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Registro Completo |
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Biblioteca(s): |
Embrapa Gado de Leite. |
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Data corrente: |
23/01/2017 |
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Data da última atualização: |
30/01/2023 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
PEREZ, B. C.; PEIXOTO, M. G. C. D.; BRUNELI, F. A. T.; RAMOS, P. V. B.; BALIEIRO, J. C. C. |
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Afiliação: |
B. C. Perez; MARIA GABRIELA CAMPOLINA D PEIXOTO, CNPGL; FRANK ANGELO TOMITA BRUNELI, CNPGL; P.V.B. Ramos; J. C. C. Balieiro. |
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Título: |
Genetic analysis of oocyte and embryo production traits in Guzerá breed donors and their associations with age at first calving. |
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Ano de publicação: |
2016 |
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Fonte/Imprenta: |
Genetics and Molecular Research, v. 15, n. 2, 2016. |
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Páginas: |
9 p. |
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Idioma: |
Português |
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Conteúdo: |
Abstract: The objective of this study was to estimate variance components for oocyte and embryo production traits in Guzerá breed female donors, and investigate their associations with age at first calving (AFC). The traits analyzed were the number of viable oocytes (NOV), the number of grade I oocytes (NGI), the number of cleaved embryos (NCLV), and viable embryos produced (NEMB), and the percentages of viable oocytes (POV), grade I oocytes (PGI), cleaved embryos (PCLV), and viable embryos (PEMB). Data were obtained from 5173 ovary puncture and in vitro fertilization (IVF) sessions using 1080 Guzerá female donors of different ages, occurred from March 2005 to July 2013. Variables were log-transformed (logeX+1) prior to analysis. (Co)variance components were estimated by restricted maximum likelihood (REML), using one- and two-trait animal models. Permanent environment and IVF sire (father of the embryos) random effects were included. Estimated heritabilities for NOV, NGI, NCLV, NEMB, POV, PGI, PCLV, and PEMB were 0.19, 0.08, 0.16, 0.14, 0.04, 0.03, 0.01, and 0.07, respectively. Repeatabilities for count traits (NOV, NGI, NCLV, and NEMB) varied from 0.14 and 0.32, higher than estimated for percentage traits (POV, PGI, PCLV, and PEMB), which varied from 0.01 to 0.08. Selection for NOV may be more appropriate in breeding programs than selection for NEMB, because of its strong genetic correlation (0.68) with NEMB and its greater time- and cost-effectiveness. AFC was only weakly associated with the oocyte and embryo production traits, which indicates that there would be no effect on AFC when selecting for these traits. MenosAbstract: The objective of this study was to estimate variance components for oocyte and embryo production traits in Guzerá breed female donors, and investigate their associations with age at first calving (AFC). The traits analyzed were the number of viable oocytes (NOV), the number of grade I oocytes (NGI), the number of cleaved embryos (NCLV), and viable embryos produced (NEMB), and the percentages of viable oocytes (POV), grade I oocytes (PGI), cleaved embryos (PCLV), and viable embryos (PEMB). Data were obtained from 5173 ovary puncture and in vitro fertilization (IVF) sessions using 1080 Guzerá female donors of different ages, occurred from March 2005 to July 2013. Variables were log-transformed (logeX+1) prior to analysis. (Co)variance components were estimated by restricted maximum likelihood (REML), using one- and two-trait animal models. Permanent environment and IVF sire (father of the embryos) random effects were included. Estimated heritabilities for NOV, NGI, NCLV, NEMB, POV, PGI, PCLV, and PEMB were 0.19, 0.08, 0.16, 0.14, 0.04, 0.03, 0.01, and 0.07, respectively. Repeatabilities for count traits (NOV, NGI, NCLV, and NEMB) varied from 0.14 and 0.32, higher than estimated for percentage traits (POV, PGI, PCLV, and PEMB), which varied from 0.01 to 0.08. Selection for NOV may be more appropriate in breeding programs than selection for NEMB, because of its strong genetic correlation (0.68) with NEMB and its greater time- and cost-effectiveness. AFC was only weakly... Mostrar Tudo |
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Palavras-Chave: |
Bivariate analysis; Genetic parameter; Ovum pick-up; Permanent environment; Zebu cattle. |
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Thesaurus Nal: |
in vitro fertilization. |
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Categoria do assunto: |
L Ciência Animal e Produtos de Origem Animal |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/153751/1/Cnpgl-2016-GMR-Genetic.pdf
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Marc: |
LEADER 02432naa a2200253 a 4500
001 2061463
005 2023-01-30
008 2016 bl uuuu u00u1 u #d
100 1 $aPEREZ, B. C.
245 $aGenetic analysis of oocyte and embryo production traits in Guzerá breed donors and their associations with age at first calving.$h[electronic resource]
260 $c2016
300 $a9 p.
