|
|
Registro Completo |
Biblioteca(s): |
Embrapa Cerrados. |
Data corrente: |
18/03/2003 |
Data da última atualização: |
18/03/2003 |
Autoria: |
MAGNABOSCO, C. D. U.; OJALA, M.; LOS REYES, A. de; SAINZ, R. D.; FERNANDES, A.; FAMULA, T. R. |
Título: |
Estimates of environmental effects and genetic parameters for body measurements and weight in Brahaman cattle raised in Mexico. |
Ano de publicação: |
2002 |
Fonte/Imprenta: |
Journal of Animal Breeding and Genetics, Berlin, v. 119, p. 221-228, 2002. |
Idioma: |
Inglês |
Conteúdo: |
A Derivative Free Restricted Maximum Likelihood (DFREML) algorithm was used with single trait and two animal models to estimate the variance and covariance components and thus, heritabilities and phenotypic, genetic and environmental correlations among nine different body measurements and weights of Brahman cattle raised in Mexico. The following measurements were considered: hip width, pin width, hip-pin width, anterior height, posterior height, body lenght, thorax perimeter, scrotal, circumference and weight. The analysis was based on a total of 1018 animals, born between 1992 and 1995, from 17 herds in the Mexico States of Chiapas, San Luis Potosi, Tabasco, Tamaulipas and Veracruz. The model included the following fixed effects: herd, year-season of birth, sex, age of the animal and feed management. The only random effect was the direct additive genetic contribuition of each animal. All fixed effects in the model were significant for all traits (p<0.05). Estimated heritabilities for the traits were: hip width 0.57, pin width 0.32, hip-pin width 0.41, anterior height 0.56, posterior height 0.54, body lenght 0.32, thorax perimeter 0.49, scrotal circumference 0.02 and weigth 0.66. The magnitude of the heritabilities was medium to high, with the exception of scrotal circumference. The genetic correlations among all body measurements were consistently positive and high, ranging from 0.64 to 1.00. Although other measures showed higher genetic correlations with weight, thorax perimeter combines a high value (0.70) with ease and repeatability, making it a useful field measurement to estimate body weight when scales are not available. MenosA Derivative Free Restricted Maximum Likelihood (DFREML) algorithm was used with single trait and two animal models to estimate the variance and covariance components and thus, heritabilities and phenotypic, genetic and environmental correlations among nine different body measurements and weights of Brahman cattle raised in Mexico. The following measurements were considered: hip width, pin width, hip-pin width, anterior height, posterior height, body lenght, thorax perimeter, scrotal, circumference and weight. The analysis was based on a total of 1018 animals, born between 1992 and 1995, from 17 herds in the Mexico States of Chiapas, San Luis Potosi, Tabasco, Tamaulipas and Veracruz. The model included the following fixed effects: herd, year-season of birth, sex, age of the animal and feed management. The only random effect was the direct additive genetic contribuition of each animal. All fixed effects in the model were significant for all traits (p<0.05). Estimated heritabilities for the traits were: hip width 0.57, pin width 0.32, hip-pin width 0.41, anterior height 0.56, posterior height 0.54, body lenght 0.32, thorax perimeter 0.49, scrotal circumference 0.02 and weigth 0.66. The magnitude of the heritabilities was medium to high, with the exception of scrotal circumference. The genetic correlations among all body measurements were consistently positive and high, ranging from 0.64 to 1.00. Although other measures showed higher genetic correlations with weight, thorax per... Mostrar Tudo |
Thesagro: |
Bovino; Cerrado; Gado; Genética. |
