|
|
| Acesso ao texto completo restrito à biblioteca da Embrapa Caprinos e Ovinos. Para informações adicionais entre em contato com cnpc.biblioteca@embrapa.br. |
Registro Completo |
Biblioteca(s): |
Embrapa Caprinos e Ovinos. |
Data corrente: |
10/02/2020 |
Data da última atualização: |
28/04/2020 |
Tipo da produção científica: |
Artigo em Periódico Indexado |
Autoria: |
FERREIRA, T. A.; MARTINSA, P. G. M. A.; GOUVEIA, G. C.; ABREU, L. R. A.; GOUVEIA, A. M. G.; FACO, O.; COLOSIMO, E. A.; FURUSHO-GARCIA, I. F.; PEREIRA, I. G. |
Afiliação: |
TALITA A. FERREIRA, Federal University of Jequitinhonha and Mucuri Valleys (UFVJM) - Diamantina, MG, Brazil; Federal University of Minas Gerais (UFMG) - Belo Horizonte, MG, Brazil; PAULO G.M.A. MARTINSA, Federal University of Jequitinhonha and Mucuri Valleys (UFVJM) - Diamantina, MG, Brazil; GABRIELA C. GOUVEIA, Federal University of Minas Gerais (UFMG) - Belo Horizonte, MG, Brazil; LUÍZA R.A. ABREU, Federal University of Minas Gerais (UFMG) - Belo Horizonte, MG, Brazil; AURORA M.G. GOUVEIA, Federal University of Minas Gerais (UFMG) - Belo Horizonte, MG, Brazil; OLIVARDO FACO, CNPC; ENRICO A. COLOSIMO, Federal University of Minas Gerais (UFMG) - Belo Horizonte, MG, Brazil; IRAIDES F. FURUSHO-GARCIA, Federal University of Minas Gerais (UFMG) - Belo Horizonte, MG, Brazil; IDALMO G. PEREIRA, Federal University of Minas Gerais (UFMG) - Belo Horizonte, MG, Brazil. |
Título: |
Proportional hazard models associated with the survival of dairy goats reared in a tropical environment. |
Ano de publicação: |
2020 |
Fonte/Imprenta: |
Small Ruminant Research, v. 184, Mar. 2020. |
DOI: |
https://doi.org/10.1016/j.smallrumres.2020.106063 |
Idioma: |
Inglês |
Conteúdo: |
Abstract: Increasing the functional life of a doe in order to keep the most productive females in the herd as long as possible can result in a reduction of replacement costs because of the better utilization of the animal in the production system. Thus, the objective was to evaluate the influence of environment effect, and morphometric and type traits on the culling that limits the stay of a doe of an exotic dairy goat breed reared in a tropical climate in the herd (stayability). The data utilized in the present study had information of 1439 Saanen does, born between 2000 and 2015, from 17 herds. The stay in the herd for longer than 28 months of age (STAY28), that is lack of culling, was defined as successful; the does? records were then not censored (C?=?1). On the other hand, does kept in the herd for less than 28 months had their records censored (C?=?0), once we considered that she still would kid. Does sold to other farmers were considered censored. Information regarding birth year, birth season, herd, six morphometric traits, and 12 visual appraisal-scored traits were evaluated. The Cox proportional hazard rate and the Kaplan-Meier models were fitted to analyze the data. Birth year, body length, rump width, feet and legs soundness, udder, and teat conformation were the traits that affected STAY28. For each birth year, body length, and rump width, reductions of 4 %, 2 %, and 5 % were observed on the culling hazard of a doe, respectively. Does with great scores for traits related to the mammary system were prematurely culled from the herd. In conclusion, STAY28 can be used as a selection criterion based on the aforementioned morphological and type traits, since it is effective to early detect individuals that will stay longer and more productive in a herd. Therefore, these traits should be considered in breeding programs. MenosAbstract: Increasing the functional life of a doe in order to keep the most productive females in the herd as long as possible can result in a reduction of replacement costs because of the better utilization of the animal in the production system. Thus, the objective was to evaluate the influence of environment effect, and morphometric and type traits on the culling that limits the stay of a doe of an exotic dairy goat breed reared in a tropical climate in the herd (stayability). The data utilized in the present study had information of 1439 Saanen does, born between 2000 and 2015, from 17 herds. The stay in the herd for longer than 28 months of age (STAY28), that is lack of culling, was defined as successful; the does? records were then not censored (C?