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Registro Completo |
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Biblioteca(s): |
Embrapa Amazônia Oriental. |
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Data corrente: |
14/05/1996 |
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Data da última atualização: |
15/03/2006 |
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Autoria: |
GILL, S. S. |
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Título: |
Summer feeding of dairy cows. |
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Ano de publicação: |
1968 |
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Fonte/Imprenta: |
[S.l.]: The Ohio State University, 1968. |
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Páginas: |
129p. |
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Idioma: |
Inglês |
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Notas: |
Ph.D. Dissertation. |
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Conteúdo: |
To answer the above question the present studies were directed at: 1. Determining efficiency of conversion of protein in forages to milk proteins in cows grazed for short periods and fed for maximun milk production. 2. Studying the effect of the methods of handling and feeding recommended forage crops upon the level and efficiency of milk production and productivity of forage producing land. 3. Measuring the presinstency of the forage species managed under rotational-strip grazing system. 4. Conducting digestion trials to measure the value of green forage as well as stored forage. 5. Developing grazing/feeding systems adaptable to conditions of increasing herd size and increasing productivity of dairy cows. |
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Palavras-Chave: |
Bovino de leite; Feed. |
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Thesagro: |
Alimentação; Animal. |
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Thesaurus Nal: |
dairy cattle. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 01178nam a2200193 a 4500
001 1401447
005 2006-03-15
008 1968 bl uuuu m 00u1 u #d
100 1 $aGILL, S. S.
245 $aSummer feeding of dairy cows.
260 $a[S.l.]: The Ohio State University$c1968
300 $a129p.
500 $aPh.D. Dissertation.
520 $aTo answer the above question the present studies were directed at: 1. Determining efficiency of conversion of protein in forages to milk proteins in cows grazed for short periods and fed for maximun milk production. 2. Studying the effect of the methods of handling and feeding recommended forage crops upon the level and efficiency of milk production and productivity of forage producing land. 3. Measuring the presinstency of the forage species managed under rotational-strip grazing system. 4. Conducting digestion trials to measure the value of green forage as well as stored forage. 5. Developing grazing/feeding systems adaptable to conditions of increasing herd size and increasing productivity of dairy cows.
650 $adairy cattle
650 $aAlimentação
650 $aAnimal
653 $aBovino de leite
653 $aFeed
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Registro original: |
Embrapa Amazônia Oriental (CPATU) |
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Registro Completo
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Biblioteca(s): |
Embrapa Gado de Leite. |
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Data corrente: |
10/02/2014 |
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Data da última atualização: |
05/02/2024 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
A - 2 |
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Autoria: |
NUNES, J. D.; AZEVEDO, A. L. S.; PEREIRA, A. V.; PAULA, C. M. P.; CAMPOS, J. M. S.; LEDO, F. J. da S.; SANTOS, V. B. |
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Afiliação: |
J. D. NUNES; ANA LUISA SOUSA AZEVEDO, CNPGL; ANTONIO VANDER PEREIRA, CNPGL; C.M.P. PAULA, UFLA; J. M. S. CAMPOS, UFJF; FRANCISCO JOSE DA SILVA LEDO, CNPGL; V. B. SANTOS, Universidade Federal do Acre. |
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Título: |
DNA elimination in embryogenic development of Pennisetum glaucum x Pennisetum purpureum (Poaceae) hybrids. |
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Ano de publicação: |
2013 |
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Fonte/Imprenta: |
Genetics and Molecular Research, v. 12, n. 4, p. 4817-4826, 2013. |
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DOI: |
https://doi.org/10.4238/2013.october.22.1 |
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Idioma: |
Inglês |
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Conteúdo: |
Interspecific hybridization between Napier grass (Pennisetum purpureum), which is widely grown in Brazil for cattle forage, and pearl millet (Pennisetum glaucum) has been used as a breeding strategy for the development of improved cultivars. However, the hybrid between these two species is sterile due to its triploid condition (2n = 3x = 21 chromosomes), which hinders its use in crop breeding programs. It is known that genomic alterations result from the hybridization process. In order to measure the loss of DNA during embryo development, we used flow cytometry to estimate the nuclear DNA content of triploid and tetraploid embryos produced by interspecific hybridization between Napier grass and pearl millet. The triploid and tetraploid hybrids had a mean DNA content of 4.99-4.87 and 5.25-4.84 pg, at 10 and 30 days after pollination, respectively. The mean reduction in DNA content was higher in the tetraploid hybrids. The flow cytometry results revealed progressive genomic instability in these triploid and tetraploid hybrids, with this instability causing significant alterations in the DNA content of the hybrids. |
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Palavras-Chave: |
Elephant grass. |
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Thesaurus NAL: |
flow cytometry; grasses; hybridization. |
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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/96852/1/ARTIGO-Ledo.pdf
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Marc: |
LEADER 01919naa a2200253 a 4500
001 1979289
005 2024-02-05
008 2013 bl uuuu u00u1 u #d
024 7 $ahttps://doi.org/10.4238/2013.october.22.1$2DOI
100 1 $aNUNES, J. D.
245 $aDNA elimination in embryogenic development of Pennisetum glaucum x Pennisetum purpureum (Poaceae) hybrids.$h[electronic resource]
260 $c2013
520 $aInterspecific hybridization between Napier grass (Pennisetum purpureum), which is widely grown in Brazil for cattle forage, and pearl millet (Pennisetum glaucum) has been used as a breeding strategy for the development of improved cultivars. However, the hybrid between these two species is sterile due to its triploid condition (2n = 3x = 21 chromosomes), which hinders its use in crop breeding programs. It is known that genomic alterations result from the hybridization process. In order to measure the loss of DNA during embryo development, we used flow cytometry to estimate the nuclear DNA content of triploid and tetraploid embryos produced by interspecific hybridization between Napier grass and pearl millet. The triploid and tetraploid hybrids had a mean DNA content of 4.99-4.87 and 5.25-4.84 pg, at 10 and 30 days after pollination, respectively. The mean reduction in DNA content was higher in the tetraploid hybrids. The flow cytometry results revealed progressive genomic instability in these triploid and tetraploid hybrids, with this instability causing significant alterations in the DNA content of the hybrids.
650 $aflow cytometry
650 $agrasses
650 $ahybridization
653 $aElephant grass
700 1 $aAZEVEDO, A. L. S.
700 1 $aPEREIRA, A. V.
700 1 $aPAULA, C. M. P.
700 1 $aCAMPOS, J. M. S.
700 1 $aLEDO, F. J. da S.
700 1 $aSANTOS, V. B.
773 $tGenetics and Molecular Research$gv. 12, n. 4, p. 4817-4826, 2013.
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Registro original: |
Embrapa Gado de Leite (CNPGL) |
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