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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: |
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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.
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Embrapa Cerrados (CPAC) |
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Registro Completo
Biblioteca(s): |
Embrapa Cerrados. |
Data corrente: |
10/05/2004 |
Data da última atualização: |
28/10/2009 |
Autoria: |
FIGUEREDO, S. F.; AZEVEDO, J. A. de; ANDRADE, L. M. de; JUNQUEIRA, N. T. V.; ANDRADE, L. R. M. de; GOMES, A. C. |
Título: |
Influencia do regime hidrico e da adubacao nitrogenada na producao do maracuja-doce em solo de cerrado. |
Ano de publicação: |
2002 |
Fonte/Imprenta: |
Planaltina: Embrapa Cerrados, 2002. |
Páginas: |
4 p. |
Série: |
(Embrapa Cerrados. Comunicado Tecnico, 80). |
Idioma: |
Português |
Palavras-Chave: |
Productivity. |
Thesagro: |
Cerrado; Fertilizante Nitrogenado; Irrigação; Manejo de Água; Maracujá; Produtividade. |
Thesaurus NAL: |
irrigation; nitrogen fertilizers; Passiflora alata; passion fruits; water management. |
Categoria do assunto: |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/CPAC-2009/24551/1/comtec_80.pdf
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Marc: |
LEADER 00948nam a2200325 a 4500 001 1557022 005 2009-10-28 008 2002 bl uuuu u0uu1 u #d 100 1 $aFIGUEREDO, S. F. 245 $aInfluencia do regime hidrico e da adubacao nitrogenada na producao do maracuja-doce em solo de cerrado. 260 $aPlanaltina: Embrapa Cerrados$c2002 300 $a4 p. 490 $a(Embrapa Cerrados. Comunicado Tecnico, 80). 650 $airrigation 650 $anitrogen fertilizers 650 $aPassiflora alata 650 $apassion fruits 650 $awater management 650 $aCerrado 650 $aFertilizante Nitrogenado 650 $aIrrigação 650 $aManejo de Água 650 $aMaracujá 650 $aProdutividade 653 $aProductivity 700 1 $aAZEVEDO, J. A. de 700 1 $aANDRADE, L. M. de 700 1 $aJUNQUEIRA, N. T. V. 700 1 $aANDRADE, L. R. M. de 700 1 $aGOMES, A. C.
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