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Registro Completo |
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Biblioteca(s): |
Embrapa Cerrados; Embrapa Gado de Corte; Embrapa Unidades Centrais. |
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Data corrente: |
13/07/2007 |
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Data da última atualização: |
21/10/2009 |
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Autoria: |
KARIA, C. T.; DUARTE, J. B.; ARAÚJO, A. C. G. de. |
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Título: |
Desenvolvimento de cultivares do gênero Brachiaria (trin.) Griseb no Brasil. |
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Ano de publicação: |
2006 |
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Fonte/Imprenta: |
Planaltina, DF: Embrapa Cerrados, 2006. |
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Páginas: |
57 p. |
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Série: |
(Embrapa Cerrados. Documentos, 163). |
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Idioma: |
Português |
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Conteúdo: |
In Brazil, cultivated pastures cover more than 100 million hectares and Brachiaria species cover more than 45 million hectares. B. brizantha cv. Marandu and B. decumbens cv. Basilisk are the primary cultivars. The large areas occupied by the same cultivars pose a vulnerability to the beef cattle activity, and make clear how necessary is to increase the genetic diversity of forage cultivars. Most of Brachiaria species show the apomitic mode of reproduction, with seeds containing an embryo with assexual origin. The apomixis limits the use of the hybridization in the genetic breeding program. However, the induced duplication of the chromosomes of the sexual diploid B. ruziziensis, and the identification of sexual diploid B. brizantha and B. decumbens genotypes enabled the use of intra and interspecific genetic recombination for the improvement of these species. In this review, it is presented a historical briefing about Brachiaria cultivars developed by Embrapa, the description of some aspects on the genetics of Brachiaria, some strategies adopted by this breeding program, and the related researches that have been performed in Brazil. |
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Palavras-Chave: |
Braquiária; Brasil; Feed crops; Feed grasses; Hibridization. |
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Thesagro: |
Apomixia; Brachiaria; Capim Brachiaria; Citogenética Vegetal; Germoplasma; Gramínea Forrageira; Hibridação; Historia; Melhoramento Genético Vegetal; Pastagem; Pesquisa; Planta Forrageira; Reprodução; Variedade. |
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Thesaurus Nal: |
apomixis; Brazil; cytogenetics; germplasm; history; pastures; plant breeding; reproduction; research; varieties. |
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Categoria do assunto: |
-- |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/CPAC-2009/27809/1/doc_163.pdf
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Marc: |
LEADER 02436nam a2200505 a 4500
001 1570263
005 2009-10-21
008 2006 bl uuuu 00u1 u #d
100 1 $aKARIA, C. T.
245 $aDesenvolvimento de cultivares do gênero Brachiaria (trin.) Griseb no Brasil.
260 $aPlanaltina, DF: Embrapa Cerrados$c2006
300 $a57 p.
490 $a(Embrapa Cerrados. Documentos, 163).
520 $aIn Brazil, cultivated pastures cover more than 100 million hectares and Brachiaria species cover more than 45 million hectares. B. brizantha cv. Marandu and B. decumbens cv. Basilisk are the primary cultivars. The large areas occupied by the same cultivars pose a vulnerability to the beef cattle activity, and make clear how necessary is to increase the genetic diversity of forage cultivars. Most of Brachiaria species show the apomitic mode of reproduction, with seeds containing an embryo with assexual origin. The apomixis limits the use of the hybridization in the genetic breeding program. However, the induced duplication of the chromosomes of the sexual diploid B. ruziziensis, and the identification of sexual diploid B. brizantha and B. decumbens genotypes enabled the use of intra and interspecific genetic recombination for the improvement of these species. In this review, it is presented a historical briefing about Brachiaria cultivars developed by Embrapa, the description of some aspects on the genetics of Brachiaria, some strategies adopted by this breeding program, and the related researches that have been performed in Brazil.
650 $aapomixis
650 $aBrazil
650 $acytogenetics
650 $agermplasm
650 $ahistory
650 $apastures
650 $aplant breeding
650 $areproduction
650 $aresearch
650 $avarieties
650 $aApomixia
650 $aBrachiaria
650 $aCapim Brachiaria
650 $aCitogenética Vegetal
650 $aGermoplasma
650 $aGramínea Forrageira
650 $aHibridação
650 $aHistoria
650 $aMelhoramento Genético Vegetal
650 $aPastagem
650 $aPesquisa
650 $aPlanta Forrageira
650 $aReprodução
650 $aVariedade
653 $aBraquiária
653 $aBrasil
653 $aFeed crops
653 $aFeed grasses
653 $aHibridization
700 1 $aDUARTE, J. B.
