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Registro Completo |
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Biblioteca(s): |
Embrapa Gado de Leite. |
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Data corrente: |
24/01/2015 |
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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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Autoria: |
O'BRIEN, A. M. P.; UTSUNOMIYA, Y. T.; MÉSZÁROS, G.; BICKHART, D. M.; LIU, G. E.; TASSEL, C. P. V.; SONSTEGARD, T. S.; SILVA, M. V. G. B.; GARCIA, J. F.; SÖLKNER, J. |
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Afiliação: |
ANA M. PÉREZ O'BRIEN, University of Natural Resources and Life Sciences, Vienna; YURI T. UTSUNOMIYA, UNESP; GÁBOR MÉSZÁROS, University of Natural Resources and Life Sciences, Vienna; DEREK M BICKHART, ARS-USDA, USA; GEORGE E. LIU, ARS-USDA, USA; CURTIS P. VAN TASSEL, ARS-USDA, USA; TAD S. SONSTEGARD, ARS-USDA, USA; MARCOS VINICIUS GUALBERTO B SILVA, CNPGL; JOSÉ F. GARCIA, UNESP; JOHANN SÖLKNER, University of Natural Resources and Life Sciences, Vienna. |
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Título: |
Assessing signatures of selection through variation in linkage disequilibrium between taurine and indicine cattle. |
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Ano de publicação: |
2014 |
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Fonte/Imprenta: |
Genetics Selection Evolution, v. 46, n. 19, 2014. |
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Páginas: |
14 p. |
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Idioma: |
Inglês |
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Conteúdo: |
Signatures of selection are regions in the genome that have been preferentially increased in frequency and fixed in a population because of their functional importance in specific processes. These regions can be detected because of their lower genetic variability and specific regional linkage disequilibrium (LD) patterns. By comparing the differences in regional LD variation between dairy and beef cattle types, and between indicine and taurine subspecies, we aim at finding signatures of selection for production and adaptation in cattle breeds. The VarLD method was applied to compare the LD variation in the autosomal genome between breeds, including Angus and Brown Swiss, representing taurine breeds, and Nelore and Gir, representing indicine breeds. The conclusions are that VarLD method is a powerful tool to identify differences in linkage disequilibrium between cattle populations and putative signatures of selection with potential adaptive and productive importance. |
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Palavras-Chave: |
Indicine; Minor allele frequency. |
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Thesaurus Nal: |
Genetic improvement; Linkage disequilibrium; Taurine. |
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Categoria do assunto: |
G Melhoramento Genético |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/116426/1/Cnpgl-2014-Genetics-Selection-Evolution-Assessing-signatures-of-selection.pdf
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Marc: |
LEADER 01864naa a2200301 a 4500
001 2006605
005 2024-02-05
008 2014 bl uuuu u00u1 u #d
100 1 $aO'BRIEN, A. M. P.
245 $aAssessing signatures of selection through variation in linkage disequilibrium between taurine and indicine cattle.$h[electronic resource]
260 $c2014
300 $a14 p.
520 $aSignatures of selection are regions in the genome that have been preferentially increased in frequency and fixed in a population because of their functional importance in specific processes. These regions can be detected because of their lower genetic variability and specific regional linkage disequilibrium (LD) patterns. By comparing the differences in regional LD variation between dairy and beef cattle types, and between indicine and taurine subspecies, we aim at finding signatures of selection for production and adaptation in cattle breeds. The VarLD method was applied to compare the LD variation in the autosomal genome between breeds, including Angus and Brown Swiss, representing taurine breeds, and Nelore and Gir, representing indicine breeds. The conclusions are that VarLD method is a powerful tool to identify differences in linkage disequilibrium between cattle populations and putative signatures of selection with potential adaptive and productive importance.
650 $aGenetic improvement
650 $aLinkage disequilibrium
650 $aTaurine
653 $aIndicine
653 $aMinor allele frequency
700 1 $aUTSUNOMIYA, Y. T.
