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 | Acesso ao texto completo restrito à biblioteca da Embrapa Caprinos e Ovinos. Para informações adicionais entre em contato com cnpc.biblioteca@embrapa.br. |
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Registro Completo |
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Biblioteca(s): |
Embrapa Caprinos e Ovinos. |
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Data corrente: |
01/08/1992 |
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Data da última atualização: |
17/06/2025 |
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Autoria: |
DICKERSON, G. E. |
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Título: |
Implications of genetic-environmental interaction in animal breeding. |
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Ano de publicação: |
1962 |
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Fonte/Imprenta: |
Animal Production, v. 4, n. 1, p. 47-63, 1962. |
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DOI: |
https://doi.org/10.1017/S0003356100034395 |
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Idioma: |
Inglês |
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Conteúdo: |
This report is an attempt to interpret evidence concerning geneticenvironmental interaction as it relates to the effectiveness of selection. Methods of estimating genetic-environmental interaction were investigated with the conclusion that the standard analysis of variance is a satisfactory tool provided (1) the interaction component of variance is adjusted for important variation between environments in the scale of genetic effects and (2) the variance component for the average effects of genetic groups is recognised as equivalent to the average covariance of the same genetic group in different environments (i.e. ) to include the real possibility of negative genetic correlation. It is shown that (1) response to selection for improved average performance over varying environments (ΔGt) is proportional to the genetic correlation between expressions of the same genotype in different environments (rG), that (2) gain in ΔGi, from measuring performance in k environments is proportional to if k times as many animals are tested, but to if total numbers per genotypic class (nk) are held constant, where g2 is heritability of individual variation within environments and rG is the correlation between the phenotypic expressions of the same genotype in different environments. Evidence is presented that (1) variations among poultry-farm environments in California cause important, but largely unpredictable, shifts in ranking of genetic stocks for egg production, and (2) improved accuracy in measuring genetic differences in average performance across environments probably justifies utilising a sample of 5 to 10 farms representing the range of environments for which the stock is bred. MenosThis report is an attempt to interpret evidence concerning geneticenvironmental interaction as it relates to the effectiveness of selection. Methods of estimating genetic-environmental interaction were investigated with the conclusion that the standard analysis of variance is a satisfactory tool provided (1) the interaction component of variance is adjusted for important variation between environments in the scale of genetic effects and (2) the variance component for the average effects of genetic groups is recognised as equivalent to the average covariance of the same genetic group in different environments (i.e. ) to include the real possibility of negative genetic correlation. It is shown that (1) response to selection for improved average performance over varying environments (ΔGt) is proportional to the genetic correlation between expressions of the same genotype in different environments (rG), that (2) gain in ΔGi, from measuring performance in k environments is proportional to if k times as many animals are tested, but to if total numbers per genotypic class (nk) are held constant, where g2 is heritability of individual variation within environments and rG is the correlation between the phenotypic expressions of the same genotype in different environments. Evidence is presented that (1) variations among poultry-farm environments in California cause important, but largely unpredictable, shifts in ranking of genetic stocks for egg production, and (2) improved accuracy i... Mostrar Tudo |
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Palavras-Chave: |
Ambiente; Inteiracao ambiental; Interação genótipo ambiente; Interacoes; Melhoramento gentico. |
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Thesagro: |
Genótipo. |
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Thesaurus Nal: |
Animal breeding; Genotype-environment interaction. |
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Categoria do assunto: |
P Recursos Naturais, Ciências Ambientais e da Terra |
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Marc: |
LEADER 02406naa a2200229 a 4500
001 1520263
005 2025-06-17
008 1962 bl uuuu u00u1 u #d
024 7 $ahttps://doi.org/10.1017/S0003356100034395$2DOI
100 1 $aDICKERSON, G. E.
245 $aImplications of genetic-environmental interaction in animal breeding.$h[electronic resource]
260 $c1962
520 $aThis report is an attempt to interpret evidence concerning geneticenvironmental interaction as it relates to the effectiveness of selection. Methods of estimating genetic-environmental interaction were investigated with the conclusion that the standard analysis of variance is a satisfactory tool provided (1) the interaction component of variance is adjusted for important variation between environments in the scale of genetic effects and (2) the variance component for the average effects of genetic groups is recognised as equivalent to the average covariance of the same genetic group in different environments (i.e. ) to include the real possibility of negative genetic correlation. It is shown that (1) response to selection for improved average performance over varying environments (ΔGt) is proportional to the genetic correlation between expressions of the same genotype in different environments (rG), that (2) gain in ΔGi, from measuring performance in k environments is proportional to if k times as many animals are tested, but to if total numbers per genotypic class (nk) are held constant, where g2 is heritability of individual variation within environments and rG is the correlation between the phenotypic expressions of the same genotype in different environments. Evidence is presented that (1) variations among poultry-farm environments in California cause important, but largely unpredictable, shifts in ranking of genetic stocks for egg production, and (2) improved accuracy in measuring genetic differences in average performance across environments probably justifies utilising a sample of 5 to 10 farms representing the range of environments for which the stock is bred.
