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 | Acesso ao texto completo restrito à biblioteca da Embrapa Pecuária Sul. Para informações adicionais entre em contato com cppsul.biblioteca@embrapa.br. |
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Registro Completo |
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Biblioteca(s): |
Embrapa Caprinos e Ovinos; Embrapa Pecuária Sul. |
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Data corrente: |
25/11/2002 |
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Data da última atualização: |
25/11/2002 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
BENAVIDES, M. V.; MAHER, A. P. |
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Título: |
Quantitative genetic studies on wool yellowing in Corriedale sheep. II. Clean wool colour and wool production traits: genetic parameter estimates and economic returns. |
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Ano de publicação: |
2000 |
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Fonte/Imprenta: |
Australian Journal of Agricultural Research, v. 51, n. 2, p. 191-196, 2000. |
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Idioma: |
Inglês |
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Conteúdo: |
The potential for improvement of clean wool colour (CWC) in Corriedale sheep via selection was examined. The heritability, and phenotypic and genetic correlations, of CWC, brightness (Y), greasy (GFW) and clean (CFW) fleece weights , yield percentage (Yield), mean fibre diameter (MFD), and visual colour score were estimated from 440 progeny of 19 sires of a Corriedale flock using restricted maximum likelihood (REML) procedures with average information algorithm (AIREML).
The heritability of CWC was estimated at 0.27+-0.13. Clean wool colour showed strong positive genetic correlations with CFW and MFD. Visual colour score and CWC were also positively genetically correlated. As expected, direct selection criteria against MFD, CWC, or visual colour score would reduce CWC; however, direct selection M against MFD would improve clean wool colour with negligible reductions on CFW, thus resulting in small economic gains.
Several selection indices were calculated having either CFW, MFD, and CWC or CFW and MFD as selection criteria. The b-values of an unrestricted index were estimated at I1 =+ 1.15 CFW + 0.13 MFD + 0.43.CWC, with positive correlated responses for all 3 breeding objective traits (CFW, MFD, and CWC). A second index, where CFW was restricted to nil genetic change, was estimated at: I2 = + 0.14 CFW - 0.02 MFD + 0.01 CWC. This index was expected to cause a negligible genetic gain for CWC (-0.04 Y-Z units/head.year). To avoid economic losses with the reduction on CFW, a third selection index was calculated where CWC was restricted to nil change. The index was estimated at I3 = +0.61 CFW - 0.07 MFD + 0.02 CWC with expected increases in CFW and decreases in MFD. Selection indices with (a) CFW and MFD (4) and (b) CFW, MFD, and visual colour score (15) as selection criteria would increase CFW, MFD, and CWC at the same rates observed in I1. MenosThe potential for improvement of clean wool colour (CWC) in Corriedale sheep via selection was examined. The heritability, and phenotypic and genetic correlations, of CWC, brightness (Y), greasy (GFW) and clean (CFW) fleece weights , yield percentage (Yield), mean fibre diameter (MFD), and visual colour score were estimated from 440 progeny of 19 sires of a Corriedale flock using restricted maximum likelihood (REML) procedures with average information algorithm (AIREML).
The heritability of CWC was estimated at 0.27+-0.13. Clean wool colour showed strong positive genetic correlations with CFW and MFD. Visual colour score and CWC were also positively genetically correlated. As expected, direct selection criteria against MFD, CWC, or visual colour score would reduce CWC; however, direct selection M against MFD would improve clean wool colour with negligible reductions on CFW, thus resulting in small economic gains.
Several selection indices were calculated having either CFW, MFD, and CWC or CFW and MFD as selection criteria. The b-values of an unrestricted index were estimated at I1 =+ 1.15 CFW + 0.13 MFD + 0.43.CWC, with positive correlated responses for all 3 breeding objective traits (CFW, MFD, and CWC). A second index, where CFW was restricted to nil genetic change, was estimated at: I2 = + 0.14 CFW - 0.02 MFD + 0.01 CWC. This index was expected to cause a negligible genetic gain for CWC (-0.04 Y-Z units/head.year). To avoid economic losses with the reduction on CFW, a thi... Mostrar Tudo |
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Palavras-Chave: |
Melhoramento genético; Raça Corriedale; Viabilidade econômica. |
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Thesagro: |
Lã; Ovino; Parâmetro Genético. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 02579naa a2200205 a 4500
001 1528897
005 2002-11-25
008 2000 bl uuuu u00u1 u #d
100 1 $aBENAVIDES, M. V.