700 1 $aMÉSZÁROS, G.
700 1 $aBICKHART, D. M.
700 1 $aLIU, G. E.
700 1 $aTASSEL, C. P. V.
700 1 $aSONSTEGARD, T. S.
700 1 $aSILVA, M. V. G. B.
700 1 $aGARCIA, J. F.
700 1 $aSÖLKNER, J.
773 $tGenetics Selection Evolution$gv. 46, n. 19, 2014.
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Registro original: |
Embrapa Gado de Leite (CNPGL) |
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 | Acesso ao texto completo restrito à biblioteca da Embrapa Amazônia Oriental. Para informações adicionais entre em contato com cpatu.biblioteca@embrapa.br. |
Registro Completo
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Biblioteca(s): |
Embrapa Amazônia Oriental. |
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Data corrente: |
08/07/2005 |
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Data da última atualização: |
30/11/2022 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
Internacional - A |
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Autoria: |
VIEIRA, I. C. G.; ALMEIDA, A. S. de; DAVIDSON, E. A.; STONE, T. A.; CARVALHO, C. J. R. de; GUERRERO, J. B. |
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Afiliação: |
IMA CÉLIA G. VIEIRA, MPEG; ARLETE SILVA DE ALMEIDA, MPEG; ERIC A. DAVIDSON, The Woods Hole Research Center; THOMAS A. STONE, The Woods Hole Research Center; CLAUDIO JOSE REIS DE CARVALHO, CPATU; JOSÉ BENITO GUERRERO, Instituto de Pesquisa Ambiental da Amazônia. |
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Título: |
Classifying successional forests using landsat spectral properties and ecological characteristics in eastern Amazônia. |
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Ano de publicação: |
2003 |
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Fonte/Imprenta: |
Remote Sensing of Environment, v. 87, n. 4, p. 470-481, 2003. |
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Descrição Física: |
il. |
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DOI: |
http://dx.doi.org/10.1016/j.rse.2002.09.002 |
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Idioma: |
Inglês |
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Conteúdo: |
Secondary forests may become increasingly important as temporary reservoirs of genetic diversity, stocks of carbon and nutrients, and moderators of hydrologic cycles in the Amazon Basin as agricultural lands are abandoned and often later cleared again for agriculture. We studied a municipality in northeastern Pará, Brazil, that has been settled for over a century and where numerous cycles of slash and burn agriculture have occurred. The forests were grouped into young (3?6 years), intermediate (10?20 years), advanced (40?70 years), and mature successional stages using 1999 Landsat 7 ETM imagery. Supervised classification of the imagery showed that these forest classes occupied 22%, 13%, 9%, and 6% of the area, respectively. Although this area underwent widespread deforestation many decades ago, forest of some type covers about 50% of the area. Row crops, tree crops, and pastures cover 8%, 20%, and 22%, respectively. The best separation among land covers appeared in a plot of NDVI versus band 5 reflectance. The same groupings of successional forests were derived independently from indices of similarity among tree species composition. Measured distributions of tree height and diameter also covaried with these successional classes, with the young forests having nearly uniform distributions, whereas multiple height and diameter classes were present in the advanced successional forests. Biomass accumulated more slowly in this secondary forest chronosequence than has been reported for other areas, which explains why the 70-year-old forests here were still distinguishable from mature forests using spectral properties. Rates of forest regrowth may vary across regions due to differences in edaphic, climatic, and historical land-use factors, thus rendering most relationships among spectral properties and forest age site-specific. Successional status, as characterized by species composition, biomass, and distributions of heights and diameters, may be superior to stand age as a means of stratifying these forests for characterization of spectral properties. MenosSecondary forests may become increasingly important as temporary reservoirs of genetic diversity, stocks of carbon and nutrients, and moderators of hydrologic cycles in the Amazon Basin as agricultural lands are abandoned and often later