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Registro Completo |
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Biblioteca(s): |
Embrapa Caprinos e Ovinos. |
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Data corrente: |
12/02/2016 |
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Data da última atualização: |
17/05/2022 |
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Tipo da produção científica: |
Artigo em Anais de Congresso |
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Autoria: |
ALVES, M. M. de A.; CÂNDIDO, M. J. D.; ROCHA, J. E. da S.; CAVALCANTE, A. C. R.; BUENO, L. G.; SANTOS, F. G. R. dos; OLIVEIRA, L. B. de. |
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Afiliação: |
Maria Monique de Araújo Alves; Magno José Duarte Cândido; JULIANA EVANGELISTA DA SILVA ROCHA, CNPC; ANA CLARA RODRIGUES CAVALCANTE, CNPC; LUICE GOMES BUENO, CNPC; Francisca Gizele Rodrigues dos Santos; Leydiane Bezerra de Oliveira. |
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Título: |
Avaliação de características estruturais de acessos de Urochloa mosambicensis. |
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Ano de publicação: |
2015 |
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Fonte/Imprenta: |
In: CONGRESSO BRASILEIRO DE ZOOTECNIA, 25., 2015, Fortaleza. Dimensões tecnológicas e sociais da zootecnia: anais. Fortaleza: Sociedade Brasileira de Zootecnia, 2015. 3 f. |
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Idioma: |
Português |
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Conteúdo: |
Resumo: Com o intuito de melhorar a produção de forragem no semiárido estão sendo introduzidas na região várias espécies de gramíneas, com a finalidade de aumentar os índices de produção animal e diversificação de forragem. Objetivou-se com o referente trabalho fornecer informações sobre características estruturais do capim-corrente. O experimento foi conduzido na casa de vegetação da Embrapa Caprinos e Ovinos, em Sobral, CE. O acompanhamento da dinâmica de desenvolvimento foliar ocorreu no período de março a abril de 2014, obedecendo à metodologia dos perfilhos marcados. O delineamento utilizado foi inteiramente casualizado, com 12 tratamentos e duas repetições. Foi realizada estimativa de biomassa por coleta destrutiva aos 30 dias. Não houve diferença significativa para a maioria dos componentes da biomassa. A variável que apresentou diferença estatística foi a relação LF/C. Para o componente vegetativo a melhor relação LF/C foi em Aust 101P1 e Aust 102P2 e a pior foi em Aust 99P1. Embora não exista diferença na produção total de biomassa entre os acessos, as relações de LF/C e de MV/MM permitem diferenciar os acessos, com destaque para Aust 103. [Structural characterization of Urochloa mosambicensis accesses]. Abstract: In order to improve forage production in the semiarid region are being introduced in several species of grasses, in order to increase animal production rates and diversification of forage. The objective of the related work provide information on structural characteristics of grass-current. The experiment was conducted in the greenhouse at Embrapa Goats and Sheep in Sobral, CE. The monitoring of leaf development dynamics occurred in the period March-April 2014, according to the methodology of marked tillers. The design was completely randomized with 12 treatments and two replications. Biomass estimation was performed by destructive collection after 30 days. There was no significant difference for most biomass components. The variable that showed statistical difference was the LF / C. For the vegetative component the best LF / C was in Aust 101P1 and 102P2 Aust and the worst was in Aust 99P1. Although there is no difference in biomass production among accessions, the sheet of relations: stem and living materials and dead material allow differentiation of access, especially Aust 103. MenosResumo: Com o intuito de melhorar a produção de forragem no semiárido estão sendo introduzidas na região várias espécies de gramíneas, com a finalidade de aumentar os índices de produção animal e diversificação de forragem. Objetivou-se com o referente trabalho fornecer informações sobre características estruturais do capim-corrente. O experimento foi conduzido na casa de vegetação da Embrapa Caprinos e Ovinos, em Sobral, CE. O acompanhamento da dinâmica de desenvolvimento foliar ocorreu no período de março a