| |
|
|
| Registros recuperados : 78 | |
| 26. |  | SANTANA JUNIOR, M. L.; ELER, J. P.; BIGNARDI, A. B.; MENÉNDEZ-BUXADERA, A.; CARDOSO, F. F.; FERRAZ, J. B. S. Multi-trait linear reaction norm model to describe the pattern of phenotypic expression of some economic traits in beef cattle across a range of environments. Journal of Applied Genetics, v. 56, n. 2, p. 219-229, May 2015.| Biblioteca(s): Embrapa Pecuária Sul. |
|    |
| 27. | | PETRINI, J.; DIAS, R. A. P.; PERTILE, S. F. N.; ELER, J. P.; FERRAZ, J. B. S.; MOURÃO, G. B. Degree of multicollinearity and variables involved in linear dependence in additive-dominant models. Pesquisa Agropecuária Brasileira, Brasília, DF, v. 47, n. 12, p. 1743-1750, dez. 2012. Título em português: Grau de multicolinearidade e variáveis envolvidas na dependência linear em modelos aditivo-dominantes.| Biblioteca(s): Embrapa Unidades Centrais. |
| |
| 29. | | SANTANA JUNIOR, M. L.; ELER, J. P.; CARDOSO, F. F.; ALBUQUERQUE, L. G.; BIGNARDI, A. B.; FERRAZ, J. B. S. Genotype by environment interaction for birth and weaning weights of composite beef cattle in different regions of Brazil Livestock Production Science, Amsterdam, v. 149, n. 3, p. 242-249, Nov. 2012.| Biblioteca(s): Embrapa Pecuária Sul. |
|  |
| 30. | | SANTANA JUNIOR, M. L.; BIGNARDI, A. B.; ELER, J. P.; CARDOSO, F. F.; FERRAZ, J. B. S. Genotype by environment interaction and model comparison for growth traits of Santa Ines sheep. Journal of Animal Breeding and Genetics, Berlin, DE, v. 130, n. 5, p. 394-403, Oct. 2013. Publicado online em 24 jan. 2013.| Biblioteca(s): Embrapa Pecuária Sul. |
| |
| 31. | | SANTANA JÚNIOR, M. L.; PEDROSA, V. B.; GROENEVELD, E.; FERRAZ, J. B. S.; CARDOSO, F. F.; ELER, J. P. Genotype x environment interaction for growth and reproduction traits of composite beef cattle in Brazil. In: WORLD CONGRESS ON GENETICS APPLIED TO LIVESTOCK PRODUCTION, 9., 2010, Leipzig. Proceedings... Leipzig: German Society of Animal Science, 2010. 1 CD-ROM.| Biblioteca(s): Embrapa Pecuária Sul. |
| |
| 32. | | SANTANA, H. A.; GOMES, R. da C.; SILVA, S. L.; FERRAZ, J. B. S.; LEME, P. R. Performance, feed efficiency and ultrasound carcass traits of Nellore cattle with different classes of residual gain. Journal of Animal Science v.90, (Supplement 3/J); Journal of Dairy Science, v.95, (Supplement 2), p.97-98, 2012. Edição dos trabalhos do ADSA-PSA-AMPA-ASAS-CSAS-WSASAS JOINT ANNUAL MEETING, 2012, Phoenix-AR. Ruminant Nutrition: Beef I. M262.| Biblioteca(s): Embrapa Gado de Corte. |
| |
| 33. | | SANTANA JÚNIOR, M. L.; ELER, J. P.; CARDOSO, F. F.; ALBUQUERQUE, L. G.; FERRAZ, J. B. S. Phenotypic plasticity of composite beef cattle performance using reaction norms model with unknown covariate. Animal, Cambridge, v. 7, n. 2, p. 202-210, Feb. 2013. Firstview article 27 set. 2012.| Biblioteca(s): Embrapa Pecuária Sul. |
| |
| 34. | | PEDROSA, V. B.; SANTANA JUNIOR, M. L.; OLIVEIRA, P. S.; ELER, J. P.; FERRAZ, J. B. S. Population structure and inbreeding effects on growth traits of Santa Ines sheep in Brazil. Small Ruminant Research, Amsterdam, v. 93, n. 2/3, p. 135-139, Oct. 2010.| Biblioteca(s): Embrapa Caprinos e Ovinos. |
| |
| 35. | | CANCIAN, P. H.; SILVA, S. L.; LANNI, A. C.; MANICARDI, F. R.; GOMES, R. da C.; FERRAZ, J. B. S. Relationships among visual scores with feedlot performance and feed efficiency in Bos indicus cattle. Journal of Animal Science v.90, (Supplement 3/J); Journal of Dairy Science, v.95, (Supplement 2), p.270, 2012. Edição dos trabalhos do: ADSA-PSA-AMPA-ASAS-CSAS-WSASAS JOINT ANNUAL MEETING, 2012, Phoenix-AR. Breeding and Genetics: Applications and Methods in Animal Breeding. T51| Biblioteca(s): Embrapa Gado de Corte. |