cleared again for agriculture. We studied a municipality in northeastern Pará, Brazil, that has been settled for over a century and where numerous cycles of slash and burn agriculture have occurred. The forests were grouped into young (3?6 years), intermediate (10?20 years), advanced (40?70 years), and mature successional stages using 1999 Landsat 7 ETM imagery. Supervised classification of the imagery showed that these forest classes occupied 22%, 13%, 9%, and 6% of the area, respectively. Although this area underwent widespread deforestation many decades ago, forest of some type covers about 50% of the area. Row crops, tree crops, and pastures cover 8%, 20%, and 22%, respectively. The best separation among land covers appeared in a plot of NDVI versus band 5 reflectance. The same groupings of successional forests were derived independently from indices of similarity among tree species composition. Measured distributions of tree height and diameter also covaried with these successional classes, with the young forests having nearly uniform distributions, whereas multiple height and diameter classes were present in the advanced successional forests. Biomass accumulated more slowly in this secondary forest chronosequence than has been reported... Mostrar Tudo |
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Thesagro: |
Biodiversidade; Biomassa; Desmatamento; Ecologia Florestal; Floresta Secundaria; Sensoriamento Remoto. |
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Thesaurus NAL: |
Amazonia. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 02979naa a2200289 a 4500
001 1407035
005 2022-11-30
008 2003 bl uuuu u00u1 u #d
024 7 $ahttp://dx.doi.org/10.1016/j.rse.2002.09.002$2DOI
100 1 $aVIEIRA, I. C. G.
245 $aClassifying successional forests using landsat spectral properties and ecological characteristics in eastern Amazônia.$h[electronic resource]
260 $c2003
300 $cil.
520 $aSecondary forests may become increasingly important as temporary reservoirs of genetic diversity, stocks of carbon and nutrients, and moderators of hydrologic cycles in the Amazon Basin as agricultural lands are abandoned and often later cleared again for agriculture. We studied a municipality in northeastern Pará, Brazil, that has been settled for over a century and where numerous cycles of slash and burn agriculture have occurred. The forests were grouped into young (3?6 years), intermediate (10?20 years), advanced (40?70 years), and mature successional stages using 1999 Landsat 7 ETM imagery. Supervised classification of the imagery showed that these forest classes occupied 22%, 13%, 9%, and 6% of the area, respectively. Although this area underwent widespread deforestation many decades ago, forest of some type covers about 50% of the area. Row crops, tree crops, and pastures cover 8%, 20%, and 22%, respectively. The best separation among land covers appeared in a plot of NDVI versus band 5 reflectance. The same groupings of successional forests were derived independently from indices of similarity among tree species composition. Measured distributions of tree height and diameter also covaried with these successional classes, with the young forests having nearly uniform distributions, whereas multiple height and diameter classes were present in the advanced successional forests. Biomass accumulated more slowly in this secondary forest chronosequence than has been reported for other areas, which explains why the 70-year-old forests here were still distinguishable from mature forests using spectral properties. Rates of forest regrowth may vary across regions due to differences in edaphic, climatic, and historical land-use factors, thus rendering most relationships among spectral properties and forest age site-specific. Successional status, as characterized by species composition, biomass, and distributions of heights and diameters, may be superior to stand age as a means of stratifying these forests for characterization of spectral properties.
650 $aAmazonia
650 $aBiodiversidade
650 $aBiomassa
650 $aDesmatamento
650 $aEcologia Florestal
650 $aFloresta Secundaria
650 $aSensoriamento Remoto
700 1 $aALMEIDA, A. S. de
700 1 $aDAVIDSON, E. A.
700 1 $aSTONE, T. A.
700 1 $aCARVALHO, C. J. R. de
700 1 $aGUERRERO, J. B.
773 $tRemote Sensing of Environment$gv. 87, n. 4, p. 470-481, 2003.
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Embrapa Amazônia Oriental (CPATU) |
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