abril de 2014, obedecendo à metodologia dos perfilhos marcados. O delineamento utilizado foi inteiramente casualizado, com 12 tratamentos e duas repetições. Foi realizada estimativa de biomassa por coleta destrutiva aos 30 dias. Não houve diferença significativa para a maioria dos componentes da biomassa. A variável que apresentou diferença estatística foi a relação LF/C. Para o componente vegetativo a melhor relação LF/C foi em Aust 101P1 e Aust 102P2 e a pior foi em Aust 99P1. Embora não exista diferença na produção total de biomassa entre os acessos, as relações de LF/C e de MV/MM permitem diferenciar os acessos, com destaque para Aust 103. [Structural characterization of Urochloa mosambicensis accesses]. Abstract: In order to improve forage production in the semiarid region are being introduced in several species of grasses, in order to increase animal production rates and diversification of forage. The objective of the related work provide information on structural... Mostrar Tudo |
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Palavras-Chave: |
Capim corrente; Capim Urocloa; Fase reprodutiva; Fase vegetativa; Feed crops; Feed grasses; Reproductive stage; Vegetative stage. |
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Thesagro: |
Biomassa; Gramínea forrageira; Urochloa mosambicensis. |
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Thesaurus Nal: |
Biomass. |
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Categoria do assunto: |
F Plantas e Produtos de Origem Vegetal |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/138843/1/cnpc-2015-Avaliacao-de-caracteristicas.pdf
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Marc: |
LEADER 03453nam a2200325 a 4500
001 2036744
005 2022-05-17
008 2015 bl uuuu u00u1 u #d
100 1 $aALVES, M. M. de A.
245 $aAvaliação de características estruturais de acessos de Urochloa mosambicensis.$h[electronic resource]
260 $aIn: CONGRESSO BRASILEIRO DE ZOOTECNIA, 25., 2015, Fortaleza. Dimensões tecnológicas e sociais da zootecnia: anais. Fortaleza: Sociedade Brasileira de Zootecnia, 2015. 3 f.$c2015
520 $aResumo: Com o intuito de melhorar a produção de forragem no semiárido estão sendo introduzidas na região várias espécies de gramíneas, com a finalidade de aumentar os índices de produção animal e diversificação de forragem. Objetivou-se com o referente trabalho fornecer informações sobre características estruturais do capim-corrente. O experimento foi conduzido na casa de vegetação da Embrapa Caprinos e Ovinos, em Sobral, CE. O acompanhamento da dinâmica de desenvolvimento foliar ocorreu no período de março a abril de 2014, obedecendo à metodologia dos perfilhos marcados. O delineamento utilizado foi inteiramente casualizado, com 12 tratamentos e duas repetições. Foi realizada estimativa de biomassa por coleta destrutiva aos 30 dias. Não houve diferença significativa para a maioria dos componentes da biomassa. A variável que apresentou diferença estatística foi a relação LF/C. Para o componente vegetativo a melhor relação LF/C foi em Aust 101P1 e Aust 102P2 e a pior foi em Aust 99P1. Embora não exista diferença na produção total de biomassa entre os acessos, as relações de LF/C e de MV/MM permitem diferenciar os acessos, com destaque para Aust 103. [Structural characterization of Urochloa mosambicensis accesses]. Abstract: In order to improve forage production in the semiarid region are being introduced in several species of grasses, in order to increase animal production rates and diversification of forage. The objective of the related work provide information on structural characteristics of grass-current. The experiment was conducted in the greenhouse at Embrapa Goats and Sheep in Sobral, CE. The monitoring of leaf development dynamics occurred in the period March-April 2014, according to the methodology of marked tillers. The design was completely randomized with 12 treatments and two replications. Biomass estimation was performed by destructive collection after 30 days. There was no significant difference for most biomass components. The variable that showed statistical difference was the LF / C. For the vegetative component the best LF / C was in Aust 101P1 and 102P2 Aust and the worst was in Aust 99P1. Although there is no difference in biomass production among accessions, the sheet of relations: stem and living materials and dead material allow differentiation of access, especially Aust 103.
