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Registro Completo |
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Biblioteca(s): |
Embrapa Cerrados. |
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Data corrente: |
11/01/1999 |
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Data da última atualização: |
11/01/1999 |
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Autoria: |
BONOMO, R.; MANTOVANI, E. C.; SEDIYAMA, G. C. |
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Título: |
Estudo comparativo de modelos de estimativa da evapotranspiracao de referencia (ETo) para as regioes cafeeiras do Triangulo e Noroeste de Minas Gerais. |
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Ano de publicação: |
1998 |
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Fonte/Imprenta: |
In: CONGRESSO BRASILEIRO DE ENGENHARIA AGRICOLA, 27., 1998, Pocos de Caldas, MG. Anais. Pocos de Caldas: SBEA/UFLA, 1998. |
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Volume: |
v.1. |
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Páginas: |
p.307-309. |
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Idioma: |
Português |
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Conteúdo: |
No presente trabalho avaliou-se a ETo estimada pelos metodos de Kimberley Penman (Kpen); Penman FAO (FcPn); Penman FAO sem correcao (Pen); Penman original (63Pn); Hargreaves e Samani (Harg); Radiacao-FAO(Frad); Blaney e Criddle FAO (FBC); e Thornthwaite simplificado por Camargo (Camargo) para as regioes cafeeiras do Triangulo e Noroeste de Minas Gerias, tomando-se como referencia o metodo recomendado de Penman-Motheith, para o calculo da ETo da cultura hipotetica. Utilizou-se de dados climaticos diarios para o calculo da ETo. Os resultados encontrados indicam boas estimativas da ETo para todos os metodos avaliados, a excecao dos metodos de Harg e Camargo. O metodo Camargo apresenta uma tendencia clara de subestimacao da ETo chegando a subestimar em media ate 32% a ETo. Os resultados indicam que o metodo de FB-C pode ser utilizado sem ajuste local para a estimativa da ETo para as duas regioes estudadas. |
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Palavras-Chave: |
Brasil; Minas Gerias. |
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Thesagro: |
Café; Cerrado; Coffea Arábica; Evapotranspiração. |
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Thesaurus Nal: |
Brazil; evapotranspiration. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 01750naa a2200265 a 4500
001 1544481
005 1999-01-11
008 1998 bl uuuu u00u1 u #d
100 1 $aBONOMO, R.
245 $aEstudo comparativo de modelos de estimativa da evapotranspiracao de referencia (ETo) para as regioes cafeeiras do Triangulo e Noroeste de Minas Gerais.
260 $c1998
300 $ap.307-309. v.1.
490 $vv.1.
520 $aNo presente trabalho avaliou-se a ETo estimada pelos metodos de Kimberley Penman (Kpen); Penman FAO (FcPn); Penman FAO sem correcao (Pen); Penman original (63Pn); Hargreaves e Samani (Harg); Radiacao-FAO(Frad); Blaney e Criddle FAO (FBC); e Thornthwaite simplificado por Camargo (Camargo) para as regioes cafeeiras do Triangulo e Noroeste de Minas Gerias, tomando-se como referencia o metodo recomendado de Penman-Motheith, para o calculo da ETo da cultura hipotetica. Utilizou-se de dados climaticos diarios para o calculo da ETo. Os resultados encontrados indicam boas estimativas da ETo para todos os metodos avaliados, a excecao dos metodos de Harg e Camargo. O metodo Camargo apresenta uma tendencia clara de subestimacao da ETo chegando a subestimar em media ate 32% a ETo. Os resultados indicam que o metodo de FB-C pode ser utilizado sem ajuste local para a estimativa da ETo para as duas regioes estudadas.
650 $aBrazil
650 $aevapotranspiration
650 $aCafé
650 $aCerrado
650 $aCoffea Arábica
650 $aEvapotranspiração
653 $aBrasil
653 $aMinas Gerias
700 1 $aMANTOVANI, E. C.
700 1 $aSEDIYAMA, G. C.
773 $tIn: CONGRESSO BRASILEIRO DE ENGENHARIA AGRICOLA, 27., 1998, Pocos de Caldas, MG. Anais. Pocos de Caldas: SBEA/UFLA, 1998.
