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Registro Completo |
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Biblioteca(s): |
Embrapa Gado de Corte. |
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Data corrente: |
02/05/2002 |
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Data da última atualização: |
21/07/2011 |
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Autoria: |
JANK, L. |
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Afiliação: |
LIANA JANK, CNPGC. |
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Título: |
Section for enhanced agronomic attributions in Setaria Sphacelata (Schumacher) Moss. |
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Ano de publicação: |
2001 |
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Fonte/Imprenta: |
2001. |
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Idioma: |
Inglês |
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Notas: |
Tese (Doutorado), University of Florida. |
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Conteúdo: |
There is a demand for a wider range of adapted, improved warm-season grasses in Florida because the cool winters affect the productin and persistence of many existing cultivars. A breeding program was conducted in Florida to study the breeding potential and adapttion of the tropical forage grass Setaria sphacelata (Schumacher) moss to these conditions. Eight populations were developed from 1997 to 1999 using half-sib family selection methodology. Six of the populations were developed in Gainesville, one in Ona and one in Quincy. In 1999 and 2000, these populations were compared in two wide-spaced an two close-spaced experiments in Gainesville. The methodology of halfsib family selection using detached culms for intermating selected populations in isolation was useful for setaria breeding, because it allowed completion of one cycle of selection per year, it maintained variability and it avoidd inbreedin. Results of population comparisons showed that selection for leaf width ws successful. The width of leaves, leaf percentage, leaf: stem ratio, and whole-plant crude protein (CP) concentration were increased, while leaf dry mattr yield, in vitro organic matter digestibility (IVOMD) and other measured morphological characteristics were unchanged. Stem and total dry matter yields were decreased. Selection for head number did noto significantly increase the number of heads and decreased plant height, leaf width, inflorescence lenght, total, leaf and stem dry matter yield, leaf percentage and leaf: stem ratio in one or both cycle. Seed production, CP and IVOMD were not affected. Selection for regrowth after grazing reduced plant height, inflorescence lengh and seed production. Selkction for frost tolerance was successful in enhancing winter survival at Gainesville and rduced canopy and inflorescence height and leaf dry matter yield in one or two cycles. It did not affect leaf width, inflrescence lenght, head number, total or stem dry matter production or leaf: stem ratio. The germplasm of S. sphacelata was plastic enough that changes in morphological and agronomic traits due to selection and breeding were achived. Setaria has promise for use as a forage plant in Florida, but concerns regarding pest susceptibility and winter persistence remain to be resolved before this species may be commercialized in the state. MenosThere is a demand for a wider range of adapted, improved warm-season grasses in Florida because the cool winters affect the productin and persistence of many existing cultivars. A breeding program was conducted in Florida to study the breeding potential and adapttion of the tropical forage grass Setaria sphacelata (Schumacher) moss to these conditions. Eight populations were developed from 1997 to 1999 using half-sib family selection methodology. Six of the populations were developed in Gainesville, one in Ona and one in Quincy. In 1999 and 2000, these populations were compared in two wide-spaced an two close-spaced experiments in Gainesville. The methodology of halfsib family selection using detached culms for intermating selected populations in isolation was useful for setaria breeding, because it allowed completion of one cycle of selection per year, it maintained variability and it avoidd inbreedin. Results of population comparisons showed that selection for leaf width ws successful. The width of leaves, leaf percentage, leaf: stem ratio, and whole-plant crude protein (CP) concentration were increased, while leaf dry mattr yield, in vitro organic matter digestibility (IVOMD) and other measured morphological characteristics were unchanged. Stem and total dry matter yields were decreased. Selection for head number did noto significantly increase the number of heads and decreased plant height, leaf width, inflorescence lenght, total, leaf and stem dry matter yield, le... Mostrar Tudo |
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Palavras-Chave: |
Adaptação; Adaptation; Estados Unidos; Selection. |
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Thesagro: |
Gramineae; Melhoramento Genético Vegetal; Pastagem; Seleção. |
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Thesaurus Nal: |
Florida; pastures; plant breeding. |
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Categoria do assunto: |
K Ciência Florestal e Produtos de Origem Vegetal |
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Marc: |
LEADER 03025nam a2200253 a 4500
001 1317408
005 2011-07-21
008 2001 bl uuuu m 00u1 u #d
100 1 $aJANK, L.
245 $aSection for enhanced agronomic attributions in Setaria Sphacelata (Schumacher) Moss.
260 $a2001.$c2001
500 $aTese (Doutorado), University of Florida.
520 $aThere is a demand for a wider range of adapted, improved warm-season grasses in Florida because the cool winters affect the productin and persistence of many existing cultivars. A breeding program was conducted in Florida to study the breeding potential and adapttion of the tropical forage grass Setaria sphacelata (Schumacher) moss to these conditions. Eight populations were developed from 1997 to 1999 using half-sib family selection methodology. Six of the populations were developed in Gainesville, one in Ona and one in Quincy. In 1999 and 2000, these populations were compared in two wide-spaced an two close-spaced experiments in Gainesville. The methodology of halfsib family selection using detached culms for intermating selected populations in isolation was useful for setaria breeding, because it allowed completion of one cycle of selection per year, it maintained variability and it avoidd inbreedin. Results of population comparisons showed that selection for leaf width ws successful. The width of leaves, leaf percentage, leaf: stem ratio, and whole-plant crude protein (CP) concentration were increased, while leaf dry mattr yield, in vitro organic matter digestibility (IVOMD) and other measured morphological characteristics were unchanged. Stem and total dry matter yields were decreased. Selection for head number did noto significantly increase the number of heads and decreased plant height, leaf width, inflorescence lenght, total, leaf and stem dry matter yield, leaf percentage and leaf: stem ratio in one or both cycle. Seed production, CP and IVOMD were not affected. Selection for regrowth after grazing reduced plant height, inflorescence lengh and seed production. Selkction for frost tolerance was successful in enhancing winter survival at Gainesville and rduced canopy and inflorescence height and leaf dry matter yield in one or two cycles. It did not affect leaf width, inflrescence lenght, head number, total or stem dry matter production or leaf: stem ratio. The germplasm of S. sphacelata was plastic enough that changes in morphological and agronomic traits due to selection and breeding were achived. Setaria has promise for use as a forage plant in Florida, but concerns regarding pest susceptibility and winter persistence remain to be resolved before this species may be commercialized in the state.