520 $aAbstract: The objective of this study was to estimate variance components for oocyte and embryo production traits in Guzerá breed female donors, and investigate their associations with age at first calving (AFC). The traits analyzed were the number of viable oocytes (NOV), the number of grade I oocytes (NGI), the number of cleaved embryos (NCLV), and viable embryos produced (NEMB), and the percentages of viable oocytes (POV), grade I oocytes (PGI), cleaved embryos (PCLV), and viable embryos (PEMB). Data were obtained from 5173 ovary puncture and in vitro fertilization (IVF) sessions using 1080 Guzerá female donors of different ages, occurred from March 2005 to July 2013. Variables were log-transformed (logeX+1) prior to analysis. (Co)variance components were estimated by restricted maximum likelihood (REML), using one- and two-trait animal models. Permanent environment and IVF sire (father of the embryos) random effects were included. Estimated heritabilities for NOV, NGI, NCLV, NEMB, POV, PGI, PCLV, and PEMB were 0.19, 0.08, 0.16, 0.14, 0.04, 0.03, 0.01, and 0.07, respectively. Repeatabilities for count traits (NOV, NGI, NCLV, and NEMB) varied from 0.14 and 0.32, higher than estimated for percentage traits (POV, PGI, PCLV, and PEMB), which varied from 0.01 to 0.08. Selection for NOV may be more appropriate in breeding programs than selection for NEMB, because of its strong genetic correlation (0.68) with NEMB and its greater time- and cost-effectiveness. AFC was only weakly associated with the oocyte and embryo production traits, which indicates that there would be no effect on AFC when selecting for these traits.
650 $ain vitro fertilization
653 $aBivariate analysis
653 $aGenetic parameter
653 $aOvum pick-up
653 $aPermanent environment
653 $aZebu cattle
700 1 $aPEIXOTO, M. G. C. D.
700 1 $aBRUNELI, F. A. T.
700 1 $aRAMOS, P. V. B.
700 1 $aBALIEIRO, J. C. C.
773 $tGenetics and Molecular Research$gv. 15, n. 2, 2016.
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Registro original: |
Embrapa Gado de Leite (CNPGL) |
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 | Acesso ao texto completo restrito à biblioteca da Embrapa Instrumentação. Para informações adicionais entre em contato com cnpdia.biblioteca@embrapa.br. |
Registro Completo
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Biblioteca(s): |
Embrapa Instrumentação. |
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Data corrente: |
23/06/2003 |
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Data da última atualização: |
07/05/2008 |
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Autoria: |
MILORI, D. M. B. P.; MARTIN-NETO, L.; BAGNATO, V. S.; BAYER, C.; MIELNICZUCK, J. |
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Afiliação: |
Embrapa Instrumentação Agropecuária, São Carlos, SP. |
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Título: |
Photoluminescence spectroscopy to evaluate soil humic acids under different tillage systems |
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Ano de publicação: |
2002 |
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Fonte/Imprenta: |
In: INTERNATIONAL HUMIC SUBSTANCES SOCIETY-IHSS; ANNIVERSARY CONFERENCE, 20., 2002, Boston. IHSS 2002: humic substances: nature's most versatile materials.proceedings. Boston: Northeastern University, 2002. |
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Páginas: |
p. 35-37. |
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Idioma: |
Inglês |
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Conteúdo: |
Fluorescence showed to be a very sensitive tool to measure structural changes of soil humic acid under different tillage. When excited at 240 nm the fluorescence spectra shows a red shift regarding with forest soil, suggesting an increase of (...) size of the molecule, and consequently soil degradtion. The excitation at 465 nm seems to be associated with humidcation of humic substances and it should be used as a humification index to evaluate soil quality. The correlation between fluorescence techniques to evaluate humification index was very high and consistent with ESR measurements. |
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Palavras-Chave: |
Ácido húmico; Espectroscopia; Fotoluminescência; Substâncias húmicas. |
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Thesagro: |
Solo. |
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Thesaurus NAL: |
humic acids; humic substances; photoluminescence; soil; spectroscopy. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 01568naa a2200301 a 4500
001 1024756
005 2008-05-07
008 2002 bl --- 0-- u #d
100 1 $aMILORI, D. M. B. P.
245 $aPhotoluminescence spectroscopy to evaluate soil humic acids under different tillage systems
260 $c2002
300 $ap. 35-37.
520 $aFluorescence showed to be a very sensitive tool to measure structural changes of soil humic acid under different tillage. When excited at 240 nm the fluorescence spectra shows a red shift regarding with forest soil, suggesting an increase of (...) size of the molecule, and consequently soil degradtion. The excitation at 465 nm seems to be associated with humidcation of humic substances and it should be used as a humification index to evaluate soil quality. The correlation between fluorescence techniques to evaluate humification index was very high and consistent with ESR measurements.
650 $ahumic acids
650 $ahumic substances
650 $aphotoluminescence
650 $asoil
650 $aspectroscopy
650 $aSolo
653 $aÁcido húmico
653 $aEspectroscopia
653 $aFotoluminescência
653 $aSubstâncias húmicas
700 1 $aMARTIN-NETO, L.
700 1 $aBAGNATO, V. S.
700 1 $aBAYER, C.
700 1 $aMIELNICZUCK, J.
773 $tIn: INTERNATIONAL HUMIC SUBSTANCES SOCIETY-IHSS; ANNIVERSARY CONFERENCE, 20., 2002, Boston. IHSS 2002: humic substances: nature's most versatile materials.proceedings. Boston: Northeastern University, 2002.
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Embrapa Instrumentação (CNPDIA) |
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