650 $aBiomass
650 $aBiomassa
650 $aGramínea forrageira
650 $aUrochloa mosambicensis
653 $aCapim corrente
653 $aCapim Urocloa
653 $aFase reprodutiva
653 $aFase vegetativa
653 $aFeed crops
653 $aFeed grasses
653 $aReproductive stage
653 $aVegetative stage
700 1 $aCÂNDIDO, M. J. D.
700 1 $aROCHA, J. E. da S.
700 1 $aCAVALCANTE, A. C. R.
700 1 $aBUENO, L. G.
700 1 $aSANTOS, F. G. R. dos
700 1 $aOLIVEIRA, L. B. de
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Embrapa Caprinos e Ovinos (CNPC) |
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Registro Completo
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Biblioteca(s): |
Embrapa Caprinos e Ovinos. |
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Data corrente: |
06/09/2001 |
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Data da última atualização: |
31/10/2019 |
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Autoria: |
ARAUJO, M. R. A. de. |
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Afiliação: |
MARCELO RENATO ALVES DE ARAUJO, CNPC. |
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Título: |
Variation and heritability in meadow bromegrass (Bromus riparius Rehm.). |
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Ano de publicação: |
2001 |
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Fonte/Imprenta: |
2001. |
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Páginas: |
157p. |
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Idioma: |
Inglês |
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Notas: |
Thesis (Doctor of Philosophy) - University of Saskatchewan, Saskatoon, Canada. |
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Conteúdo: |
Meadow bromegrass (Bromus riparius Rehm.) is a recently introduced pasture grass in western Canada. Its leafy production and rapid regrowth have made it the most widely used grass species for pasturing beef animals in this region. As relatively little breeding work has been done on this species, there is little information on its breeding behaviour. The main objective of this study was to estimate genetic parameters and assess breeding methodologies for meadow bromegrass. Forty-four meadow bromegrass genotypes from the three available cultivars and forty half-sib (polycross (PX) and open-pollinated (OP)) and selfed (S1) progenies were evaluated for morphological and agronomic characters, and molecular (RAPD) markers. Genetic variation for total biological yield, head weight, seed yield, harvest index, height, growth habit, spread, and volume was significant in the OP and S1 tests. Genetic variation estimates for dry matter yield were negative (PX), not significant (OP), or moderate (S1). Estimated geneticvariation for quality traits and those characters which were visually evaluated was not significant, except for growth habit (OP and S1) and acid-detergent fiber (ADF) (S1). Among progeny lines, RAPD marker variation found in the half-sib progenies accounted for about 15% of the total variation. In the S1 test the variation among progeny lines was twice that of the half-sib progenies. Correlations between the different characters demonstrated that is possible to simultaneously improve both seed and forage yield. Since leafiness was found to be correlated with dry matter yield but not with seed yield it may be possible to simultaneously improve all three characters. Rankings of progenies by the half-sib tests for forage and seed yield were not changed by the use of the synthetic parental value (SVi) which includes information from selfed progeny. The PX progeny test did not discriminate parents as well as the OP and S1 tests, which may be due to non-random pollination in the polycross. The S1 progeny test showed the highest predicted response to selection, followed by the OP test. Heritability estimates from the OP and S1 tests for total biological yield, seed yield, harvest index, and height, were similar to those found in the clonal evaluation test. Therefore, a clonal evaluation test will provide sufficient information to choose parents for breeding an improved synthetic cultivar for these characters. Observed dissimilarity of ranking of progeny lines over progeny tests for some traits (head weight, seed yield, and harvest index) was due to discrepancies between the PX and OP tests. No differences in progeny line ranking among the progeny tests were observed for all other traits. Analysis of variance on marker frequency means showed that interaction between genotypes and progeny lines was also not significant. MenosMeadow bromegrass (Bromus riparius Rehm.) is a recently introduced pasture grass in western Canada. Its leafy production and rapid regrowth have made it the most widely used grass species for pasturing beef animals in this region. As relatively little breeding work has been done on this species, there is little information on its breeding behaviour. The main objective of this study was to estimate genetic parameters and assess breeding methodologies