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 | Acesso ao texto completo restrito à biblioteca da Embrapa Gado de Corte. Para informações adicionais entre em contato com cnpgc.biblioteca@embrapa.br. |
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Registro Completo |
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Biblioteca(s): |
Embrapa Gado de Corte. |
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Data corrente: |
10/07/2009 |
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Data da última atualização: |
25/07/2023 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
BOLDRINI, K. R.; PAGLIARINI, M. S.; VALLE, C. B. do. |
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Afiliação: |
KELLEN REGINA BOLDRINI, UNIVERSIDADE ESTADUAL DE MARINGÁ; MARIA SUELY PAGLIARINI, UNIVERSIDADE ESTADUAL DE MARINGÁ; CACILDA BORGES DO VALLE, CNPGC. |
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Título: |
Abnormal timing of cytokinesis in microsporogenesis in Brachiaria humidicola (Poaceae: Paniceae). |
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Ano de publicação: |
2006 |
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Fonte/Imprenta: |
Journal of Genetics, Bangalore, v. 85, n. 3, p. 225-228, Dec. 2006 |
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Idioma: |
Inglês |
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Notas: |
Research note. |
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Conteúdo: |
Meiosis is controlled by a large number of genes, generally dominant, whose expression is stage-specific, site-specific and time-specific (Gottschalk and Kaul 1974, 1980a,b; Baker et al. 1976; Golubovskaya 1979, 1989). Among genes acting in the meiotic process, those responsible for the partitioning of the cytoplasm after nuclear division play a very important role in the formation of viable gametes. After two rounds of chromosome segregation (karyokinesis) and one simultaneous or two successive cytoplasmic divisions (cytokinesis), the final product of male meiosis in flowering plants emerges as a tetrad of haploid microspores enclosed in a callose wall. The timing of cytokinesis varies among angiosperms. In most monocot plants, cytokinesis is successive, i.e. one partitioning of the cytoplasm occurs after telophase I and another after telophase II, so that there is a distinct dyad stage. However, in most dicots, it is simultaneous and occurs after telophase II (Peirson et al. 1996). Many meiosis mutations affecting the pattern of cytokinesis have been reported in higher plants (Peirson et al. 1996). In Brachiaria, a promising African genus of forage grass for the Brazilian savannas, absence of cytokinesis leading to 2n microspores and binucleated or tetranucleated microspores have been reported in B. brizantha (Risso-Pascotto et al. 2003) and B. nigropedata (Utsunomiya et al. 2005). The present study details meiotic and postmeiotic abnormalities related to cytokinesis observed in one accession of B. humidicola. MenosMeiosis is controlled by a large number of genes, generally dominant, whose expression is stage-specific, site-specific and time-specific (Gottschalk and Kaul 1974, 1980a,b; Baker et al. 1976; Golubovskaya 1979, 1989). Among genes acting in the meiotic process, those responsible for the partitioning of the cytoplasm after nuclear division play a very important role in the formation of viable gametes. After two rounds of chromosome segregation (karyokinesis) and one simultaneous or two successive cytoplasmic divisions (cytokinesis), the final product of male meiosis in flowering plants emerges as a tetrad of haploid microspores enclosed in a callose wall. The timing of cytokinesis varies among angiosperms. In most monocot plants, cytokinesis is successive, i.e. one partitioning of the cytoplasm occurs after telophase I and another after telophase II, so that there is a distinct dyad stage. However, in most dicots, it is simultaneous and occurs after telophase II (Peirson et al. 1996). Many meiosis mutations affecting the pattern of cytokinesis have been reported in higher plants (Peirson et al. 1996). In Brachiaria, a promising African genus of forage grass for the Brazilian savannas, absence of cytokinesis leading to 2n microspores and binucleated or tetranucleated microspores have been reported in B. brizantha (Risso-Pascotto et al. 2003) and B. nigropedata (Utsunomiya et al. 2005). The present study details meiotic and postmeiotic abnormalities related to cytokinesis obser... Mostrar Tudo |
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Palavras-Chave: |
Braquiária; Microsporogênese. |
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Thesagro: |
Brachiaria Humidicola; Gramínea Forrageira; Melhoramento Genético Vegetal; Pastagem; Poliploidia. |
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Thesaurus Nal: |
Cytokinesis; Forage grasses; Meiosis; Microsporogenesis; Polyploidy. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 02404naa a2200301 a 4500
001 1327021
005 2023-07-25
008 2006 bl uuuu u00u1 u #d
100 1 $aBOLDRINI, K. R.
245 $aAbnormal timing of cytokinesis in microsporogenesis in Brachiaria humidicola (Poaceae$bPaniceae).
260 $c2006
500 $aResearch note.