| |
| 37. | | SILVA, M. V. G. B.; BERGMANN, J. A. G.; MARTINEZ, M. L.; PEREIRA, C. S.; FERRAZ, J. B. S. Utilizacao de modelos animais Uni e Bivariados no estudo da eficiencia reprodutiva e produtiva na raca holandes. Brasilia: SBZ, 1995. p.637-639. In: REUNIAO ANUAL DA SOCIEDADE BRASILEIRA DE ZOOTECNIA, 32., 1995, Brasilia. Anais... Brasilia: SBZ, 1995.| Biblioteca(s): Embrapa Gado de Leite. |
| |
| 38. | | OLIVEIRA JUNIOR, G. A.; REY, F. S. B.; SILVA, M. V. G. B.; SANTANA, M. H. A.; ALEXANDRE, P. A.; ELER, J. P.; FERRAZ, J. B. S. Analysis of copy number variation regions in a Nellore population evaluated for feed efficiency. In: WORLD CONGRESS ON GENETICS APPLIED TO LIVESTOCK PRODUCTION, 10., 2014, Vancouver. Proceedings... Champaign: ASAS, 2014. 3 p.| Biblioteca(s): Embrapa Gado de Leite. |
| |
| 39. | | OLIVEIRA JUNIOR, G. A.; VENTURA, R.; FREITAS, B. G. de; SANTANA, M. H. A.; SILVA, M. V. G. B.; FERRAZ, J. B. S.; GARRICK, D. J. Genome-wide association study in reproductive trait of Nellore heifers. In: PLANT & ANIMAL GENOME, 24., 2016, San Diego. [Proceedings...] San Diego: [s.n.], 2016.| Biblioteca(s): Embrapa Gado de Leite. |
| |
| 40. | | SALVIAN, M.; RAMÍREZ-DÍAZ, J.; CUCCO, D. C.; SANTANA, M. H.; BONIN, M. N.; GOMES, R. da C.; FERRAZ, J. B. S.; MOURÃO, G. B. Multivariate analyses of live-animal ultrasound carcass traits of composite cattle. In: ANNUAL MEETING BRAZILIAN SOCIETY OF ANIMAL SCIENCE, 50., 2013, Campinas. The integration of Knowledge in animal production - abstracts. Campinas: SBZ, 2013 1 CD ROM| Biblioteca(s): Embrapa Gado de Corte. |
| |
| Registros recuperados : 78 | |
|
|
|
Registro Completo
|
Biblioteca(s): |
Embrapa Pecuária Sudeste. |
|
Data corrente: |
16/05/2012 |
|
Data da última atualização: |
23/02/2023 |
|
Tipo da produção científica: |
Artigo em Periódico Indexado |
|
Circulação/Nível: |
B - 1 |
|
Autoria: |
PANETTO, J. C. C.; VAL, J. E.; MARCONDES, C. R.; PEIXOTO, M. G. C. D.; VERNEQUE, R. da S.; FERRAZ, J. B. S.; GOLDEN, B. L. |
|
Afiliação: |
J. C. C. PANETTO, CALIFORNIA POLYTECHINIC STATE UNIVERSITY; J. E. VAL, FACULDADE DE MEDICINA DE RIBEIRAO PRETO/ RIBEIRÃO PRETO; CINTIA RIGHETTI MARCONDES, CPPSE; MARIA GABRIELA CAMPOLINA D PEIXOTO, CNPGL; RUI DA SILVA VERNEQUE, CNPGL; J.B.S. FERRAZ, FACULDADE DE ZOOTECNIA E ENGENHARIA DE ALIMENTOS/PIRASSUNUNGA; B. L. GOLDEN, CALIFORNIA POLYTECHNIC STATE UNIVERSITY /SAN LUIS OBISPO. |
|
Título: |
Female fertility in a Guzerat dairy subpopulation: heterogeneity of variance components for calving intervals. |
|
Ano de publicação: |
2012 |
|
Fonte/Imprenta: |
Livestock Science, v. 145, n. 1-3, p. 87-94, may 2012. |
|
ISSN: |
1871-1413 |
|
DOI: |
10.1016/j.livsci.2012.01.002 |
|
Idioma: |
Inglês |
|
Conteúdo: |
The objectives of the present study were to determine if variance components of calving intervals varied with age at calving and if considering calving intervals as a longitudinal trait would be a useful approach for fertility analysis of Zebu dairy herds. With these purposes, calving records from females born from 1940 to 2006 in a Guzerat dairy subpopulation in Brazil were analyzed. The fixed effects of contemporary groups, formed by year and farm at birth or at calving, and the regressions of age at calving, equivalent inbreeding coefficient and day of the year on the studied traits were considered in the statistical models. In one approach, calving intervals(CI) were analyzed as a single trait, by fitting a statistical model on which both animal and permanent environment effects were