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Registro Completo |
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Biblioteca(s): |
Embrapa Gado de Corte. |
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Data corrente: |
21/02/2018 |
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Data da última atualização: |
21/02/2018 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
SOUZA-FILHO, A. F. de; OSÓRIO, A. L. A. R.; JORGE, K. dos S. G.; ARAUJO, F. R.; VIDAL, C. E. S.; ARAÚJO, C. P.; ALBERTTI, L. A. G.; CAZOLA, D. de O.; FERREIRA NETO, J. S.; HEINEMANN, M. B. |
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Afiliação: |
Antonio Francisco de Souza-Filho, Faculdade de Medicina Veterinária e Zootecnia/Universidade de São Paulo - USP; Ana Luiza Alves Rosa Osório, Faculdade de Medicina Veterinária e Zootecnia - UFMS; Klaudia dos Santos Gonçalves Jorge, Centro de Ciências Biológicas e da Saúde/Universidade Federal de Mato Grosso do Sul - UFMS; FLABIO RIBEIRO ARAUJO, CNPGC; Carlos Eugênio Soto Vidal, Universidade Federal de Santa Maria - UFSM; Cristina Pires Araújo, Faculdade de Medicina Veterinária e Zootecnia - UFMS; Letícia Alves Gomes Albertti, Faculdade de Medicina Veterinária e Zootecnia - UFMS; Daniela de Oliveira Cazola, Faculdade de Medicina Veterinária e Zootecnia - UFMS; José Soares Ferreira Neto, Faculdade de Medicina Veterinária e Zootecnia/USP; Marcos Bryan Heinemann, Faculdade de Medicina Veterinária e Zootecnia/USP. |
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Título: |
Genetic profiles of Mycobacterium bovis from a cattle herd in southernmost Brazil. |
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Ano de publicação: |
2016 |
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Fonte/Imprenta: |
Semina: Ciências Agrárias, Londrina, v. 37, n. 5, suplemento 2, p. 3719-3726, 2016 |
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Idioma: |
Inglês |
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Notas: |
Título em português: Perfis genéticos de Mycobacterium bovis em um rebanho bovino no extremo sul do Brasil. |
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Conteúdo: |
Mycobacterium bovis is the agent of bovine tuberculosis, a disease endemic to all Brazilian states. Molecular typing techniques help to stratify and refine data, providing information that facilitates epidemiological research. In this study, MIRU-VNTR, targeting 24 loci, was employed to identify and characterize the genetic groups of M. bovis isolates obtained from an outbreak of bovine tuberculosis. Eighteen acid-fast bacilli isolates, obtained from bovine tissue samples, and reactive to the comparative cervical tuberculin test, were identified as species of the M. tuberculosis complex, and were genotyped by MIRU-VNTR with 24 primer pairs. Genotyping revealed three genetic profiles comprising one with 15 isolates (83.3%), one with two isolates (11.1%), and one profile with one unique isolate (5.6%). This distinction was achieved with the MIRU 31 primer, which resulted in clustering of two isolates into the same profile, and ETR A, B, and C, which discriminated the isolate with a unique profile. The occurrence of clustered isolates is indicative of recent transmission, whereas isolates with a unique profile suggest reactivation of latent infection. The presence of different M. bovis genotypes in the same herd suggests movement of infected animals or different sources of intra-herd infection. Use of the MIRU-VNTR molecular epidemiology technique in M. bovis isolates obtained from an outbreak of bovine tuberculosis in Rio Grande do Sul state demonstrated the genetic diversity of circulating strains, despite the presence of a predominant group. MenosMycobacterium bovis is the agent of bovine tuberculosis, a disease endemic to all Brazilian states. Molecular typing techniques help to stratify and refine data, providing information that facilitates epidemiological research. In this study, MIRU-VNTR, targeting 24 loci, was employed to identify and characterize the genetic groups of M. bovis isolates