNESP |
reponame_str |
Repositório Institucional da UNESP |
collection |
Repositório Institucional da UNESP |
repository.name.fl_str_mv |
Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP) |
repository.mail.fl_str_mv |
|
_version_ |
1803045935502065664 |