for meadow bromegrass. Forty-four meadow bromegrass genotypes from the three available cultivars and forty half-sib (polycross (PX) and open-pollinated (OP)) and selfed (S1) progenies were evaluated for morphological and agronomic characters, and molecular (RAPD) markers. Genetic variation for total biological yield, head weight, seed yield, harvest index, height, growth habit, spread, and volume was significant in the OP and S1 tests. Genetic variation estimates for dry matter yield were negative (PX), not significant (OP), or moderate (S1). Estimated geneticvariation for quality traits and those characters which were visually evaluated was not significant, except for growth habit (OP and S1) and acid-detergent fiber (ADF) (S1). Among progeny lines, RAPD marker variation found in the half-sib progenies accounted for about 15% of the total variation. In the S1 test the variation among progeny lines was twice that of the half-sib progenies. Correlations between the different characters demonstrated that is possible to simultaneous... Mostrar Tudo |
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Palavras-Chave: |
Genetic parameters; Genetica quantitativa. |
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Thesagro: |
Genética Molecular; Marcador Molecular; Pastagem. |
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Thesaurus NAL: |
Bromus riparius; Forage grasses; Grasses; Pasture plants. |
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Categoria do assunto: |
G Melhoramento Genético |
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Marc: |
LEADER 03559nam a2200241 a 4500
001 1516291
005 2019-10-31
008 2001 bl uuuu m 00u1 u #d
100 1 $aARAUJO, M. R. A. de
245 $aVariation and heritability in meadow bromegrass (Bromus riparius Rehm.).
260 $a2001.$c2001
300 $a157p.
500 $aThesis (Doctor of Philosophy) - University of Saskatchewan, Saskatoon, Canada.
520 $aMeadow bromegrass (Bromus riparius Rehm.) is a recently introduced pasture grass in western Canada. Its leafy production and rapid regrowth have made it the most widely used grass species for pasturing beef animals in this region. As relatively little breeding work has been done on this species, there is little information on its breeding behaviour. The main objective of this study was to estimate genetic parameters and assess breeding methodologies for meadow bromegrass. Forty-four meadow bromegrass genotypes from the three available cultivars and forty half-sib (polycross (PX) and open-pollinated (OP)) and selfed (S1) progenies were evaluated for morphological and agronomic characters, and molecular (RAPD) markers. Genetic variation for total biological yield, head weight, seed yield, harvest index, height, growth habit, spread, and volume was significant in the OP and S1 tests. Genetic variation estimates for dry matter yield were negative (PX), not significant (OP), or moderate (S1). Estimated geneticvariation for quality traits and those characters which were visually evaluated was not significant, except for growth habit (OP and S1) and acid-detergent fiber (ADF) (S1). Among progeny lines, RAPD marker variation found in the half-sib progenies accounted for about 15% of the total variation. In the S1 test the variation among progeny lines was twice that of the half-sib progenies. Correlations between the different characters demonstrated that is possible to simultaneously improve both seed and forage yield. Since leafiness was found to be correlated with dry matter yield but not with seed yield it may be possible to simultaneously improve all three characters. Rankings of progenies by the half-sib tests for forage and seed yield were not changed by the use of the synthetic parental value (SVi) which includes information from selfed progeny. The PX progeny test did not discriminate parents as well as the OP and S1 tests, which may be due to non-random pollination in the polycross. The S1 progeny test showed the highest predicted response to selection, followed by the OP test. Heritability estimates from the OP and S1 tests for total biological yield, seed yield, harvest index, and height, were similar to those found in the clonal evaluation test. Therefore, a clonal evaluation test will provide sufficient information to choose parents for breeding an improved synthetic cultivar for these characters. Observed dissimilarity of ranking of progeny lines over progeny tests for some traits (head weight, seed yield, and harvest index) was due to discrepancies between the PX and OP tests. No differences in progeny line ranking among the progeny tests were observed for all other traits. Analysis of variance on marker frequency means showed that interaction between genotypes and progeny lines was also not significant.
650 $aBromus riparius
650 $aForage grasses
650 $aGrasses
650 $aPasture plants
650 $aGenética Molecular
650 $aMarcador Molecular
650 $aPastagem
653 $aGenetic parameters
653 $aGenetica quantitativa
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