700 1 $aARAÚJO, A. C. G. de
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Registro original: |
Embrapa Cerrados (CPAC) |
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Origem |
Tipo/Formato |
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Registro |
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Registro Completo
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Biblioteca(s): |
Embrapa Gado de Leite. |
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Data corrente: |
18/03/2011 |
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Data da última atualização: |
15/02/2024 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
B - 1 |
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Autoria: |
NASCIMENTO, C. S. do; MACHADO, M. A.; GUIMARÃES, S. E. F.; GUIMARAES, M. F. M.; PEIXOTO, J. O.; FURLONG, J.; PRATA, M. C. de A.; VERNEQUE, R. da S.; TEODORO, R. L.; LOPES, P. S. |
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Afiliação: |
CARLOS SOUZA DO NASCIMENTO, UFV; MARCO ANTONIO MACHADO, CNPGL; SIMONE ELIZA FACIONI GUIMARÃES, UFV; MARTA FONSECA MARTINS GUIMARAES, CNPGL; J. OLIVEIRA PEIXOTO, UFV; JOHN FURLONG, CNPGL; MARCIA CRISTINA DE AZEVEDO PRATA, CNPGL; RUI DA SILVA VERNEQUE, CNPGL; ROBERTO LUIZ TEODORO, Pesquisador aposentado do CNPGL; PAULO SAVIO LOPES, UFV. |
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Título: |
Differential expression of genes in resistant versus susceptible Gyr x Holstein cattle challenged with the tick Rhipicephalus (Boophilus) microplus. |
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Ano de publicação: |
2010 |
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Fonte/Imprenta: |
Genetics and Molecular Research, v. 9, n. 4, p. 1974-1979, 2010. |
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DOI: |
https://doi.org/10.4238/vol9-4gmr905 |
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Idioma: |
Inglês |
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Conteúdo: |
The bovine tick Rhipicephalus (Boophilus) microplus causes major losses in cattle production systems in tropical regions. Bos indicus breeds are more resistant to ticks than B. taurus breeds. Resistance genes could be an alternative to control this parasite. We examined the pattern of gene expression of three calcium-binding-protein genes: translationally controlled tumor protein 1 (TPT1), allergen Bos d3 (S100A7), calcium channel protein transient receptor potential vanilloid 6 (TRPV6), and the cysteine proteinase inhibitor gene (CST6). These genes were selected from cDNA libraries prepared from skin biopsies taken from resistant and susceptible Gyr x Holstein F₂ animals. These biopsies were also used to study the expression level of these genes through real-time PCR analysis. The relative expression levels of the S100A7, TPT1, TRPV6, and CST6 genes were 2.01 ± 0.6, 1.32 ± 0.9, 1.53 ± 1.2, and 2.03 ± 0.7 times higher in the susceptible group, respectively. Skin lesion tissue from the susceptible animals showed significantly more mRNA transcripts of these genes in comparison with the resistant animals (P = 0.001). However, this hypersensitivity does not seem to protect the susceptible animals against tick infestation. |
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Palavras-Chave: |
CST6; QRT-PCR; S100A7; Tick resistance; TPT1; TRPV6. |
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Categoria do assunto: |
G Melhoramento Genético |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/doc/881545/1/Differential-expression-of-genes-in-resistant-versus-susceptible-Gyr-x-Holstein-cattle.pdf
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Marc: |
LEADER 02203naa a2200313 a 4500
001 1881545
005 2024-02-15
008 2010 bl uuuu u00u1 u #d
024 7 $ahttps://doi.org/10.4238/vol9-4gmr905$2DOI
100 1 $aNASCIMENTO, C. S. do
245 $aDifferential expression of genes in resistant versus susceptible Gyr x Holstein cattle challenged with the tick Rhipicephalus (Boophilus) microplus.$h[electronic resource]
260 $c2010
520 $aThe bovine tick Rhipicephalus (Boophilus) microplus causes major losses in cattle production systems in tropical regions. Bos indicus breeds are more resistant to ticks than B. taurus breeds. Resistance genes could be an alternative to control this parasite. We examined the pattern of gene expression of three calcium-binding-protein genes: translationally controlled tumor protein 1 (TPT1), allergen Bos d3 (S100A7), calcium channel protein transient receptor potential vanilloid 6 (TRPV6), and the cysteine proteinase inhibitor gene (CST6). These genes were selected from cDNA libraries prepared from skin biopsies taken from resistant and susceptible Gyr x Holstein F₂ animals. These biopsies were also used to study the expression level of these genes through real-time PCR analysis. The relative expression levels of the S100A7, TPT1, TRPV6, and CST6 genes were 2.01 ± 0.6, 1.32 ± 0.9, 1.53 ± 1.2, and 2.03 ± 0.7 times higher in the susceptible group, respectively. Skin lesion tissue from the susceptible animals showed significantly more mRNA transcripts of these genes in comparison with the resistant animals (P = 0.001). However, this hypersensitivity does not seem to protect the susceptible animals against tick infestation.
653 $aCST6
653 $aQRT-PCR
653 $aS100A7
653 $aTick resistance
653 $aTPT1
653 $aTRPV6
700 1 $aMACHADO, M. A.
700 1 $aGUIMARÃES, S. E. F.
700 1 $aGUIMARAES, M. F. M.
700 1 $aPEIXOTO, J. O.
700 1 $aFURLONG, J.
700 1 $aPRATA, M. C. de A.
700 1 $aVERNEQUE, R. da S.
700 1 $aTEODORO, R. L.
700 1 $aLOPES, P. S.
773 $tGenetics and Molecular Research$gv. 9, n. 4, p. 1974-1979, 2010.
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Registro original: |
Embrapa Gado de Leite (CNPGL) |
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