245 $aQuantitative genetic studies on wool yellowing in Corriedale sheep. II. Clean wool colour and wool production traits$bgenetic parameter estimates and economic returns.$h[electronic resource]
260 $c2000
520 $aThe potential for improvement of clean wool colour (CWC) in Corriedale sheep via selection was examined. The heritability, and phenotypic and genetic correlations, of CWC, brightness (Y), greasy (GFW) and clean (CFW) fleece weights , yield percentage (Yield), mean fibre diameter (MFD), and visual colour score were estimated from 440 progeny of 19 sires of a Corriedale flock using restricted maximum likelihood (REML) procedures with average information algorithm (AIREML). The heritability of CWC was estimated at 0.27+-0.13. Clean wool colour showed strong positive genetic correlations with CFW and MFD. Visual colour score and CWC were also positively genetically correlated. As expected, direct selection criteria against MFD, CWC, or visual colour score would reduce CWC; however, direct selection M against MFD would improve clean wool colour with negligible reductions on CFW, thus resulting in small economic gains. Several selection indices were calculated having either CFW, MFD, and CWC or CFW and MFD as selection criteria. The b-values of an unrestricted index were estimated at I1 =+ 1.15 CFW + 0.13 MFD + 0.43.CWC, with positive correlated responses for all 3 breeding objective traits (CFW, MFD, and CWC). A second index, where CFW was restricted to nil genetic change, was estimated at: I2 = + 0.14 CFW - 0.02 MFD + 0.01 CWC. This index was expected to cause a negligible genetic gain for CWC (-0.04 Y-Z units/head.year). To avoid economic losses with the reduction on CFW, a third selection index was calculated where CWC was restricted to nil change. The index was estimated at I3 = +0.61 CFW - 0.07 MFD + 0.02 CWC with expected increases in CFW and decreases in MFD. Selection indices with (a) CFW and MFD (4) and (b) CFW, MFD, and visual colour score (15) as selection criteria would increase CFW, MFD, and CWC at the same rates observed in I1.
650 $aLã
650 $aOvino
650 $aParâmetro Genético
653 $aMelhoramento genético
653 $aRaça Corriedale
653 $aViabilidade econômica
700 1 $aMAHER, A. P.
773 $tAustralian Journal of Agricultural Research$gv. 51, n. 2, p. 191-196, 2000.
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Registro original: |
Embrapa Caprinos e Ovinos (CNPC) |
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| Registros recuperados : 10 | |
| 1. |  | SORIANO, B. M. A.; RISSO, A.; PELLEGRIN, L. A. Erosividade da chuva na bacia hidrográfica do Rio São Lourenço, MT. In: SEMINÁRIO DA REDE AGROHIDRO, 3., WORKSHOP DO PROJETO OS IMPACTOS DA AGRICULTURA E DAS MUDANÇAS CLIMÁTICAS NOS RECURSOS HÍDRICOS, 1., 2015, Corumbá, MS. Água na agricultura : desafios frente às mudanças climáticas e de uso da terra: resumos. Brasília, DF: Embrapa, 2015. p. 39| Tipo: Resumo em Anais de Congresso |
| Biblioteca(s): Embrapa Pantanal. |
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| 3. | | GALDINO, S.; RISSO, A.; SORIANO, B. M. A.; VIEIRA, L. M.; POTT, A.; PADOVANI, C. R.; MELO, E. C.; ALMEIDA JUNIOR, N. de. Hydrological laminar erosion in 1994 at the upper Taquari River basin - Brazil. In: INTERNATIONAL CONFERENCE ON LAND DEGRADATION AND MEETING OF THE IUSS SUBCOMMISION C - SOIL AND WATER CONSERVATION, 3., 2001, Rio de Janeiro. Land degradation: new trends towards global sustainability - conference guide ... Rio de Janeiro: Embrapa Solos, 2001. p.78.| Biblioteca(s): Embrapa Pantanal. |
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| 4. | | GALDINO, S.; RISSO, A.; SORIANO, B. M. A.; VIEIRA, L. M.; PADOVANI, C. R.; POTT, A.; MELO, E. C.; ALMEIDA JÚNIOR, N. de. Perdas de solo na Bacia do Alto Taquari. Corumbá: Embrapa Pantanal, 2003. 40 p. (Embrapa Pantanal. Boletim de Pesquisa e Desenvolvimento, 44).| Tipo: Boletim de Pesquisa e Desenvolvimento |