Categoria do assunto: |
-- |
Marc: |
LEADER 02331naa a2200229 a 4500 001 1566513 005 2003-03-18 008 2002 bl --- 0-- u #d 100 1 $aMAGNABOSCO, C. D. U. 245 $aEstimates of environmental effects and genetic parameters for body measurements and weight in Brahaman cattle raised in Mexico. 260 $c2002 520 $aA Derivative Free Restricted Maximum Likelihood (DFREML) algorithm was used with single trait and two animal models to estimate the variance and covariance components and thus, heritabilities and phenotypic, genetic and environmental correlations among nine different body measurements and weights of Brahman cattle raised in Mexico. The following measurements were considered: hip width, pin width, hip-pin width, anterior height, posterior height, body lenght, thorax perimeter, scrotal, circumference and weight. The analysis was based on a total of 1018 animals, born between 1992 and 1995, from 17 herds in the Mexico States of Chiapas, San Luis Potosi, Tabasco, Tamaulipas and Veracruz. The model included the following fixed effects: herd, year-season of birth, sex, age of the animal and feed management. The only random effect was the direct additive genetic contribuition of each animal. All fixed effects in the model were significant for all traits (p<0.05). Estimated heritabilities for the traits were: hip width 0.57, pin width 0.32, hip-pin width 0.41, anterior height 0.56, posterior height 0.54, body lenght 0.32, thorax perimeter 0.49, scrotal circumference 0.02 and weigth 0.66. The magnitude of the heritabilities was medium to high, with the exception of scrotal circumference. The genetic correlations among all body measurements were consistently positive and high, ranging from 0.64 to 1.00. Although other measures showed higher genetic correlations with weight, thorax perimeter combines a high value (0.70) with ease and repeatability, making it a useful field measurement to estimate body weight when scales are not available. 650 $aBovino 650 $aCerrado 650 $aGado 650 $aGenética 700 1 $aOJALA, M. 700 1 $aLOS REYES, A. de 700 1 $aSAINZ, R. D. 700 1 $aFERNANDES, A. 700 1 $aFAMULA, T. R. 773 $tJournal of Animal Breeding and Genetics, Berlin$gv. 119, p. 221-228, 2002.
Download
Esconder MarcMostrar Marc Completo |
Registro original: |
Embrapa Cerrados (CPAC) |
|
Biblioteca |
ID |
Origem |
Tipo/Formato |
Classificação |
Cutter |
Registro |
Volume |
Status |
URL |
Voltar
|
|
| Acesso ao texto completo restrito à biblioteca da Embrapa Soja. Para informações adicionais entre em contato com valeria.cardoso@embrapa.br. |
Registro Completo
Biblioteca(s): |
Embrapa Soja. |
Data corrente: |
04/07/2003 |
Data da última atualização: |
26/02/2007 |
Autoria: |
CARRÃO-PANIZZI, M. C. |
Título: |
Avaliação de cultivares de soja e produtos derivados para alimentação humana e animal. |
Ano de publicação: |
1998 |
Fonte/Imprenta: |
In: EMBRAPA. Centro Nacional de Pesquisa de Soja (Londrina, PR). Resultados de pesquisa da Embrapa Soja 1997. Londrina, 1998. |
Páginas: |
p. 235. |
Série: |
(EMBRAPA-CNPSo. Documentos, 118). |
Idioma: |
Português |
Categoria do assunto: |
-- |
Marc: |
LEADER 00505naa a2200133 a 4500 001 1464026 005 2007-02-26 008 1998 bl uuuu u00u1 u #d 100 1 $aCARRÃO-PANIZZI, M. C. 245 $aAvaliação de cultivares de soja e produtos derivados para alimentação humana e animal. 260 $c1998 300 $ap. 235. 490 $a(EMBRAPA-CNPSo. Documentos, 118). 773 $tIn: EMBRAPA. Centro Nacional de Pesquisa de Soja (Londrina, PR). Resultados de pesquisa da Embrapa Soja 1997. Londrina, 1998.
Download
Esconder MarcMostrar Marc Completo |
Registro original: |
Embrapa Soja (CNPSO) |
|
Biblioteca |
ID |
Origem |
Tipo/Formato |
Classificação |
Cutter |
Registro |
Volume |
Status |
Fechar
|
Nenhum registro encontrado para a expressão de busca informada. |
|
|