obtained from an outbreak of bovine tuberculosis. Eighteen acid-fast bacilli isolates, obtained from bovine tissue samples, and reactive to the comparative cervical tuberculin test, were identified as species of the M. tuberculosis complex, and were genotyped by MIRU-VNTR with 24 primer pairs. Genotyping revealed three genetic profiles comprising one with 15 isolates (83.3%), one with two isolates (11.1%), and one profile with one unique isolate (5.6%). This distinction was achieved with the MIRU 31 primer, which resulted in clustering of two isolates into the same profile, and ETR A, B, and C, which discriminated the isolate with a unique profile. The occurrence of clustered isolates is indicative of recent transmission, whereas isolates with a unique profile suggest reactivation of latent infection. The presence of different M. bovis genotypes in the same herd suggests movement of infected animals or different sources of intra-herd infection. Use of the MIRU-VNTR molecular epidemiology technique in M. bovis isolates obtained from an outbreak of bovine tuberculosis in Rio Grande do Sul state demonstrated the genetic diversity ... Mostrar Tudo |
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Palavras-Chave: |
Diversidade genética; Genetical diversity; MIRU-VNTR; Tuberculose bovina. |
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Thesagro: |
Mycobacterium Bovis. |
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Thesaurus Nal: |
Bovine tuberculosis. |
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Categoria do assunto: |
-- |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/172941/1/28-Genetic-profiles-of-Mycobacterium-bovis-from-a-cattle-herd-in-southernmost-Brazil-2016.pdf
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Marc: |
LEADER 02626naa a2200313 a 4500
001 2087984
005 2018-02-21
008 2016 bl uuuu u00u1 u #d
100 1 $aSOUZA-FILHO, A. F. de
245 $aGenetic profiles of Mycobacterium bovis from a cattle herd in southernmost Brazil.$h[electronic resource]
260 $c2016
500 $aTítulo em português: Perfis genéticos de Mycobacterium bovis em um rebanho bovino no extremo sul do Brasil.
520 $aMycobacterium bovis is the agent of bovine tuberculosis, a disease endemic to all Brazilian states. Molecular typing techniques help to stratify and refine data, providing information that facilitates epidemiological research. In this study, MIRU-VNTR, targeting 24 loci, was employed to identify and characterize the genetic groups of M. bovis isolates obtained from an outbreak of bovine tuberculosis. Eighteen acid-fast bacilli isolates, obtained from bovine tissue samples, and reactive to the comparative cervical tuberculin test, were identified as species of the M. tuberculosis complex, and were genotyped by MIRU-VNTR with 24 primer pairs. Genotyping revealed three genetic profiles comprising one with 15 isolates (83.3%), one with two isolates (11.1%), and one profile with one unique isolate (5.6%). This distinction was achieved with the MIRU 31 primer, which resulted in clustering of two isolates into the same profile, and ETR A, B, and C, which discriminated the isolate with a unique profile. The occurrence of clustered isolates is indicative of recent transmission, whereas isolates with a unique profile suggest reactivation of latent infection. The presence of different M. bovis genotypes in the same herd suggests movement of infected animals or different sources of intra-herd infection. Use of the MIRU-VNTR molecular epidemiology technique in M. bovis isolates obtained from an outbreak of bovine tuberculosis in Rio Grande do Sul state demonstrated the genetic diversity of circulating strains, despite the presence of a predominant group.
650 $aBovine tuberculosis
650 $aMycobacterium Bovis
653 $aDiversidade genética
653 $aGenetical diversity
653 $aMIRU-VNTR
653 $aTuberculose bovina
700 1 $aOSÓRIO, A. L. A. R.
700 1 $aJORGE, K. dos S. G.
700 1 $aARAUJO, F. R.
700 1 $aVIDAL, C. E. S.
700 1 $aARAÚJO, C. P.
700 1 $aALBERTTI, L. A. G.
700 1 $aCAZOLA, D. de O.
700 1 $aFERREIRA NETO, J. S.
700 1 $aHEINEMANN, M. B.