| Biblioteca(s): Embrapa Pantanal. |
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| 5. | | GALDINO, S.; RISSO, A.; SORIANO, B. M. A.; VIEIRA, L. M.; POTT, A.; PADOVANI, C. R.; MELO, E. C.; ALMEIDA JUNIOR, N. de. Perdas de solo na bacia hidrografica do Alto Taquari em 1994. In: SIMPOSIO SOBRE RECURSOS NATURAIS E SOCIO-ECONOMICOS DO PANTANAL, 3., 2000, Corumba. Os desafios do novo milenio - resumos. Corumba: Embrapa Pantanal, 2000. p.67-68.| Biblioteca(s): Embrapa Gado de Corte; Embrapa Pantanal. |
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| 6. | | SORIANO, B. M. A.; SOARES, M. T. S.; FERNANDES, A. H. B. M.; FERNANDES, F. A.; RISSO, A.; PELLEGRIN, L. A. O Pantanal e suas características abióticas. In: SANTOS, S. A.; SALIS, S. M. de; COMASTRI FILHO, J. A. (Ed.). Cavalo pantaneiro: rústico por natureza. Brasília, DF: Embrapa, 2016. p. 19-35.| Tipo: Capítulo em Livro Técnico-Científico |
| Biblioteca(s): Embrapa Pantanal. |
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| 7. | | CALHEIROS, D. F.; ROCHE, K. F.; MASSRUHÁ, S. M. F. S.; DIAS, F. A.; ONTANHOLI, M. C.; BARBOSA, D. S.; DORES, E. F. G. C.; COLLISCHONN, W.; PAZ, A. R.; RISSO, A.; SORIANO, B. M. A.; SILVA, E. L. V. River basin quality index - tool to improve management of water resources in Miranda river basin, south Pantanal - Brazil. In: INTECOL INTERNATIONAL WETLANDS CONFERENCE, 8., Cuiabá, 2008. Big wetlands, big concerns: abstracts. [Sl.: s.n], 2008. p.42| Tipo: Resumo em Anais de Congresso |
| Biblioteca(s): Embrapa Pantanal. |
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| 8. | | CALHEIROS, D. F.; ROCHE, K. F.; MASSRUHÁ, S. M. F. S.; DIAS, F. A; SOUZA, G. F. de; MONTANHOLI, M. C.; BARBOSA, D. S.; FERREIRA, L. M.; DORES, E. F. G. de C.; SILVA, E. de C. e; OLIVEIRA, L. J.; PINTO, A. L.; SOUZA, C. F; COLLISCHONN, W.; PAZ, A. R. da; RISSO, A.; SORIANO, B. M. A.; SILVA, E. L. V. da. River basin quality index - tool to improve management of water resources in Miranda river basin, south Pantanal - Brazil. In: INTERNATIONAL WETLANDS CONFERENCE, 8., Cuiabá, 2008. Big wetlands, big concerns: abstracts. [S.l.: s.n.], 2008. p. 42. INTECOL 2008.| Tipo: Resumo em Anais de Congresso |
| Biblioteca(s): Embrapa Agricultura Digital. |
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| 9. | | CALHEIROS, D. F.; ROCHE, K. F.; MASSRUHA, S. M. F. S.; DIAS, F. A.; SOUZA, G. F. de; MONTANHOLI, M. C.; BARBOSA, D. S.; FERREIRA, L. M.; DORES, E. F. G. C.; SILVA, E. de C. e.; SOUZA, C. F.; COLLISCHONN, W.; PAZ, A. E. da; RISSO, A.; SORIANO, B. M. A. Índice de qualidade de bacia - ferramenta de gestão de recursos naturais em nível de bacia hidrográfica. In: WORKSHOP INTERDISCIPLINAR DE PESQUISA EM INDICADORES DE SUSTENTABILIDADE, 3., São Carlos. Anais... São Carlos: USP, 2011. Não paginado.| Tipo: Resumo em Anais de Congresso |
| Biblioteca(s): Embrapa Pantanal. |
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| 10. | | CALHEIROS, D. F.; ROCHE, K. F.; MASSRUHÁ, S. M. F. S.; DIAS, F. A.; SOUZA, G. F.; MONTANHOLI, M. C.; BARBOSA, D. S.; FERREIRA, L. M.; DORES, E. F. G. C.; SILVA, E. C.; SOUZA, C. F.; COLLISCHONN, W.; PAZ, A. R.; RISSO, A.; SORIANO, B. M. A. Índice de qualidade de bacia - ferramenta de gestão de recursos naturais em nível de bacia hidrográfica. In: WORKSHOP INTERDISCIPLINAR DE PESQUISA EM INDICADORES DE SUSTENTABILIDADE, 3., 2011, São Paulo. Anais de Resumos. São Carlos: USP, 2012. Não paginado. WIPIS 2011.| Tipo: Resumo em Anais de Congresso |
| Biblioteca(s): Embrapa Agricultura Digital. |
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| Registros recuperados : 10 | |
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