Age at first calving and calving interval of holstein friesian and crossbred holstein friesian: Gir cows

Detalhes bibliográficos
Autor(a) principal: Freitas, Ary Ferreira de
Data de Publicação: 2014
Outros Autores: Madalena, Fernando Enrique, Martinez, Mário Luiz
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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spelling 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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