Age at first calving and calving interval of holstein friesian and crossbred holstein friesian: Gir cows
Autor(a) principal: | |
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Data de Publicação: | 2014 |
Outros Autores: | , |
Tipo de documento: | Artigo |
Idioma: | por |
Título da fonte: | Pesquisa Agropecuária Brasileira (Online) |
Texto Completo: | https://seer.sct.embrapa.br/index.php/pab/article/view/16470 |
Resumo: | Ages at first calving of 52 Holstein-Friesian (HPB) cows, 69 1/2 HPB: 1/2 Gir (F1) and 66 3/4 HPB: 1/4 Gir (B1) were compared. The animals of all three groups were maintained together in the same herd. Artificial insemination with fresh semen was mainly used, and also natural mating, with HPB bulls for HPB and F1 cows, and F1 bulls for B1 cows. The model for age at first calving included the effects (fixed) of year-season of birth of cow genetic group and the interaction of both effects. Only genetic group effects were significant (P<0.05). The model for calving interval induded the effect of year and season of calving, genetic group, two and three factor interactions of these effects, and linear and quadratic regression on parity. The season x genetic group interaction was significant (P = 0.05). The relation between interval (E) and parity (N) was described by the equation E = 576.21-41.23 N + 4.83 N2, indicating that the minimum interval was attained at the 4th calving. |
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Age at first calving and calving interval of holstein friesian and crossbred holstein friesian: Gir cowsIdade ao primeiro parto e intervalo entre partos de vacas HPB e mestiças HPB: Girage at first calving; animal breeding; calving interval; crossbreeding; pure breedingcriação de animais; cruzamento; mestiços; raça puraAges at first calving of 52 Holstein-Friesian (HPB) cows, 69 1/2 HPB: 1/2 Gir (F1) and 66 3/4 HPB: 1/4 Gir (B1) were compared. The animals of all three groups were maintained together in the same herd. Artificial insemination with fresh semen was mainly used, and also natural mating, with HPB bulls for HPB and F1 cows, and F1 bulls for B1 cows. The model for age at first calving included the effects (fixed) of year-season of birth of cow genetic group and the interaction of both effects. Only genetic group effects were significant (P<0.05). The model for calving interval induded the effect of year and season of calving, genetic group, two and three factor interactions of these effects, and linear and quadratic regression on parity. The season x genetic group interaction was significant (P = 0.05). The relation between interval (E) and parity (N) was described by the equation E = 576.21-41.23 N + 4.83 N2, indicating that the minimum interval was attained at the 4th calving.Foram comparadas as idades ao primeiro parto de 52 vacas "Holandês Preto-e-Branco" (HPB), 69 vacas 1/2 HPB: 1/2 Giz (F1) e 66 vacas 3/4 HPB: 1/4 Gir (B1). Os animais dos três grupos eram mantidos no mesmo rebanho. Foram utilizadas principalmente a inseminação artificial com sêmen fresco refrigerado, e a monta controlada com touros HPB para as fêmeas HPB e F1, e touros F1 para as fêmeas B1. O modelo para a idade ao primeiro parto inclui os efeitos (fixos) de ano-época de nascimento da vaca, grau de sangue e a interação destes dois efeitos. Apenas o grau de sangue teve efeitos significativos (P<0,05). O modelo para o intervalo entre partos inclui os efeitos de ano e estação do parto, grau de sangue, interações duplas e triplas destes fatores, e regressão linear e quadrática sobre o número ordinal da parição. A interação estação x grau de sangue foi significativa (P = 0,05). A relação entre o intervalo (E) e a ordem de parição (N) foi descrita pela equação E = 576,21-41,25 N+4,83 N2, indicando que o intervalo mínimo foi o correspondente ao quarto parto.Pesquisa Agropecuaria BrasileiraPesquisa Agropecuária BrasileiraFreitas, Ary Ferreira deMadalena, Fernando EnriqueMartinez, Mário Luiz2014-04-15info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://seer.sct.embrapa.br/index.php/pab/article/view/16470Pesquisa Agropecuaria Brasileira; v.15, n.1, jan. 1980; 101-105Pesquisa Agropecuária Brasileira; v.15, n.1, jan. 1980; 101-1051678-39210100-104xreponame:Pesquisa Agropecuária Brasileira (Online)instname:Empresa Brasileira de Pesquisa Agropecuária (Embrapa)instacron:EMBRAPAporhttps://seer.sct.embrapa.br/index.php/pab/article/view/16470/10745info:eu-repo/semantics/openAccess2014-04-15T19:28:59Zoai:ojs.seer.sct.embrapa.br:article/16470Revistahttp://seer.sct.embrapa.br/index.php/pabPRIhttps://old.scielo.br/oai/scielo-oai.phppab@sct.embrapa.br || sct.pab@embrapa.br1678-39210100-204Xopendoar:2014-04-15T19:28:59Pesquisa Agropecuária Brasileira (Online) - Empresa Brasileira de Pesquisa Agropecuária (Embrapa)false |