650 $aAnimal breeding
650 $aGenotype-environment interaction
650 $aGenótipo
653 $aAmbiente
653 $aInteiracao ambiental
653 $aInteração genótipo ambiente
653 $aInteracoes
653 $aMelhoramento gentico
773 $tAnimal Production$gv. 4, n. 1, p. 47-63, 1962.
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Registro original: |
Embrapa Caprinos e Ovinos (CNPC) |
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| Acesso ao texto completo restrito à biblioteca da Embrapa Soja. Para informações adicionais entre em contato com valeria.cardoso@embrapa.br. |
Registro Completo
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Biblioteca(s): |
Embrapa Soja. |
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Data corrente: |
14/11/1996 |
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Data da última atualização: |
13/01/2009 |
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Autoria: |
RIGITANO, A.; SILVA, A. C. da; GAUDENCIO, C. de A.; NISIO, J.; POSSAMAI, J. C.; PHILIPOVSKY, J. F.; JAZAR, J. L.; PEREIRA, L. A.; PETRUCCI, G. L.; KISHINO, A. Y.; FERREIRA, B. R.; EMPINOTTI, C. M.; OSAKI, F.; ALBERINI, J. L.; CHAVES, J. C. D.; KARAWASA, M.; MOTTA, M. A. da; SCHINZEL, R. L.; PARRA, A. D.; RIEDE, C. R.; CAMPOS, L. A.; ALCOVER, M.; DAROS, E.; PAN, W. |
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Título: |
Resultados de ensaios de rendimento de cultivares de trigo zonas Norte e Oeste do Parana 1973 a 1975. |
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Ano de publicação: |
1976 |
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Fonte/Imprenta: |
[S.l.]: EMBRAPA, [1976?]. |
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Páginas: |
27p. |
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Idioma: |
Português |
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Notas: |
Trabalho apresentado na Reuniao da Comissao Norte Brasileira de Pesquisa de Trigo, Londrina, 1976. |
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Conteúdo: |
Planejamento de 1975: sinpose dos locais e dos ensaios, sinopse das cultivares e dos ensaios; Condicoes gerais dos experimentos em 1975; Doencas; Comparacao das cultivares: CIANO e CIANO F 67, INIA e INIA F 66, SONORA 64(R) e SONORA 64(S); "Poda" do trigo; Avaliacao das cultivares em 1975; Comparacao dos mais altos rendimentos de cada ano de trienio 1973-1975 em Cascavel; Resultados de 1973 a 1975; Informacoes de cultivares. |
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Palavras-Chave: |
Brasil; Cultivar; Integrated research; Parana; Pesquisa integrada; Yield. |
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Thesagro: |
Rendimento; Trigo. |
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Thesaurus NAL: |
Brazil; wheat. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 01855nam a2200529 a 4500
001 1445593
005 2009-01-13
008 1976 bl uuuu u0uu1 u #d
100 1 $aRIGITANO, A.
245 $aResultados de ensaios de rendimento de cultivares de trigo zonas Norte e Oeste do Parana 1973 a 1975.
260 $a[S.l.]: EMBRAPA, [1976?].$c1976
300 $a27p.
500 $aTrabalho apresentado na Reuniao da Comissao Norte Brasileira de Pesquisa de Trigo, Londrina, 1976.
520 $aPlanejamento de 1975: sinpose dos locais e dos ensaios, sinopse das cultivares e dos ensaios; Condicoes gerais dos experimentos em 1975; Doencas; Comparacao das cultivares: CIANO e CIANO F 67, INIA e INIA F 66, SONORA 64(R) e SONORA 64(S); "Poda" do trigo; Avaliacao das cultivares em 1975; Comparacao dos mais altos rendimentos de cada ano de trienio 1973-1975 em Cascavel; Resultados de 1973 a 1975; Informacoes de cultivares.
650 $aBrazil
650 $awheat
650 $aRendimento
650 $aTrigo
653 $aBrasil
653 $aCultivar
653 $aIntegrated research
653 $aParana
653 $aPesquisa integrada
653 $aYield
700 1 $aSILVA, A. C. da
700 1 $aGAUDENCIO, C. de A.
700 1 $aNISIO, J.
700 1 $aPOSSAMAI, J. C.
700 1 $aPHILIPOVSKY, J. F.
700 1 $aJAZAR, J. L.
700 1 $aPEREIRA, L. A.
700 1 $aPETRUCCI, G. L.
700 1 $aKISHINO, A. Y.
700 1 $aFERREIRA, B. R.
700 1 $aEMPINOTTI, C. M.
700 1 $aOSAKI, F.
700 1 $aALBERINI, J. L.
700 1 $aCHAVES, J. C. D.
700 1 $aKARAWASA, M.
700 1 $aMOTTA, M. A. da
700 1 $aSCHINZEL, R. L.
700 1 $aPARRA, A. D.
700 1 $aRIEDE, C. R.
700 1 $aCAMPOS, L. A.
700 1 $aALCOVER, M.
700 1 $aDAROS, E.
700 1 $aPAN, W.
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