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Production traits in F1 and F2 crosses with naturalized hair breed Santa Inês ewes

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Production traits in F1 and F2 crosses with naturalized hair breed Santa Inês ewes

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Título Production traits in F1 and F2 crosses with naturalized hair breed Santa Inês ewes
Autor Silva, Alessandra Ferreira da
Pimentel, Concepta Margaret McManus
Paim, Tiago do Prado
Dallago, Bruno Stéfano Lima
Esteves, Geisa Isilda Ferreira
Louvandini, Helder
Braccini Neto, José
Lucci, Carolina Madeira
Abstract The once bred ewe slaughter method proposes the use of female lamb to produce a lamb and then both are slaughtered, increasing income and high quality meat production. Thus, this study evaluated the growth and reproduction performance of ewe lamb from Santa Inês (SI), a naturalized genetic resource, and their crosses (Dorper x Santa Inês (DOR), Texel x Santa Inês (TEX), Ile de France x Santa Inês (ILE)), as well as the survivability and development of their offspring. The animals were weighed monthly from birth to 12-months age. Samples of milk were collected on approximately 30 days of lactation. The physical-chemical analysis of milk was performed. SI females (2.94 kg) had significantly lower birth weight than DOR (3.80 kg) and TEX (3.87 kg). ILE females had higher weaning weight and weight at 12 months than SI females, which reflected in higher daily weight gain (ADG) (108.46 g/day) than TEX and SI. The pregnancy rates at 12 months were ILE (57.14%), TEX (25%), DOR (50%), and SI (28.57%), with TEX and SI differing of ILE and DOR (p = 0.03). Therefore, in semi-confinement and in a once-bred ewe production system using crossbreeding and allying meat production and reproduction, we recommend the use of Dorper and Ile de France breeds for crossbreeding with Santa Inês females. These results demonstrated the useful of a local genetic resource in productive system aiming a low cost meat production.
Contido em SpringerPlus. Heidelberg. Vol. 3, 66 (2014), 6 p.
Assunto Fertilidade animal
Genetica animal
Leite
Ovino
Produção animal
[en] Females
[en] Fertility
[en] Genetic resource
[en] Milk
[en] Performance
[en] Sheep production
Origem Estrangeiro
Tipo Artigo de periódico
URI http://hdl.handle.net/10183/142282
Arquivos Descrição Formato
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