dc.title.none.fl_str_mv |
Age at first calving and calving interval of holstein friesian and crossbred holstein friesian: Gir cows Idade ao primeiro parto e intervalo entre partos de vacas HPB e mestiças HPB: Gir |
title |
Age at first calving and calving interval of holstein friesian and crossbred holstein friesian: Gir cows |
spellingShingle |
Age at first calving and calving interval of holstein friesian and crossbred holstein friesian: Gir cows Freitas, Ary Ferreira de age at first calving; animal breeding; calving interval; crossbreeding; pure breeding criação de animais; cruzamento; mestiços; raça pura |
title_short |
Age at first calving and calving interval of holstein friesian and crossbred holstein friesian: Gir cows |
title_full |
Age at first calving and calving interval of holstein friesian and crossbred holstein friesian: Gir cows |
title_fullStr |
Age at first calving and calving interval of holstein friesian and crossbred holstein friesian: Gir cows |
title_full_unstemmed |
Age at first calving and calving interval of holstein friesian and crossbred holstein friesian: Gir cows |
title_sort |
Age at first calving and calving interval of holstein friesian and crossbred holstein friesian: Gir cows |
author |
Freitas, Ary Ferreira de |
author_facet |
Freitas, Ary Ferreira de Madalena, Fernando Enrique Martinez, Mário Luiz |
author_role |
author |
author2 |
Madalena, Fernando Enrique Martinez, Mário Luiz |
author2_role |
author author |
dc.contributor.none.fl_str_mv |
|
dc.contributor.author.fl_str_mv |
Freitas, Ary Ferreira de Madalena, Fernando Enrique Martinez, Mário Luiz |
dc.subject.por.fl_str_mv |
age at first calving; animal breeding; calving interval; crossbreeding; pure breeding criação de animais; cruzamento; mestiços; raça pura |
topic |
age at first calving; animal breeding; calving interval; crossbreeding; pure breeding criação de animais; cruzamento; mestiços; raça pura |
description |
Ages at first calving of 52 Holstein-Friesian (HPB) cows, 69 1/2 HPB: 1/2 Gir (F1) and 66 3/4 HPB: 1/4 Gir (B1) were compared. The animals of all three groups were maintained together in the same herd. Artificial insemination with fresh semen was mainly used, and also natural mating, with HPB bulls for HPB and F1 cows, and F1 bulls for B1 cows. The model for age at first calving included the effects (fixed) of year-season of birth of cow genetic group and the interaction of both effects. Only genetic group effects were significant (P<0.05). The model for calving interval induded the effect of year and season of calving, genetic group, two and three factor interactions of these effects, and linear and quadratic regression on parity. The season x genetic group interaction was significant (P = 0.05). The relation between interval (E) and parity (N) was described by the equation E = 576.21-41.23 N + 4.83 N2, indicating that the minimum interval was attained at the 4th calving. |
publishDate |
2014 |
dc.date.none.fl_str_mv |
2014-04-15 |
dc.type.none.fl_str_mv |
|
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
https://seer.sct.embrapa.br/index.php/pab/article/view/16470 |
url |
https://seer.sct.embrapa.br/index.php/pab/article/view/16470 |
dc.language.iso.fl_str_mv |
por |
language |
por |
dc.relation.none.fl_str_mv |
https://seer.sct.embrapa.br/index.php/pab/article/view/16470/10745 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf |
dc.publisher.none.fl_str_mv |
Pesquisa Agropecuaria Brasileira Pesquisa Agropecuária Brasileira |
publisher.none.fl_str_mv |
Pesquisa Agropecuaria Brasileira Pesquisa Agropecuária Brasileira |
dc.source.none.fl_str_mv |
Pesquisa Agropecuaria Brasileira; v.15, n.1, jan. 1980; 101-105 Pesquisa Agropecuária Brasileira; v.15, n.1, jan. 1980; 101-105 1678-3921 0100-104x reponame:Pesquisa Agropecuária Brasileira (Online) instname:Empresa Brasileira de Pesquisa Agropecuária (Embrapa) instacron:EMBRAPA |
instname_str |
Empresa Brasileira de Pesquisa Agropecuária (Embrapa) |
instacron_str |
EMBRAPA |
institution |
EMBRAPA |
reponame_str |
Pesquisa Agropecuária Brasileira (Online) |
collection |
Pesquisa Agropecuária Brasileira (Online) |
repository.name.fl_str_mv |
Pesquisa Agropecuária Brasileira (Online) - Empresa Brasileira de Pesquisa Agropecuária (Embrapa) |
repository.mail.fl_str_mv |
pab@sct.embrapa.br || sct.pab@embrapa.br |
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1793416708309909504 |