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Registro Completo |
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Biblioteca(s): |
Embrapa Caprinos e Ovinos. |
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Data corrente: |
13/08/2015 |
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Data da última atualização: |
09/07/2024 |
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Autoria: |
SERRADILLA, J. M. |
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Afiliação: |
Juan M. Serradilla, Department of Animal Production, University of Cordoba - Cordoba, Spain. |
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Título: |
Use of high yielding goat breeds for milk production. |
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Ano de publicação: |
2001 |
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Fonte/Imprenta: |
Livestock Production Science, v. 71, p. 59-73, 2001. |
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Idioma: |
Inglês |
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Conteúdo: |
Abstract: Reported experiments on the raising of high yielding breeds of goats under suboptimal conditions in different areas of the world, have been reviewed. Exotic breeds are introduced in these areas either to substitute the less productive local breeds or to be crossed with them to upgrade them. Comparing performances of exotic, local and crossbred goats is always difficult due to the strong differences of management and environmental conditions under which they are raised and to the frequent lack of description of these conditions. However, some general trends can be drawn. (1) Exotic breeds have better milk yields than local breeds, but lower performances than in their region of origin. (2) Protein, fat and solid contents of milk from exotic breeds are similar to those in their regions of origin and lower to those of local breeds. (3) Milk yields of first crossed products (F1) are intermediate between those of the exotic and the local breeds. Heterosis for milk yield has seldom been reported. (4) Protein, fat and solid contents of milk from F1 does are either similar to those of local breeds or intermediate between local and exotic breeds. (5) Performances of does issued by crossing F1 products are lower than F1 and backcrosses. ? 2001 Elsevier Science B.V. All rights reserved. |
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Palavras-Chave: |
Crossbreeding; Exotic breeds; Introduced breeds; Raças introduzidas. |
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Thesagro: |
Caprino; Produção leiteira; Raça. |
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Thesaurus Nal: |
Crossbreds; Goats; Milk production. |
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Categoria do assunto: |
L Ciência Animal e Produtos de Origem Animal |
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Marc: |
LEADER 01931naa a2200241 a 4500
001 2021924
005 2024-07-09
008 2001 bl uuuu u00u1 u #d
100 1 $aSERRADILLA, J. M.
245 $aUse of high yielding goat breeds for milk production.
260 $c2001
520 $aAbstract: Reported experiments on the raising of high yielding breeds of goats under suboptimal conditions in different areas of the world, have been reviewed. Exotic breeds are introduced in these areas either to substitute the less productive local breeds or to be crossed with them to upgrade them. Comparing performances of exotic, local and crossbred goats is always difficult due to the strong differences of management and environmental conditions under which they are raised and to the frequent lack of description of these conditions. However, some general trends can be drawn. (1) Exotic breeds have better milk yields than local breeds, but lower performances than in their region of origin. (2) Protein, fat and solid contents of milk from exotic breeds are similar to those in their regions of origin and lower to those of local breeds. (3) Milk yields of first crossed products (F1) are intermediate between those of the exotic and the local breeds. Heterosis for milk yield has seldom been reported. (4) Protein, fat and solid contents of milk from F1 does are either similar to those of local breeds or intermediate between local and exotic breeds. (5) Performances of does issued by crossing F1 products are lower than F1 and backcrosses. ? 2001 Elsevier Science B.V. All rights reserved.
650 $aCrossbreds
650 $aGoats
650 $aMilk production
650 $aCaprino
650 $aProdução leiteira
650 $aRaça
653 $aCrossbreeding
653 $aExotic breeds
653 $aIntroduced breeds
653 $aRaças introduzidas
773 $tLivestock Production Science$gv. 71, p. 59-73, 2001.
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Registro original: |
Embrapa Caprinos e Ovinos (CNPC) |