adjusted for the effect of age at calving by random regression. In a second approach, a four-trait analysis was conducted, including age at first calving (AFC) and three different female categories for the calving intervals: first calving females; young females (less than 80 months old, but not first calving); or mature females (80 months old or more). Finally, a two-trait analysis was performed, also including AFC and CI, but calving intervals were regarded as a single trait in a repeatability model. Additionally, the ranking of sires was compared among approaches. Calving intervals decreased with age until females were about 80 months old, remaining nearly constant after that age. A quasilinear increase of 11.5 days on the calving intervals was observed for each 10% increase in the female's equivalent inbreeding coefficient. The heritability of AFC was 0.37. For CI, the genetic-phenotypic variance ratios ranged from 0.064 to 0.141, depending on the approach, and on ages at calving. Differences among genetic variance components for calving intervals were observed along the animal's lifetime. Those differences confirmed the longitudinal aspect of that trait, indicating the importance of such consideration when accessing fertility of Zebu dairy females, especially in situations where the available information relies on their calving intervals. Spearman rank correlations among approaches ranged from 0.90 to 0.95, and changes observed in the ranking of sires suggested that the genetic progress of the population could be affected by the approach chosen for the analysis of calving intervals. MenosThe objectives of the present study were to determine if variance components of calving intervals varied with age at calving and if considering calving intervals as a longitudinal trait would be a useful approach for fertility analysis of Zebu dairy herds. With these purposes, calving records from females born from 1940 to 2006 in a Guzerat dairy subpopulation in Brazil were analyzed. The fixed effects of contemporary groups, formed by year and farm at birth or at calving, and the regressions of age at calving, equivalent inbreeding coefficient and day of the year on the studied traits were considered in the statistical models. In one approach, calving intervals(CI) were analyzed as a single trait, by fitting a statistical model on which both animal and permanent environment effects were adjusted for the effect of age at calving by random regression. In a second approach, a four-trait analysis was conducted, including age at first calving (AFC) and three different female categories for the calving intervals: first calving females; young females (less than 80 months old, but not first calving); or mature females (80 months old or more). Finally, a two-trait analysis was performed, also including AFC and CI, but calving intervals were regarded as a single trait in a repeatability model. Additionally, the ranking of sires was compared among approaches. Calving intervals decreased with age until females were about 80 months old, remaining nearly constant after that age. A quasil... Mostrar Tudo |
|
Palavras-Chave: |
Daiary cattle; Genetic evaluation; Heterogeneous variance. |
|
Thesaurus NAL: |
calving interval; female fertility. |
|
Categoria do assunto: |
L Ciência Animal e Produtos de Origem Animal |
|
URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/59407/1/PROCI-2012.00025.pdf
|
|
Marc: |
LEADER 03268naa a2200277 a 4500
001 1924692
005 2023-02-23
008 2012 bl uuuu u00u1 u #d
022 $a1871-1413
024 7 $a10.1016/j.livsci.2012.01.002$2DOI
100 1 $aPANETTO, J. C. C.