=?1). On the other hand, does kept in the herd for less than 28 months had their records censored (C?=?0), once we considered that she still would kid. Does sold to other farmers were considered censored. Information regarding birth year, birth season, herd, six morphometric traits, and 12 visual appraisal-scored traits were evaluated. The Cox proportional hazard rate and the Kaplan-Meier models were fitted to analyze the data. Birth year, body length, rump width, feet and legs soundness, udder, and teat conformation were the traits that affected STAY28. For each birth year, body length, and rump width, reductions of 4 %, 2 %, and 5 % were observed on the culling hazard of a doe, respectively. Does with great scores for trait... Mostrar Tudo |
Palavras-Chave: |
Caprino leiteiro; Conformação corporal; Conformation traits; Survival analysis. |
Thesagro: |
Cabra Leiteira; Eficiência Reprodutiva; Longevidade; Melhoramento Genético Animal; Sobrevivência. |
Thesaurus Nal: |
Brazil; Dairy goats; Longevity; Reproductive performance; Saanen; Survival rate. |
Categoria do assunto: |
G Melhoramento Genético |
Marc: |
LEADER 03074naa a2200409 a 4500 001 2120068 005 2020-04-28 008 2020 bl uuuu u00u1 u #d 024 7 $ahttps://doi.org/10.1016/j.smallrumres.2020.106063$2DOI 100 1 $aFERREIRA, T. A. 245 $aProportional hazard models associated with the survival of dairy goats reared in a tropical environment.$h[electronic resource] 260 $c2020 520 $aAbstract: Increasing the functional life of a doe in order to keep the most productive females in the herd as long as possible can result in a reduction of replacement costs because of the better utilization of the animal in the production system. Thus, the objective was to evaluate the influence of environment effect, and morphometric and type traits on the culling that limits the stay of a doe of an exotic dairy goat breed reared in a tropical climate in the herd (stayability). The data utilized in the present study had information of 1439 Saanen does, born between 2000 and 2015, from 17 herds. The stay in the herd for longer than 28 months of age (STAY28), that is lack of culling, was defined as successful; the does? records were then not censored (C?=?1). On the other hand, does kept in the herd for less than 28 months had their records censored (C?=?0), once we considered that she still would kid. Does sold to other farmers were considered censored. Information regarding birth year, birth season, herd, six morphometric traits, and 12 visual appraisal-scored traits were evaluated. The Cox proportional hazard rate and the Kaplan-Meier models were fitted to analyze the data. Birth year, body length, rump width, feet and legs soundness, udder, and teat conformation were the traits that affected STAY28. For each birth year, body length, and rump width, reductions of 4 %, 2 %, and 5 % were observed on the culling hazard of a doe, respectively. Does with great scores for traits related to the mammary system were prematurely culled from the herd. In conclusion, STAY28 can be used as a selection criterion based on the aforementioned morphological and type traits, since it is effective to early detect individuals that will stay longer and more productive in a herd. Therefore, these traits should be considered in breeding programs. 650 $aBrazil 650 $aDairy goats 650 $aLongevity 650 $aReproductive performance 650 $aSaanen 650 $aSurvival rate 650 $aCabra Leiteira 650 $aEficiência Reprodutiva 650 $aLongevidade 650 $aMelhoramento Genético Animal 650 $aSobrevivência 653 $aCaprino leiteiro 653 $aConformação corporal 653 $aConformation traits 653 $aSurvival analysis 700 1 $aMARTINSA, P. G. M. A. 700 1 $aGOUVEIA, G. C. 700 1 $aABREU, L. R. A. 700 1 $aGOUVEIA, A. M. G. 700 1 $aFACO, O. 700 1 $aCOLOSIMO, E. A. 700 1 $aFURUSHO-GARCIA, I. F. 700 1 $aPEREIRA, I. G. 773 $tSmall Ruminant Research$gv. 184, Mar. 2020.