773 $tSemina: Ciências Agrárias, Londrina$gv. 37, n. 5, suplemento 2, p. 3719-3726, 2016
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Registro original: |
Embrapa Gado de Corte (CNPGC) |
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Biblioteca(s): |
Embrapa Florestas. |
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Data corrente: |
09/05/2022 |
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Data da última atualização: |
10/05/2022 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
B - 5 |
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Autoria: |
TESHOME, M.; TORRES, C. M. M. E.; SILESHI, G. W.; MATTOS, P. P. de; BRAZ, E. M.; TEMESGEN, H.; ROCHA, S. J. S. S. da; ALEBACHEW, M. |
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Afiliação: |
MINDAYE TESHOME, Universidade Federal de Viçosa; Central Ethiopia Environment and Forest Research Centre; CARLOS MOREIRA MIQUELINO ELETO TORRES, Universidade Federal de Viçosa; GUDETA WELDESEMAYAT SILESHI, University of Kwazulu-Natal; PATRICIA POVOA DE MATTOS, CNPF; EVALDO MUNOZ BRAZ, CNPF; HAILEMARIAM TEMESGEN, Oregon State University; SAMUEL JOSÉ SILVA SOARES DA ROCHA, Universidade Federal de Lavras; MEHARI ALEBACHEW, Central Ethiopia Environment and Forest Research Centre. |
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Título: |
Mixed-Species allometric equations to quantify stem volume and tree biomass in Dry Afromontane Forest of Ethiopia. |
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Ano de publicação: |
2022 |
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Fonte/Imprenta: |
Open Journal of Forestry, v. 12, p. 263-296, 2022. |
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ISSN: |
2163-0437 |
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DOI: |
https://doi.org/10.4236/ojf.2022.123015 |
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Idioma: |
Português |
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Conteúdo: |
ABSTRACT. Volume and biomass equations are essential tools to determine forest productivity and enable forest managers to make informed ecisions. However, volume and biomass estimation equations are scarce for Afromontane forests in Africa in general and Ethiopia in particular. This limits our knowledge of the standing volume of wood, biomass, and carbon stock of the forests there in. In this study, we developed a new mixed-species volume and biomass equations for Afromontane forests and compared them with generic pantropical and local models. A total of 193 sampled trees from seven dominant tree species were used to develop the equations. Various volume and biomass equations were fitted using robust linear and nonlinear regression. Model comparison indicated that the best model to estimate stem volume was ln (v) = -9.909 + 0.954 * ln (d2h), whereas the best model to estimate biomass was ln (b) = -2.983 + 0.949 *ln (pd2h). These equations explained over 85% of the variations in the stem volume and biomass measurements. The mean density and basal area of trees in the forest with d >/= 2 cm was 631.5 stems-ha -1 and 24.4 m 2 ha -1. Based on the newly developed equations, the forest has on average 303.0 m3 ha -1 standing volume of wood and 283.8 Mg.ha -1 biomass stock. The newly developed allometric equations derived from this study can be used to accurately determine the stem volume, biomass, and carbon storage in the Afromontane forests in Ethiopia and elsewhere with similar stand characteristics and ecological conditions. By contrast, the generic pan-tropical and other local models appear to provide biased estimates and are not suitable for dry Afromontane forests in Ethiopia. The estimated stem biomass and carbon stock in the Chilimo forest are comparable with the estimates from various tropical forests and woodlands elsewhere in Africa, indicating the importance of dry Afromontane forest for climate change mitigation. MenosABSTRACT. Volume and biomass equations are essential tools to determine forest productivity and enable forest managers to make informed ecisions. However, volume and biomass estimation equations are scarce for Afromontane forests in Africa in general and Ethiopia in particular. This limits our knowledge of the standing volume of wood, biomass, and carbon stock of the forests there in. In this study, we developed a new mixed-species volume and biomass equations for Afromontane forests and compared them with generic pantropical and local models. A total of 193 sampled trees from seven dominant tree