245 $aFemale fertility in a Guzerat dairy subpopulation$bheterogeneity of variance components for calving intervals.$h[electronic resource]
260 $c2012
520 $aThe objectives of the present study were to determine if variance components of calving intervals varied with age at calving and if considering calving intervals as a longitudinal trait would be a useful approach for fertility analysis of Zebu dairy herds. With these purposes, calving records from females born from 1940 to 2006 in a Guzerat dairy subpopulation in Brazil were analyzed. The fixed effects of contemporary groups, formed by year and farm at birth or at calving, and the regressions of age at calving, equivalent inbreeding coefficient and day of the year on the studied traits were considered in the statistical models. In one approach, calving intervals(CI) were analyzed as a single trait, by fitting a statistical model on which both animal and permanent environment effects were adjusted for the effect of age at calving by random regression. In a second approach, a four-trait analysis was conducted, including age at first calving (AFC) and three different female categories for the calving intervals: first calving females; young females (less than 80 months old, but not first calving); or mature females (80 months old or more). Finally, a two-trait analysis was performed, also including AFC and CI, but calving intervals were regarded as a single trait in a repeatability model. Additionally, the ranking of sires was compared among approaches. Calving intervals decreased with age until females were about 80 months old, remaining nearly constant after that age. A quasilinear increase of 11.5 days on the calving intervals was observed for each 10% increase in the female's equivalent inbreeding coefficient. The heritability of AFC was 0.37. For CI, the genetic-phenotypic variance ratios ranged from 0.064 to 0.141, depending on the approach, and on ages at calving. Differences among genetic variance components for calving intervals were observed along the animal's lifetime. Those differences confirmed the longitudinal aspect of that trait, indicating the importance of such consideration when accessing fertility of Zebu dairy females, especially in situations where the available information relies on their calving intervals. Spearman rank correlations among approaches ranged from 0.90 to 0.95, and changes observed in the ranking of sires suggested that the genetic progress of the population could be affected by the approach chosen for the analysis of calving intervals.
650 $acalving interval
650 $afemale fertility
653 $aDaiary cattle
653 $aGenetic evaluation
653 $aHeterogeneous variance
700 1 $aVAL, J. E.
700 1 $aMARCONDES, C. R.
700 1 $aPEIXOTO, M. G. C. D.
700 1 $aVERNEQUE, R. da S.
700 1 $aFERRAZ, J. B. S.
700 1 $aGOLDEN, B. L.
773 $tLivestock Science$gv. 145, n. 1-3, p. 87-94, may 2012.
Download
Esconder MarcMostrar Marc Completo |
|
Registro original: |
Embrapa Pecuária Sudeste (CPPSE) |
|
|
Biblioteca |
ID |
Origem |
Tipo/Formato |
Classificação |
Cutter |
Registro |
Volume |
Status |
Fechar
|
| Nenhum registro encontrado para a expressão de busca informada. |
|
|
