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Registro Completo |
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Biblioteca(s): |
Embrapa Caprinos e Ovinos; Embrapa Recursos Genéticos e Biotecnologia. |
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Data corrente: |
24/09/2009 |
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Data da última atualização: |
26/01/2010 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
LÔBO, A. M. B. O.; LÔBO, R. N. B.; PAIVA, S. R. |
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Afiliação: |
Ana Maria Bezerra Oliveira Lôbo, pós-graduanda UFV; Raimundo Nonato Braga Lôbo, Embrapa Caprinos e Ovinos (CNPC); Samuel Rezende Paiva, Embrapa Recursos Genéticos e Biotecnologia. |
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Título: |
Aromatase gene and its effects on growth, reproductive and material ability traits in a multibreed sheep from Brazil. |
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Ano de publicação: |
2009 |
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Fonte/Imprenta: |
Genetics and Molecular Biology, v. 32, n. 3, p. 484-490, 2009. |
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Idioma: |
Inglês |
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Conteúdo: |
Abstract: We determined the polymorphism C242T of the aromatase gene (Cyp19) and its allelic frequency, as well as the effect of the variants on productive and reproductive traits in 71 purebred Santa Inês sheep, 13 purebred Brazilian Somali sheep, nine purebred Poll Dorset sheep, and 18 crossbred 1/2 Dorper sheep. The animals were genotyped using the PCR-RFLP technique. The influence of the animal's genotype on its performance or on the performance of its lambs was analyzed by the least square method. Another factor assessed was the importance of the animal's genotype in analysis models for quantitative breeding value estimates, and whether there were differences among the averages of breeding values of animals with different genotypes for this gene. In the sample studied, no AA individuals were observed; the AB and BB frequencies were 0.64 and 0.36, respectively. All Brazilian Somali sheep were of genotype BB. All 1/2 Dorper BB animals presented a lower age at first lambing, and the Santa Inês BB ewes presented a lower lambing interval. In these same genetic groups, AB ewes presented higher litter weight at weaning. This is evidence that BB ewes have a better reproductive performance phenotype, whereas AB ewes present a better maternal ability phenotype. However, in general, animals with genotype AB presented better average breeding values than those with genotype BB. |
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Palavras-Chave: |
Brasil; Lambing interval; PCR-RFLP; Peso corporal; SNP. |
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Thesagro: |
Ovino; Polimorfismo; Polimorfismo Genético. |
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Thesaurus Nal: |
Animal genetics; Body weight; Brazil; Genetic polymorphism; Genetic variation; Genotype; Litter weight; Polymorphism; Sheep. |
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Categoria do assunto: |
--
G Melhoramento Genético |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/52325/1/API-Aromatase-gene.pdf
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Marc: |
LEADER 02367naa a2200349 a 4500
001 1631104
005 2010-01-26
008 2009 bl uuuu u00u1 u #d
100 1 $aLÔBO, A. M. B. O.
245 $aAromatase gene and its effects on growth, reproductive and material ability traits in a multibreed sheep from Brazil.$h[electronic resource]
260 $c2009
520 $aAbstract: We determined the polymorphism C242T of the aromatase gene (Cyp19) and its allelic frequency, as well as the effect of the variants on productive and reproductive traits in 71 purebred Santa Inês sheep, 13 purebred Brazilian Somali sheep, nine purebred Poll Dorset sheep, and 18 crossbred 1/2 Dorper sheep. The animals were genotyped using the PCR-RFLP technique. The influence of the animal's genotype on its performance or on the performance of its lambs was analyzed by the least square method. Another factor assessed was the importance of the animal's genotype in analysis models for quantitative breeding value estimates, and whether there were differences among the averages of breeding values of animals with different genotypes for this gene. In the sample studied, no AA individuals were observed; the AB and BB frequencies were 0.64 and 0.36, respectively. All Brazilian Somali sheep were of genotype BB. All 1/2 Dorper BB animals presented a lower age at first lambing, and the Santa Inês BB ewes presented a lower lambing interval. In these same genetic groups, AB ewes presented higher litter weight at weaning. This is evidence that BB ewes have a better reproductive performance phenotype, whereas AB ewes present a better maternal ability phenotype. However, in general, animals with genotype AB presented better average breeding values than those with genotype BB.