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Registro original: |
Embrapa Cerrados (CPAC) |
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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. |
Registro Completo
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Biblioteca(s): |
Embrapa Pecuária Sul. |
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Data corrente: |
15/12/2017 |
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Data da última atualização: |
15/12/2017 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
A - 1 |
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Autoria: |
MACNEIL, M. D.; CARDOSO, F. F.; HAY, E. |
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Afiliação: |
M. D. MacNeil; FERNANDO FLORES CARDOSO, CPPSUL; E. Hay. |
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Título: |
Genotype by environment interaction effects in genetic evaluation of preweaning gain for Line 1 Hereford cattle from Miles City, Montana. |
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Ano de publicação: |
2017 |
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Fonte/Imprenta: |
Journal of Animal Science, v. 95, n. 9, p. 3833-3838, 2017. |
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Idioma: |
Inglês |
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Conteúdo: |
It has long been recognized that genotype × environment interaction potentially influences genetic evaluation of beef cattle. However, this recognition has largely been ignored in systems for national cattle evaluation. The objective of this investigation was to determine if direct and maternal genetic effects on preweaning gain would be reranked depending on an environmental gradient as determined by year effects. Data used were from the 76-yr selection experiment with the Line 1 Hereford cattle raised at Miles City, MT. The data comprised recorded phenotypes from 7,566 animals and an additional 1,862 ancestral records included in the pedigree. The presence of genotype × environment interaction was examined using reaction norms wherein year effects on preweaning gain were hypothesized to linearly influence the EBV. Estimates of heritability for direct and maternal effects, given the average environment, were 10 ± 2 and 26 ± 3%, respectively. In an environment that is characterized by the 5th (95th) percentile of the distribution of year effects, the corresponding estimates of heritability were 18 ± 3 (22 ± 3%) and 30 ± 3% (30 ± 3%), respectively. Rank correlations of direct and maternal EBV appropriate to the 5th and 95th percentiles of the year effects were 0.67 and 0.92, respectively. In the average environment, the genetic trends were 255 ± 1 g/yr for direct effects and 557 ± 3 g/yr for maternal effects. In the fifth percentile environment, the corresponding estimates of genetic trend were 271 ± 1 and 540 ± 3 g/yr, respectively, and in the 95th percentile environment, they were 236 ± 1 and 578 ± 3 g/yr, respectively. Linear genetic trends in environmental sensitivity were observed for both the direct (?8.06 × 10?? ± 0.49 × 10??) and maternal (8.72 × 10?? ± 0.43 × 10??) effects. Therefore, changing systems of national cattle evaluation to more fully account for potential genotype × environment interaction would improve the assessment of breeding stock, particularly for direct effects. Estimates of environmental sensitivity parameters could also facilitate identification of genetic limitations to production. MenosIt has long been recognized that genotype × environment interaction potentially influences genetic evaluation of beef cattle. However, this recognition has largely been ignored in systems for national cattle evaluation. The objective of this investigation was to determine if direct and maternal genetic effects on preweaning gain would be reranked depending on an environmental gradient as determined by year effects. Data used were from the 76-yr selection experiment with the Line 1 Hereford cattle raised at Miles City, MT. The data comprised recorded phenotypes from 7,566 animals and an additional 1,862 ancestral records included in the pedigree. The presence of genotype × environment interaction was examined using reaction norms wherein year effects on preweaning gain were hypothesized to linearly influence the EBV. Estimates of heritability for direct and maternal effects, given the average environment, were 10 ± 2 and 26 ± 3%, respectively. In an environment that is characterized by the 5th (95th) percentile of the distribution of year effects, the corresponding estimates of heritability were 18 ± 3 (22 ± 3%) and 30 ± 3% (30 ± 3%), respectively. Rank correlations of direct and maternal EBV appropriate to the 5th and 95th percentiles of the year effects were 0.67 and 0.92, respectively. In the average environment, the genetic trends were 255 ± 1 g/yr for direct effects and 557 ± 3 g/yr for maternal effects. In the fifth percentile environment, the corresponding estimates of... Mostrar Tudo |
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Thesagro: |
Gado de corte. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 02697naa a2200157 a 4500
001 2082708
005 2017-12-15
008 2017 bl uuuu u00u1 u #d
100 1 $aMACNEIL, M. D.
245 $aGenotype by environment interaction effects in genetic evaluation of preweaning gain for Line 1 Hereford cattle from Miles City, Montana.$h[electronic resource]
260 $c2017
520 $aIt has long been recognized that genotype × environment interaction potentially influences genetic evaluation of beef cattle. However, this recognition has largely been ignored in systems for national cattle evaluation. The objective of this investigation was to determine if direct and maternal genetic effects on preweaning gain would be reranked depending on an environmental gradient as determined by year effects. Data used were from the 76-yr selection experiment with the Line 1 Hereford cattle raised at Miles City, MT. The data comprised recorded phenotypes from 7,566 animals and an additional 1,862 ancestral records included in the pedigree. The presence of genotype × environment interaction was examined using reaction norms wherein year effects on preweaning gain were hypothesized to linearly influence the EBV. Estimates of heritability for direct and maternal effects, given the average environment, were 10 ± 2 and 26 ± 3%, respectively. In an environment that is characterized by the 5th (95th) percentile of the distribution of year effects, the corresponding estimates of heritability were 18 ± 3 (22 ± 3%) and 30 ± 3% (30 ± 3%), respectively. Rank correlations of direct and maternal EBV appropriate to the 5th and 95th percentiles of the year effects were 0.67 and 0.92, respectively. In the average environment, the genetic trends were 255 ± 1 g/yr for direct effects and 557 ± 3 g/yr for maternal effects. In the fifth percentile environment, the corresponding estimates of genetic trend were 271 ± 1 and 540 ± 3 g/yr, respectively, and in the 95th percentile environment, they were 236 ± 1 and 578 ± 3 g/yr, respectively. Linear genetic trends in environmental sensitivity were observed for both the direct (?8.06 × 10?? ± 0.49 × 10??) and maternal (8.72 × 10?? ± 0.43 × 10??) effects. Therefore, changing systems of national cattle evaluation to more fully account for potential genotype × environment interaction would improve the assessment of breeding stock, particularly for direct effects. Estimates of environmental sensitivity parameters could also facilitate identification of genetic limitations to production.
650 $aGado de corte
700 1 $aCARDOSO, F. F.
700 1 $aHAY, E.
773 $tJournal of Animal Science$gv. 95, n. 9, p. 3833-3838, 2017.
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