520 $aMeiosis is controlled by a large number of genes, generally dominant, whose expression is stage-specific, site-specific and time-specific (Gottschalk and Kaul 1974, 1980a,b; Baker et al. 1976; Golubovskaya 1979, 1989). Among genes acting in the meiotic process, those responsible for the partitioning of the cytoplasm after nuclear division play a very important role in the formation of viable gametes. After two rounds of chromosome segregation (karyokinesis) and one simultaneous or two successive cytoplasmic divisions (cytokinesis), the final product of male meiosis in flowering plants emerges as a tetrad of haploid microspores enclosed in a callose wall. The timing of cytokinesis varies among angiosperms. In most monocot plants, cytokinesis is successive, i.e. one partitioning of the cytoplasm occurs after telophase I and another after telophase II, so that there is a distinct dyad stage. However, in most dicots, it is simultaneous and occurs after telophase II (Peirson et al. 1996). Many meiosis mutations affecting the pattern of cytokinesis have been reported in higher plants (Peirson et al. 1996). In Brachiaria, a promising African genus of forage grass for the Brazilian savannas, absence of cytokinesis leading to 2n microspores and binucleated or tetranucleated microspores have been reported in B. brizantha (Risso-Pascotto et al. 2003) and B. nigropedata (Utsunomiya et al. 2005). The present study details meiotic and postmeiotic abnormalities related to cytokinesis observed in one accession of B. humidicola.
650 $aCytokinesis
650 $aForage grasses
650 $aMeiosis
650 $aMicrosporogenesis
650 $aPolyploidy
650 $aBrachiaria Humidicola
650 $aGramínea Forrageira
650 $aMelhoramento Genético Vegetal
650 $aPastagem
650 $aPoliploidia
653 $aBraquiária
653 $aMicrosporogênese
700 1 $aPAGLIARINI, M. S.
700 1 $aVALLE, C. B. do
773 $tJournal of Genetics, Bangalore$gv. 85, n. 3, p. 225-228, Dec. 2006
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Embrapa Gado de Corte (CNPGC) |
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Registro Completo
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Biblioteca(s): |
Embrapa Suínos e Aves. |
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Data corrente: |
11/05/2017 |
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Data da última atualização: |
11/05/2017 |
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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: |
FRANCO, S. M.; TAVERNARI, F. de C.; MAIA, R. C.; BARROS, V. R. S. M.; ALBINO, L. F. T.; ROSTAGNO, H. S.; LELIS, G. R.; CALDERANO, A. A.; DILGER, R. N. |
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Afiliação: |
SEBASTIAN M., Premex S.A.; FERNANDO DE CASTRO TAVERNARI, CNPSA; ROSANA CARDOSO MAIA, UFV; VICTOR R. S. M. BARROS, UFV; LUIZ FERNANDO TEIXEIRA ALBINO, UFV; HORÁCIO SANTIAGO ROSTAGNO, UFV; GUILHERME RODRIGUES LELIS, UFV; ARELE ARLINDO CALDERANO, UFV; RYAN NEIL DILGER, University of Illinois. |
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Título: |
Estimation of optimal ratios of digestible phenylalanine + tyrosine, histidine, and leucine to digestible lysine for performance and breast yield in broilers. |
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Ano de publicação: |
2017 |
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Fonte/Imprenta: |
Poultry Science, v. 96, p. 829-837, 2017. |
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Idioma: |
Inglês |
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Conteúdo: |
ABSTRACT Three experiments were carried out to estimate the optimal ratios of digestible phenylalanine + tyrosine (Phe + Tyr), histidine (His), and leucine (Leu) relative to digestible lysine (Lys) for performance and carcass criteria of Cobb-500 broilers from 8 to 17 d of age. In each experiment, 160 male chicks were allocated to a completely randomized experimental design with eight replicate pens, each receiving five dietary treatments. A common, semi-purified basal diet was formulated to meet all dietary recommendations except for those of the tested amino acids (i.e., Phe + Tyr, His, and Leu). Growth performance and carcass characteristics data were analyzed using various requirement-estimation models, including 95% of the quadratic regression, linear response plateau (LRP; i.e., stepwise regression), LRP-to-quadratic regression ratio; and quadratic broken line (QBL). Graded digestible Phe + Tyr ratios elicited a quadratic response (P < 0.05) in body weight gain and linear responses (P < 0.05) in breast and breast fillet weights. Linear effects (P < 0.05) were also observed when graded ratios of digestible His were fed for feed intake and weight gain, and quadratic responses (P < 0.05) were noted for feed conversion ratio and breast and breast fillet weights and yields. Graded Leu ratios elicited quadratic responses (P < 0.05) in feed intake, weight