650 $aFlorida
650 $apastures
650 $aplant breeding
650 $aGramineae
650 $aMelhoramento Genético Vegetal
650 $aPastagem
650 $aSeleção
653 $aAdaptação
653 $aAdaptation
653 $aEstados Unidos
653 $aSelection
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Registro original: |
Embrapa Gado de Corte (CNPGC) |
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Biblioteca |
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Origem |
Tipo/Formato |
Classificação |
Cutter |
Registro |
Volume |
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URL |
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Registro Completo
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Biblioteca(s): |
Embrapa Amazônia Oriental. |
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Data corrente: |
26/10/2016 |
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Data da última atualização: |
31/05/2017 |
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Tipo da produção científica: |
Capítulo em Livro Técnico-Científico |
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Autoria: |
RODRIGUES, S. de M.; CUNHA, E. F. M.; OLIVEIRA, M. do S. P. de. |
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Afiliação: |
SIMONE DE MIRANDA RODRIGUES, CPATU; ELISA FERREIRA MOURA CUNHA, CPATU; MARIA DO SOCORRO P DE OLIVEIRA, CPATU. |
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Título: |
Aplicações de marcadores moleculares em Byrsonima crassifolia. |
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Ano de publicação: |
2016 |
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Fonte/Imprenta: |
In: GURGEL, F. de L. (Ed.). O murucizeiro [Byrsonima crassifolia (L.) H.B.K.]: avanços no conhecimento e ações de pré-melhoramento. Belém, PA: Embrapa Amazônia Oriental, 2016. |
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Páginas: |
cap. 3, p. 41-50 |
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ISBN: |
978-85-7035-633-8 |
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Idioma: |
Português |
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Conteúdo: |
O uso de marcadores moleculares em espécies vegetais pode auxiliar no estudo da diversidade genética ao verificar a forma de distribuição da variação genética entre e dentro de populações naturais e os locais de maior ocorrência de variação. Também pode contribuir para inferir acerca da forma de reprodução das espécies. Os marcadores podem indicar locais no quais está ocorrendo maior incidência de cruzamentos entre aparentados, taxas de fluxo gênico entre as populações e relações entre os componentes da população. Além disso, auxiliam no melhoramento genético ao determinar a variação existente nas coleções/bancos de germoplasma, no direcionamento de cruzamentos, em testes de paternidade, verificação de métodos que geram variabilidade, seleção assistida por marcadores e obtenção de marcas que possam descrever clones/variedades/cultivares recomendadas. Dessa forma, o uso de marcadores moleculares em Byrsonima crassifolia pode contribuir em diversos aspectos. |
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Palavras-Chave: |
Byrsonina crassifolia; Marcadores moleculares. |
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Thesagro: |
Melhoramento genético vegetal. |
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Categoria do assunto: |
G Melhoramento Genético |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/149351/1/Muruci-cap3.pdf
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Marc: |
LEADER 01747naa a2200205 a 4500
001 2055432
005 2017-05-31
008 2016 bl uuuu u00u1 u #d
020 $a978-85-7035-633-8
100 1 $aRODRIGUES, S. de M.
245 $aAplicações de marcadores moleculares em Byrsonima crassifolia.
260 $c2016
300 $acap. 3, p. 41-50
520 $aO uso de marcadores moleculares em espécies vegetais pode auxiliar no estudo da diversidade genética ao verificar a forma de distribuição da variação genética entre e dentro de populações naturais e os locais de maior ocorrência de variação. Também pode contribuir para inferir acerca da forma de reprodução das espécies. Os marcadores podem indicar locais no quais está ocorrendo maior incidência de cruzamentos entre aparentados, taxas de fluxo gênico entre as populações e relações entre os componentes da população. Além disso, auxiliam no melhoramento genético ao determinar a variação existente nas coleções/bancos de germoplasma, no direcionamento de cruzamentos, em testes de paternidade, verificação de métodos que geram variabilidade, seleção assistida por marcadores e obtenção de marcas que possam descrever clones/variedades/cultivares recomendadas. Dessa forma, o uso de marcadores moleculares em Byrsonima crassifolia pode contribuir em diversos aspectos.
650 $aMelhoramento genético vegetal
653 $aByrsonina crassifolia
653 $aMarcadores moleculares
700 1 $aCUNHA, E. F. M.
700 1 $aOLIVEIRA, M. do S. P. de
773 $tIn: GURGEL, F. de L. (Ed.). O murucizeiro [Byrsonima crassifolia (L.) H.B.K.]: avanços no conhecimento e ações de pré-melhoramento. Belém, PA: Embrapa Amazônia Oriental, 2016.
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