Download
Esconder MarcMostrar Marc Completo |
Registro original: |
Embrapa Caprinos e Ovinos (CNPC) |
|
Biblioteca |
ID |
Origem |
Tipo/Formato |
Classificação |
Cutter |
Registro |
Volume |
Status |
URL |
Voltar
|
|
Registro Completo
Biblioteca(s): |
Embrapa Caprinos e Ovinos. |
Data corrente: |
19/02/2014 |
Data da última atualização: |
13/04/2015 |
Tipo da produção científica: |
Artigo em Periódico Indexado |
Circulação/Nível: |
B - 1 |
Autoria: |
LOPES, F. B.; SILVA, M. C. da; MIYAGI, E. S.; FIORAVANTI, M. C. S.; FACO, O.; McMANUS, C. |
Afiliação: |
Fernando Brito Lopes, Pós-graduação - Universidade Federal de Goiás (UFG) - Goiânia, Goiás, Brazil; Marcelo Corrêa da Silva, Pós-graduação - UFG - Goiânia, Goiás, Brazil; Eliane Sayuri Miyagi, Pós-graduação - UFG - Goiânia, Goiás, Brazil; Maria Clorinda Soares Fioravanti, Pós-graduação - UFG - Goiânia, Goiás, Brazil; OLIVARDO FACO, CNPC; Concepta McManus, Universidade Federal do Rio Grande do Sul (UFRGS) - Porto Alegre, RS, Brazil. |
Título: |
Comparison of selection indexes for dairy goats in the tropics. |
Ano de publicação: |
2013 |
Fonte/Imprenta: |
Acta Scientiarum. Animal Sciences, Maringá, v. 35, n. 3, p. 321-328, July/Sept. 2013. |
DOI: |
http://dx.doi.org/10.4025/actascianimsci.v35i3.16049 |
Idioma: |
Inglês |
Conteúdo: |
Abstract: The selection process in dairy goat was evaluated by selection indexes. Basal population of 1,000 does, randomly mated by 50 unselected and unrelated bucks, was simulated. Eight selection indexes in two production systems (intensive - indexes I-IV and semi-intensive - indexes V-XIII) were compared. Three groups of dairy goats (A, B and C) were simulated with a respective intensity of 10, 25 and 50%. Each group was composed of five generations and each generation was replicated 20 times. All traits were simulated using matrices of direct additive genetic and the residual (co)variance and the effect of Mendelian segregation. Statistical analyses were performed by repeated measurements in time. Selection using the suggested indexes improved all traits. Selection indexes III and VII are suggested due to simultaneous production and reproduction trait improvement. Indexes IV and VIII are recommended when higher rates of total solids and somatic cell count occur and would correspond to differentiated payment for the milk. [Comparação de índices de seleção de caprinos leiteiros em regiões tropicais]. Resumo: Objetivou-se avaliar o processo de seleção de caprinos leiteiros utilizando-se índices de seleção. Foi simulada população a base composta por 1.000 fêmeas, acasaladas aleatoriamente com 50 reprodutores, não selecionados e não aparentados. Foram comparados oito índices de seleção em cada sistema de criação: intensivo (índices I-IV) e semi-intensivo (índices V-VIII). Foram simulados três grupos de caprinos leiteiros (A, B e C), utilizando-se intensidade de seleção de 10, 25 e 50%, respectivamente. Cada grupo foi composto por cinco gerações e cada geração foi replicada 20 vezes. Todas as características foram simuladas utilizando-se as matrizes de (co) variância genética aditiva direta, residual e o efeito da segregação Mendeliana. As análises estatísticas foram realizadas por meio de medidas repetidas no tempo. A seleção realizada por meio dos índices propostos promoveu melhorias em todas as características. Sugere-se a utilização dos índices III e VII, por promoverem melhorias simultâneas nas características produtivas e reprodutivas. Da mesma forma, sugere-se a utilização dos índices IV e VIII havendo pagamento diferenciado por maiores teores de sólidos totais e à contagem de células somáticas. MenosAbstract: The selection process in dairy goat was evaluated by selection indexes. Basal population of 1,000 does, randomly mated by 50 unselected and unrelated bucks, was simulated. Eight selection indexes in two production systems (intensive - indexes I-IV and semi-intensive - indexes V-XIII) were compared. Three groups of dairy goats (A, B and C) were simulated with a respective intensity of 10, 25 and 50%. Each group was composed of five generations and each generation was replicated 20 times. All traits were simulated using matrices of direct additive genetic and the residual (co)variance and the effect of Mendelian segregation. Statistical analyses were performed by repeated measurements in time. Selection using the suggested indexes improved all traits. Selection indexes III and VII