species were used to develop the equations. Various volume and biomass equations were fitted using robust linear and nonlinear regression. Model comparison indicated that the best model to estimate stem volume was ln (v) = -9.909 + 0.954 * ln (d2h), whereas the best model to estimate biomass was ln (b) = -2.983 + 0.949 *ln (pd2h). These equations explained over 85% of the variations in the stem volume and biomass measurements. The mean density and basal area of trees in the forest with d >/= 2 cm was 631.5 stems-ha -1 and 24.4 m 2 ha -1. Based on the newly developed equations, the forest has on average 303.0 m3 ha -1 standing volume of wood and 283.8 Mg.ha -1 biomass stock. The newly developed allometric equations derived from this study can be used to accurately determine the stem volume, biomass, and carbon storage in the Afromontane forests in Ethiopia and elsewhere with similar ... Mostrar Tudo |
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Palavras-Chave: |
Carbon stock; Estoque de carbono; Etiópia; Floresta natural; Modelo; Natural forest; Produtividade florestal; Regressão robusta; Robust regression; Site-specific model. |
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Thesagro: |
Biomassa. |
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Thesaurus NAL: |
Carbon. |
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Categoria do assunto: |
K Ciência Florestal e Produtos de Origem Vegetal |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/doc/1142795/1/Mattos-OpenJournalOfforestry-Mixed-Species-Allometric-Equations.pdf
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Marc: |
LEADER 03045naa a2200373 a 4500
001 2142795
005 2022-05-10
008 2022 bl uuuu u00u1 u #d
022 $a2163-0437
024 7 $ahttps://doi.org/10.4236/ojf.2022.123015$2DOI
100 1 $aTESHOME, M.
245 $aMixed-Species allometric equations to quantify stem volume and tree biomass in Dry Afromontane Forest of Ethiopia.$h[electronic resource]
260 $c2022
520 $aABSTRACT. Volume and biomass equations are essential tools to determine forest productivity and enable forest managers to make informed ecisions. However, volume and biomass estimation equations are scarce for Afromontane forests in Africa in general and Ethiopia in particular. This limits our knowledge of the standing volume of wood, biomass, and carbon stock of the forests there in. In this study, we developed a new mixed-species volume and biomass equations for Afromontane forests and compared them with generic pantropical and local models. A total of 193 sampled trees from seven dominant tree species were used to develop the equations. Various volume and biomass equations were fitted using robust linear and nonlinear regression. Model comparison indicated that the best model to estimate stem volume was ln (v) = -9.909 + 0.954 * ln (d2h), whereas the best model to estimate biomass was ln (b) = -2.983 + 0.949 *ln (pd2h). These equations explained over 85% of the variations in the stem volume and biomass measurements. The mean density and basal area of trees in the forest with d >/= 2 cm was 631.5 stems-ha -1 and 24.4 m 2 ha -1. Based on the newly developed equations, the forest has on average 303.0 m3 ha -1 standing volume of wood and 283.8 Mg.ha -1 biomass stock. The newly developed allometric equations derived from this study can be used to accurately determine the stem volume, biomass, and carbon storage in the Afromontane forests in Ethiopia and elsewhere with similar stand characteristics and ecological conditions. By contrast, the generic pan-tropical and other local models appear to provide biased estimates and are not suitable for dry Afromontane forests in Ethiopia. The estimated stem biomass and carbon stock in the Chilimo forest are comparable with the estimates from various tropical forests and woodlands elsewhere in Africa, indicating the importance of dry Afromontane forest for climate change mitigation.
650 $aCarbon
650 $aBiomassa
653 $aCarbon stock
653 $aEstoque de carbono
653 $aEtiópia
653 $aFloresta natural
653 $aModelo
653 $aNatural forest
653 $aProdutividade florestal
653 $aRegressão robusta
653 $aRobust regression
653 $aSite-specific model
700 1 $aTORRES, C. M. M. E.
700 1 $aSILESHI, G. W.
700 1 $aMATTOS, P. P. de
700 1 $aBRAZ, E. M.
700 1 $aTEMESGEN, H.
700 1 $aROCHA, S. J. S. S. da
700 1 $aALEBACHEW, M.
773 $tOpen Journal of Forestry$gv. 12, p. 263-296, 2022.
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Embrapa Florestas (CNPF) |
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