Data/hora: 23/06/2024 21:11:30

Biblioteca(s): | Embrapa Caprinos e Ovinos; Embrapa Recursos Genéticos e Biotecnologia.
Data corrente: | 15/12/2009
Data da última atualização: | 18/05/2015
Autoria: | LÔBO, A. M. B. O.; LOBO, R. N. B.; PAIVA, S. R.; OLIVEIRA, S. M. P. de; FACO, O.
Afiliação: | Ana Maria Bezerra Oliveira Lôbo, Universidade Federal do Ceará (UFC); RAIMUNDO NONATO BRAGA LOBO, CNPC; SAMUEL REZENDE PAIVA, CENARGEN; Sônia Maria Pinheiro de Oliveira, Universidade Federal do Ceará (UFC); OLIVARDO FACO, CNPC.
Título: | Genetic parameters for growth, reproductive and maternal traits in a multibreed meat sheep population.
Ano de publicação: | 2009
Fonte/Imprenta: | Genetics and Molecular Biology, v. 32, n. 4, p. 761-770, 2009.

Idioma:

Inglês
Português

Conteúdo: | The genetic parameters for growth, reproductive and maternal traits in a multibreed meat sheep population were estimated by applying the Average Information Restricted Maximum Likelihood method to an animal model. Data from a flock supported by the Programa de Melhoramento Genético de Caprinos e Ovinos de Corte (GENECOC) were used. The traits studied included birth weight (BW), weaning weight (WW), slaughter weight (SW), yearling weight (YW), weight gain from birth to weaning (GBW), weight gain from weaning to slaughter (GWS), weight gain from weaning to yearling (GWY), age at first lambing (AFL), lambing interval (LI), gestation length (GL), lambing date (LD - number of days between the start of breeding season and lambing), litter weight at birth (LWB) and litter weight at weaning (LWW). The direct heritabilities were 0.35, 0.81, 0.65, 0.49, 0.20, 0.15 and 0.39 for BW, WW, SW, YW, GBW, GWS and GWY, respectively, and 0.04, 0.06, 0.10, 0.05, 0.15 and 0.11 for AFL, LI, GL, LD, LWB and LWW, respectively. Positive genetic correlations were observed among body weights. In contrast, there was a negative genetic correlation between GBW and GWS (-0.49) and GBW and GWY (-0.56). Positive genetic correlations were observed between AFL and LI, LI and GL, and LWB and LWW. These results indicate a strong maternal influence in this herd and the presence of sufficient genetic variation to allow mass selection for growth traits. Additive effects were of little importance for reproductive traits, and other strategies are necessary to improve the performance of these animals.
Palavras-Chave: | Cross-breeding; Herdabilidade; Peso de leitegada.
Thesagro: | Genética Animal; Ovino; Peso ao Nascer; Variação Genética.
Thesaurus Nal: | Age; Body weight; Crossbreds; Genetic correlation; Genetic variation; Heritability; Litter weight; Parturition interval; Sheep meat.

Categoria do assunto:

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G Melhoramento Genético

Registro original: | Embrapa Recursos Genéticos e Biotecnologia (CENARGEN)

Exemplares:

CNPC - (22531-1) - UPC - AP - DD - SP 05388 -  - SP 05388 - DIS
CENARGEN - (32204-1) - UPC - AP - PP - 575.105 -  - 575.105 - DIS