are suggested due to simultaneous production and reproduction trait improvement. Indexes IV and VIII are recommended when higher rates of total solids and somatic cell count occur and would correspond to differentiated payment for the milk. [Comparação de índices de seleção de caprinos leiteiros em regiões tropicais]. Resumo: Objetivou-se avaliar o processo de seleção de caprinos leiteiros utilizando-se índices de seleção. Foi simulada população a base composta por 1.000 fêmeas, acasaladas aleatoriamente com 50 reprodutores, não selecionados e não aparentados. Foram comparados oito índices de seleção em cada sistema de criação: intensivo (índices I-IV) e semi-intensivo (índices V-VIII). For... Mostrar Tudo |
Palavras-Chave: |
Critério de seleção; Primeiro parto. |
Thesagro: |
Cabra leiteira; Caprino; Leite; Melhoramento genético animal; Seleção genética. |
Thesaurus NAL: |
Breeding; dairy goats; Goats; Milk; Selection criteria; total solids. |
Categoria do assunto: |
G Melhoramento Genético |
URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/97751/1/api-Comparison-of-selection.pdf
|
Marc: |
LEADER 03404naa a2200349 a 4500 001 1980515 005 2015-04-13 008 2013 bl uuuu u00u1 u #d 024 7 $ahttp://dx.doi.org/10.4025/actascianimsci.v35i3.16049$2DOI 100 1 $aLOPES, F. B. 245 $aComparison of selection indexes for dairy goats in the tropics.$h[electronic resource] 260 $c2013 520 $aAbstract: The selection process in dairy goat was evaluated by selection indexes. Basal population of 1,000 does, randomly mated by 50 unselected and unrelated bucks, was simulated. Eight selection indexes in two production systems (intensive - indexes I-IV and semi-intensive - indexes V-XIII) were compared. Three groups of dairy goats (A, B and C) were simulated with a respective intensity of 10, 25 and 50%. Each group was composed of five generations and each generation was replicated 20 times. All traits were simulated using matrices of direct additive genetic and the residual (co)variance and the effect of Mendelian segregation. Statistical analyses were performed by repeated measurements in time. Selection using the suggested indexes improved all traits. Selection indexes III and VII are suggested due to simultaneous production and reproduction trait improvement. Indexes IV and VIII are recommended when higher rates of total solids and somatic cell count occur and would correspond to differentiated payment for the milk. [Comparação de índices de seleção de caprinos leiteiros em regiões tropicais]. Resumo: Objetivou-se avaliar o processo de seleção de caprinos leiteiros utilizando-se índices de seleção. Foi simulada população a base composta por 1.000 fêmeas, acasaladas aleatoriamente com 50 reprodutores, não selecionados e não aparentados. Foram comparados oito índices de seleção em cada sistema de criação: intensivo (índices I-IV) e semi-intensivo (índices V-VIII). Foram simulados três grupos de caprinos leiteiros (A, B e C), utilizando-se intensidade de seleção de 10, 25 e 50%, respectivamente. Cada grupo foi composto por cinco gerações e cada geração foi replicada 20 vezes. Todas as características foram simuladas utilizando-se as matrizes de (co) variância genética aditiva direta, residual e o efeito da segregação Mendeliana. As análises estatísticas foram realizadas por meio de medidas repetidas no tempo. A seleção realizada por meio dos índices propostos promoveu melhorias em todas as características. Sugere-se a utilização dos índices III e VII, por promoverem melhorias simultâneas nas características produtivas e reprodutivas. Da mesma forma, sugere-se a utilização dos índices IV e VIII havendo pagamento diferenciado por maiores teores de sólidos totais e à contagem de células somáticas. 650 $aBreeding 650 $adairy goats 650 $aGoats 650 $aMilk 650 $aSelection criteria 650 $atotal solids 650 $aCabra leiteira 650 $aCaprino 650 $aLeite 650 $aMelhoramento genético animal 650 $aSeleção genética 653 $aCritério de seleção 653 $aPrimeiro parto 700 1 $aSILVA, M. C. da 700 1 $aMIYAGI, E. S. 700 1 $aFIORAVANTI, M. C. S. 700 1 $aFACO, O. 700 1 $aMcMANUS, C. 773 $tActa Scientiarum. Animal Sciences, Maringá$gv. 35, n. 3, p. 321-328, July/Sept. 2013.
Download
Esconder MarcMostrar Marc Completo |
Registro original: |
Embrapa Caprinos e Ovinos (CNPC) |
|
Biblioteca |
ID |
Origem |
Tipo/Formato |
Classificação |
Cutter |
Registro |
Volume |
Status |
Fechar
|
Expressão de busca inválida. Verifique!!! |
|
|