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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 stimates 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 02578naa 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 stimates 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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Registro Completo
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Biblioteca(s): |
Embrapa Amazônia Oriental. |
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Data corrente: |
23/10/2019 |
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Data da última atualização: |
18/12/2023 |
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Tipo da produção científica: |
Artigo em Anais de Congresso |
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Autoria: |
JOSÉ, A. R. M.; FREIRE FILHO, F. R.; CORDOVIL, G. D'A.; GOMES JUNIOR, R. A. |
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Afiliação: |
Andreza Rafaely Martins José, GRADUANDA UFRA; FRANCISCO RODRIGUES FREIRE FILHO, CPATU; Gabriela D’Assunção Cordovil, GRADUANDA UFRA; RUI ALBERTO GOMES JUNIOR, CPATU. |
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Título: |
Avaliação da resistência de progênies F5:6 de feijão-de-metro ao CPSMV (Caupea severe mosaic virus). |
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Ano de publicação: |
2019 |
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Fonte/Imprenta: |
In: SEMINÁRIO DE INICIAÇÃO CIENTÍFICA DA EMBRAPA AMAZÔNIA ORIENTAL, 23., 2019, Belém, PA. Anais. Belém, PA: Embrapa Amazônia Oriental, 2019. |
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Páginas: |
p. 201-205. |
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Idioma: |
Português |
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Conteúdo: |
O feijão-de-metro é uma hortaliça que possui importante papel na complementação da renda e diversificação de cultivos, principalmente na produção familiar. O vírus Cowpea Severe Mosaic Virus (CPSMV) ocorre com frequência nas regiões produtoras paraenses, causando danos severos aos cultivos. No estudo atual, foram avaliadas em relação à susceptibilidade ao CPSMV, 100 novas linhas de feijão-de-metro, obtidas a partir de cruzamentos de feijão-de-metro suscetível, com uma linhagem resistente do tipo tradicional. Foi percebida grande variação na susceptibilidade destas linhagens ao CPSMV, com a identificação de 25 linhagens resistentes. |
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Thesagro: |
Doença; Feijão; Melhoramento Genético Vegetal; Vigna Unguiculata. |
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Categoria do assunto: |
-- |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/203568/1/PIBIC-2019-202-206.pdf
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Marc: |
LEADER 01405nam a2200205 a 4500
001 2113418
005 2023-12-18
008 2019 bl uuuu u00u1 u #d
100 1 $aJOSÉ, A. R. M.
245 $aAvaliação da resistência de progênies F5$b6 de feijão-de-metro ao CPSMV (Caupea severe mosaic virus).$h[electronic resource]
260 $aIn: SEMINÁRIO DE INICIAÇÃO CIENTÍFICA DA EMBRAPA AMAZÔNIA ORIENTAL, 23., 2019, Belém, PA. Anais. Belém, PA: Embrapa Amazônia Oriental$c2019
300 $ap. 201-205.
520 $aO feijão-de-metro é uma hortaliça que possui importante papel na complementação da renda e diversificação de cultivos, principalmente na produção familiar. O vírus Cowpea Severe Mosaic Virus (CPSMV) ocorre com frequência nas regiões produtoras paraenses, causando danos severos aos cultivos. No estudo atual, foram avaliadas em relação à susceptibilidade ao CPSMV, 100 novas linhas de feijão-de-metro, obtidas a partir de cruzamentos de feijão-de-metro suscetível, com uma linhagem resistente do tipo tradicional. Foi percebida grande variação na susceptibilidade destas linhagens ao CPSMV, com a identificação de 25 linhagens resistentes.
650 $aDoença
650 $aFeijão
650 $aMelhoramento Genético Vegetal
650 $aVigna Unguiculata
700 1 $aFREIRE FILHO, F. R.
700 1 $aCORDOVIL, G. D'A.
700 1 $aGOMES JUNIOR, R. A.
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Registro original: |
Embrapa Amazônia Oriental (CPATU) |
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