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| 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: |
12/01/2012 |
Data da última atualização: |
22/01/2016 |
Tipo da produção científica: |
Artigo em Periódico Indexado |
Circulação/Nível: |
B - 1 |
Autoria: |
LOBO, R. N. B.; FERNANDES JÚNIOR, G. A.; LOBO, A. M. B. O. |
Afiliação: |
RAIMUNDO NONATO BRAGA LOBO, CNPC; Gerardo Alves Fernandes Júnior, UNESP, Jaboticabal, SP.; ANA MARIA BEZERRA OLIVEIRA LOBO, CNPC. |
Título: |
Genetic (co)variance components for ratio of lamb weight to ewe metabolic weight as an indicator of ewe efficiency. |
Ano de publicação: |
2012 |
Fonte/Imprenta: |
Livestock Science, Amsterdam, v. 143, p. 214-219, 2012. |
Idioma: |
Inglês |
Conteúdo: |
Data from a multibreed commercial flock located at Mid-West of Brazil, supported by Programa de Melhoramento Genético de Caprinos e Ovinos de Corte (GENECOC),were used to estimate genetic parameters of traits related to ewe productivity by Average Information Restricted Maximum Likelihood method applied to an animal model. The analyzed traits were litter weight at birth (LWB) and atweaning (LWW), eweweight atweaning (EW)and ewe production efficiency, estimated by WEE=LWW/EW0.75. The heritabilities were 0.26±0.05, 0.32±0.06, 0.37±0.03 and 0.10±0.02 for LWB, LWW, EWand WEE, respectively. Significant effects for direct heterosis were observed for LWWand EW. Recombination losseswere important for EWandWEE. Genetic correlations of LWBwith LWW, EWandWEEwere 0.68, 0.37 and 0.15, respectively; of LWWwith EW and WEE were 0.30 and 0.34, respectively; and between EW and WEE was ?0.25. Even though it is a low heritability trait, WEE can be indicated as a selection criteria for improving the ewe productivity without increasing the mature weight of animals due to its genetic correlations with LWWand other traits. |
Palavras-Chave: |
Animal model; Brasil; Correlação genética; Herdabilidade; Modelo animal; Multibreed flock; Non-additive effects. |
Thesagro: |
Cordeiro; Melhoramento genético animal; Ovino; Peso ao nascer. |
Thesaurus NAL: |
Birth weight; Genetic correlation; Heritability; Sheep. |
Categoria do assunto: |
-- |
Marc: |
LEADER 02052naa a2200325 a 4500 001 1912522 005 2016-01-22 008 2012 bl uuuu u00u1 u #d 100 1 $aLOBO, R. N. B. 245 $aGenetic (co)variance components for ratio of lamb weight to ewe metabolic weight as an indicator of ewe efficiency. 260 $c2012 520 $aData from a multibreed commercial flock located at Mid-West of Brazil, supported by Programa de Melhoramento Genético de Caprinos e Ovinos de Corte (GENECOC),were used to estimate genetic parameters of traits related to ewe productivity by Average Information Restricted Maximum Likelihood method applied to an animal model. The analyzed traits were litter weight at birth (LWB) and atweaning (LWW), eweweight atweaning (EW)and ewe production efficiency, estimated by WEE=LWW/EW0.75. The heritabilities were 0.26±0.05, 0.32±0.06, 0.37±0.03 and 0.10±0.02 for LWB, LWW, EWand WEE, respectively. Significant effects for direct heterosis were observed for LWWand EW. Recombination losseswere important for EWandWEE. Genetic correlations of LWBwith LWW, EWandWEEwere 0.68, 0.37 and 0.15, respectively; of LWWwith EW and WEE were 0.30 and 0.34, respectively; and between EW and WEE was ?0.25. Even though it is a low heritability trait, WEE can be indicated as a selection criteria for improving the ewe productivity without increasing the mature weight of animals due to its genetic correlations with LWWand other traits. 650 $aBirth weight 650 $aGenetic correlation 650 $aHeritability 650 $aSheep 650 $aCordeiro 650 $aMelhoramento genético animal 650 $aOvino 650 $aPeso ao nascer 653 $aAnimal model 653 $aBrasil 653 $aCorrelação genética 653 $aHerdabilidade 653 $aModelo animal 653 $aMultibreed flock 653 $aNon-additive effects 700 1 $aFERNANDES JÚNIOR, G. A. 700 1 $aLOBO, A. M. B. O. 773 $tLivestock Science, Amsterdam$gv. 143, p. 214-219, 2012.
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