gain, and breast and breast fillet weight and yield. Based on growth and carcass parameters, the estimated ideal digestible ratios of Phe + Tyr, His, and Leu relative to digestible Lys were 112, 38, and 104%, respectively, for broiler chicks raised from 8 to 17 d of age. MenosABSTRACT Three experiments were carried out to estimate the optimal ratios of digestible phenylalanine + tyrosine (Phe + Tyr), histidine (His), and leucine (Leu) relative to digestible lysine (Lys) for performance and carcass criteria of Cobb-500 broilers from 8 to 17 d of age. In each experiment, 160 male chicks were allocated to a completely randomized experimental design with eight replicate pens, each receiving five dietary treatments. A common, semi-purified basal diet was formulated to meet all dietary recommendations except for those of the tested amino acids (i.e., Phe + Tyr, His, and Leu). Growth performance and carcass characteristics data were analyzed using various requirement-estimation models, including 95% of the quadratic regression, linear response plateau (LRP; i.e., stepwise regression), LRP-to-quadratic regression ratio; and quadratic broken line (QBL). Graded digestible Phe + Tyr ratios elicited a quadratic response (P < 0.05) in body weight gain and linear responses (P < 0.05) in breast and breast fillet weights. Linear effects (P < 0.05) were also observed when graded ratios of digestible His were fed for feed intake and weight gain, and quadratic responses (P < 0.05) were noted for feed conversion ratio and breast and breast fillet weights and yields. Graded Leu ratios elicited quadratic responses (P < 0.05) in feed intake, weight gain, and breast and breast fillet weight and yield. Based on growth and carcass parameters, the estimated ideal digestibl... Mostrar Tudo |
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Palavras-Chave: |
Digestible amino acid; Peito de frango. |
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Thesagro: |
Aminoácido; Digestibilidade; Enzima; Frango de corte; Nutrição animal; Sistema de produção. |
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Thesaurus NAL: |
Animal nutrition; Breast meat; Broiler chickens; Digestibility; Histidine; Leucine; phenylalanine; Poultry production; tyrosine. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 02882naa a2200421 a 4500
001 2069526
005 2017-05-11
008 2017 bl uuuu u00u1 u #d
100 1 $aFRANCO, S. M.
245 $aEstimation of optimal ratios of digestible phenylalanine + tyrosine, histidine, and leucine to digestible lysine for performance and breast yield in broilers.$h[electronic resource]
260 $c2017
520 $aABSTRACT Three experiments were carried out to estimate the optimal ratios of digestible phenylalanine + tyrosine (Phe + Tyr), histidine (His), and leucine (Leu) relative to digestible lysine (Lys) for performance and carcass criteria of Cobb-500 broilers from 8 to 17 d of age. In each experiment, 160 male chicks were allocated to a completely randomized experimental design with eight replicate pens, each receiving five dietary treatments. A common, semi-purified basal diet was formulated to meet all dietary recommendations except for those of the tested amino acids (i.e., Phe + Tyr, His, and Leu). Growth performance and carcass characteristics data were analyzed using various requirement-estimation models, including 95% of the quadratic regression, linear response plateau (LRP; i.e., stepwise regression), LRP-to-quadratic regression ratio; and quadratic broken line (QBL). Graded digestible Phe + Tyr ratios elicited a quadratic response (P < 0.05) in body weight gain and linear responses (P < 0.05) in breast and breast fillet weights. Linear effects (P < 0.05) were also observed when graded ratios of digestible His were fed for feed intake and weight gain, and quadratic responses (P < 0.05) were noted for feed conversion ratio and breast and breast fillet weights and yields. Graded Leu ratios elicited quadratic responses (P < 0.05) in feed intake, weight gain, and breast and breast fillet weight and yield. Based on growth and carcass parameters, the estimated ideal digestible ratios of Phe + Tyr, His, and Leu relative to digestible Lys were 112, 38, and 104%, respectively, for broiler chicks raised from 8 to 17 d of age.
650 $aAnimal nutrition
650 $aBreast meat
650 $aBroiler chickens
650 $aDigestibility
650 $aHistidine
650 $aLeucine
650 $aphenylalanine
650 $aPoultry production
650 $atyrosine
650 $aAminoácido
650 $aDigestibilidade
650 $aEnzima
650 $aFrango de corte
650 $aNutrição animal
650 $aSistema de produção
653 $aDigestible amino acid
653 $aPeito de frango
700 1 $aTAVERNARI, F. de C.
700 1 $aMAIA, R. C.
700 1 $aBARROS, V. R. S. M.
700 1 $aALBINO, L. F. T.
700 1 $aROSTAGNO, H. S.
700 1 $aLELIS, G. R.
700 1 $aCALDERANO, A. A.
700 1 $aDILGER, R. N.
773 $tPoultry Science$gv. 96, p. 829-837, 2017.
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