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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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Embrapa Caprinos e Ovinos (CNPC) |
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| 4. |  | ROSSATO, M.; BARBIERI, R. L. Estudo etnobotânico de palmeiras do Rio Grande do Sul. CONGRESSO BRASILEIRO DE AGROECOLOGIA, 2.; SEMINÁRIO INTERNACIONAL SOBRE AGROECOLOGIA, 5.; SEMINÁRIO ESTADUAL SOBRE AGROECOLOGIA, 6., 2004, Porto Alegre. Agrobiodiversidade: base para sociedades sustentáveis: anais... Porto Alegre: EMATER - RS, 2004. 1 CD-ROM| Tipo: Artigo em Anais de Congresso / Nota Técnica | Circulação/Nível: Nacional - C |
| Biblioteca(s): Embrapa Clima Temperado. |
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| 6. | | LOPES, C. A.; ROSSATO, M.; SILVA, B. B. da. Avaliação de genótipos de tomateiro para resistência à murcha bacteriana. In: CONGRESSO BRASILEIRO DE TOMATE INDUSTRIAL, 3.; SEMINÁRIO NACIONAL DE TOMATE DE MESA, 1., 2009, Goiânia. Tendências mundiais do processamento de tomate: anais... Brasília, DF: Embrapa Hortaliças: Associação Brasileira de Horticultura; Goiânia; FAEG: UFG: Secretaria de Agricultura, Pecuária e Abastecimento: Win Central de Eventos, 2009. CD-ROM| Tipo: Resumo em Anais de Congresso |
| Biblioteca(s): Embrapa Hortaliças. |
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| 10. | | ROSSATO, M.; CABRAL, C. S.; MACIEL, M.; LOPES, C. A. Dama-da-noite (Cestrum nocturnum), nova hospedeira de Ralstonia solanacearum. Tropical Plant Pathology, Brasília, DF, v. 37, 2012. 1 CD-ROM. Suplemento. Edição do 45º Congresso Brasileiro de Fitopatologia, 2012, Manaus. Resumo 758.| Tipo: Resumo em Anais de Congresso |
| Biblioteca(s): Embrapa Hortaliças. |
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| 11. | | LOPES, C. A.; MENDONCA, J. L. de; ROSSATO, M. Eficácia da enxertia no controle da murcha bacteriana do tomateiro. In: CONGRESSO BRASILEIRO DE TOMATE INDUSTRIAL, 3.; SEMINÁRIO NACIONAL DE TOMATE DE MESA, 1., 2009, Goiânia. Tendências mundiais do processamento de tomate: anais... Brasília, DF: Embrapa Hortaliças: Associação Brasileira de Horticultura; Goiânia; FAEG: UFG: Secretaria de Agricultura, Pecuária e Abastecimento: Win Central de Eventos, 2009. CD-ROM.| Tipo: Resumo em Anais de Congresso |
| Biblioteca(s): Embrapa Hortaliças. |
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| 13. | | ROSSATO, M. BARBIERI, R. L.; SCHÄFER, A.; , ZACARIA, J. Caracterização molecular de populações de palmeiras do gênero butia do Rio Grande do Sul através de marcadores ISSR Magistra, Cruz das Almas, v. 19, n.4, p. 311-318, out./dez. 2007.| Tipo: Artigo em Periódico Indexado | Circulação/Nível: Nacional - B |
| Biblioteca(s): Embrapa Clima Temperado. |
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| 16. | | ROSSATO, M.; SOUZA, A. N.; LOPES, C. A. Response of geranium inoculated with different isolates of Ralstonia solanacearum. Tropical Plant Pathology, Brasília, DF, v. 36, p. 144, 2011. 1 CD-ROM. Suplemento. Edição dos resumos do 44º Congresso Brasileiro de Fitopatologia, 2011, Bento Gonçalves. Resumo 1483| Tipo: Resumo em Anais de Congresso |
| Biblioteca(s): Embrapa Hortaliças. |
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| Registros recuperados : 63 | |
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