650 $aAnimal genetics
650 $aBody weight
650 $aBrazil
650 $aGenetic polymorphism
650 $aGenetic variation
650 $aGenotype
650 $aLitter weight
650 $aPolymorphism
650 $aSheep
650 $aOvino
650 $aPolimorfismo
650 $aPolimorfismo Genético
653 $aBrasil
653 $aLambing interval
653 $aPCR-RFLP
653 $aPeso corporal
653 $aSNP
700 1 $aLÔBO, R. N. B.
700 1 $aPAIVA, S. R.
773 $tGenetics and Molecular Biology$gv. 32, n. 3, p. 484-490, 2009.
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Registro original: |
Embrapa Recursos Genéticos e Biotecnologia (CENARGEN) |
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Registro Completo
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Biblioteca(s): |
Embrapa Pesca e Aquicultura. |
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Data corrente: |
26/03/2014 |
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Data da última atualização: |
25/03/2015 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
B - 2 |
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Autoria: |
GUARDA, V. D. A.; GUARDA, R. D. A. |
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Afiliação: |
VITOR DEL ALAMO GUARDA, CNPASA; RENATO DEL' ALAMO GUARDA, NUSCIENCE, Itupeva-SP. |
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Título: |
Brazilian tropical grassland ecosystems: distribution and research advances. |
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Ano de publicação: |
2014 |
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Fonte/Imprenta: |
American Journal of Plant Sciences, v. 5, n. 7, p. 924-932, Mar. 2014. |
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DOI: |
http://dx.doi.org/10.4236/ajps.2014.57105 |
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Idioma: |
Inglês |
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Conteúdo: |
A few decades ago we sought the understanding of the functioning of Brazilian ecosystems. During these years, changes in the way land use were influenced primarily by economic issues involving the process of valuation of land in different regions. Furthermore, developments in research have provided productive increments that were well characterized in some phases. This paper aims to trace a brief history of the distribution of grassland ecosystems in Brazil and show how it has been the advances in research on forages and pastures in the country, pointing its evolution, transition times and trends. Moreover, it purports to show a perspective of the dynamics of occupation of Brazilian territory by these ecosystems. The information is presented on three occasions, seeking to encourage understanding of where livestock grazing occurs and how the dynamics of occupation of the area was favored by the search. Also, it shows how the research was fundamental for Brazil occupy little arable areas considered, making the country one of the largest producers of cattle in the world. |
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Thesagro: |
Cerrado; Ecossistema; Manejo; Pastagem; Pastejo. |
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Thesaurus NAL: |
Agroecosystems; Grasslands; Grazing management. |
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Categoria do assunto: |
P Recursos Naturais, Ciências Ambientais e da Terra |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/100162/1/cnpasa.pdf
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Marc: |
LEADER 01793naa a2200241 a 4500
001 1983390
005 2015-03-25
008 2014 bl uuuu u00u1 u #d
024 7 $ahttp://dx.doi.org/10.4236/ajps.2014.57105$2DOI
100 1 $aGUARDA, V. D. A.
245 $aBrazilian tropical grassland ecosystems$bdistribution and research advances.$h[electronic resource]
260 $c2014
520 $aA few decades ago we sought the understanding of the functioning of Brazilian ecosystems. During these years, changes in the way land use were influenced primarily by economic issues involving the process of valuation of land in different regions. Furthermore, developments in research have provided productive increments that were well characterized in some phases. This paper aims to trace a brief history of the distribution of grassland ecosystems in Brazil and show how it has been the advances in research on forages and pastures in the country, pointing its evolution, transition times and trends. Moreover, it purports to show a perspective of the dynamics of occupation of Brazilian territory by these ecosystems. The information is presented on three occasions, seeking to encourage understanding of where livestock grazing occurs and how the dynamics of occupation of the area was favored by the search. Also, it shows how the research was fundamental for Brazil occupy little arable areas considered, making the country one of the largest producers of cattle in the world.
650 $aAgroecosystems
650 $aGrasslands
650 $aGrazing management
650 $aCerrado
650 $aEcossistema
650 $aManejo
650 $aPastagem
650 $aPastejo
700 1 $aGUARDA, R. D. A.
773 $tAmerican Journal of Plant Sciences$gv. 5, n. 7, p. 924-932, Mar. 2014.
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Registro original: |
Embrapa Pesca e Aquicultura (CNPASA) |
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