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Registro Completo |
Biblioteca(s): |
Embrapa Acre. |
Data corrente: |
05/04/2021 |
Data da última atualização: |
28/06/2021 |
Tipo da produção científica: |
Artigo em Periódico Indexado |
Autoria: |
COSTA, N. A.; AZÊVEDO, H. S. F. da S.; SILVA, L. M. da; CUNHA, E. F. M.; SIVIERO, A.; CAMPOS, T. de. |
Afiliação: |
NATHALIA ALMEIDA COSTA, Universidade Federal do Acre (Ufac); HELLEN SANDRA FREIRES DA SILVA AZÊVEDO, Rede Bionorte; LUCIELIO MANOEL DA SILVA, CPAF-AC; ELISA FERREIRA MOURA CUNHA, CPATU; AMAURI SIVIERO, CPAF-AC; TATIANA DE CAMPOS, CPAF-AC. |
Título: |
Molecular characterizaion and core collection evaluation of Manihot esculenta Crantz. |
Ano de publicação: |
2020 |
Fonte/Imprenta: |
Bioscience Journal, v. 36, p. 22-35, Nov./Dec. 2020. Supp. 1. |
ISSN: |
1981-3163 |
DOI: |
http://dx.doi.org/ BJ-v36n0a2020-48247 |
Idioma: |
Inglês |
Conteúdo: |
Cassava is one of the most important subsistence crops in tropical regions. It is necessary to preserve and to know the genetic diversity existent for the adequate use of genetic resources. The evaluation of genetic diversity among genotypes results in information about potential parents in breeding programs, allows duplicates identification, and facilitates germplasm exchange between research institutions. The objective of this study was to characterize the genetic diversity of cassava accessions of North Brazil region. A total of 106 accessions were analyzed using ten microsatellite markers. The genetic parameters estimated were: expected heterozygosity (HE), observed heterozygosity (HO) and polymorphic information content (PIC). Clustering was performed using the UPGMA and Neighbor-Joining (NJ) method. Bayesian analysis, analysis of principal coordinates and identification of a core collection were also used. The ten loci amplified 8,40 alleles on average. The average heterozygosity estimates were: HE = 0.71, HO = 0.58 and PIC = 0.72. Genetic distances ranged from 0.158 to 0.908. Six (5,66%) accesses were redundant. Clustering and dispersion analysis didn?t differentiate bitter from sweet cassava, and there wasn?t correlation between groups and collect origin. The core collection consisted of 22 individuals that represented 94% of total allelic diversity and 20,75% of the base collection. The results indicate high dissimilarity between the accessions and allowed the detection of redundant genotypes, showing the use of genetic markers as informative tools for the management of collections. MenosCassava is one of the most important subsistence crops in tropical regions. It is necessary to preserve and to know the genetic diversity existent for the adequate use of genetic resources. The evaluation of genetic diversity among genotypes results in information about potential parents in breeding programs, allows duplicates identification, and facilitates germplasm exchange between research institutions. The objective of this study was to characterize the genetic diversity of cassava accessions of North Brazil region. A total of 106 accessions were analyzed using ten microsatellite markers. The genetic parameters estimated were: expected heterozygosity (HE), observed heterozygosity (HO) and polymorphic information content (PIC). Clustering was performed using the UPGMA and Neighbor-Joining (NJ) method. Bayesian analysis, analysis of principal coordinates and identification of a core collection were also used. The ten loci amplified 8,40 alleles on average. The average heterozygosity estimates were: HE = 0.71, HO = 0.58 and PIC = 0.72. Genetic distances ranged from 0.158 to 0.908. Six (5,66%) accesses were redundant. Clustering and dispersion analysis didn?t differentiate bitter from sweet cassava, and there wasn?t correlation between groups and collect origin. The core collection consisted of 22 individuals that represented 94% of total allelic diversity and 20,75% of the base collection. The results indicate high dissimilarity between the accessions and allowed the detec... Mostrar Tudo |
Palavras-Chave: |
Acre; Amazonas; Análise bayesiana; Bayesin analysis; Fitomejoramiento; Heterocigosidad; Heterozigosidade; Manioc; Marcador microssatélite; Método Neighbor-Joining; Método UPGMA; Repeticiones de microsatélite; Roraima; São Paulo; Variación genetica; Yuca. |
Thesagro: |
Mandioca; Manihot Esculenta; Marcador Genético; Melhoramento Genético Vegetal; Variação Genética. |
Thesaurus Nal: |
Cassava; Genetic variation; Heterozygosity; Microsatellite repeats; Plant breeding. |
Categoria do assunto: |
G Melhoramento Genético |
URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/222341/1/27114.pdf
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Marc: |
LEADER 03098naa a2200517 a 4500 001 2131056 005 2021-06-28 008 2020 bl uuuu u00u1 u #d 022 $a1981-3163 024 7 $ahttp://dx.doi.org/ BJ-v36n0a2020-48247$2DOI 100 1 $aCOSTA, N. A. 245 $aMolecular characterizaion and core collection evaluation of Manihot esculenta Crantz.$h[electronic resource] 260 $c2020 520 $aCassava is one of the most important subsistence crops in tropical regions. It is necessary to preserve and to know the genetic diversity existent for the adequate use of genetic resources. The evaluation of genetic diversity among genotypes results in information about potential parents in breeding programs, allows duplicates identification, and facilitates germplasm exchange between research institutions. The objective of this study was to characterize the genetic diversity of cassava accessions of North Brazil region. A total of 106 accessions were analyzed using ten microsatellite markers. The genetic parameters estimated were: expected heterozygosity (HE), observed heterozygosity (HO) and polymorphic information content (PIC). Clustering was performed using the UPGMA and Neighbor-Joining (NJ) method. Bayesian analysis, analysis of principal coordinates and identification of a core collection were also used. The ten loci amplified 8,40 alleles on average. The average heterozygosity estimates were: HE = 0.71, HO = 0.58 and PIC = 0.72. Genetic distances ranged from 0.158 to 0.908. Six (5,66%) accesses were redundant. Clustering and dispersion analysis didn?t differentiate bitter from sweet cassava, and there wasn?t correlation between groups and collect origin. The core collection consisted of 22 individuals that represented 94% of total allelic diversity and 20,75% of the base collection. The results indicate high dissimilarity between the accessions and allowed the detection of redundant genotypes, showing the use of genetic markers as informative tools for the management of collections. 650 $aCassava 650 $aGenetic variation 650 $aHeterozygosity 650 $aMicrosatellite repeats 650 $aPlant breeding 650 $aMandioca 650 $aManihot Esculenta 650 $aMarcador Genético 650 $aMelhoramento Genético Vegetal 650 $aVariação Genética 653 $aAcre 653 $aAmazonas 653 $aAnálise bayesiana 653 $aBayesin analysis 653 $aFitomejoramiento 653 $aHeterocigosidad 653 $aHeterozigosidade 653 $aManioc 653 $aMarcador microssatélite 653 $aMétodo Neighbor-Joining 653 $aMétodo UPGMA 653 $aRepeticiones de microsatélite 653 $aRoraima 653 $aSão Paulo 653 $aVariación genetica 653 $aYuca 700 1 $aAZÊVEDO, H. S. F. da S. 700 1 $aSILVA, L. M. da 700 1 $aCUNHA, E. F. M. 700 1 $aSIVIERO, A. 700 1 $aCAMPOS, T. de 773 $tBioscience Journal$gv. 36, p. 22-35, Nov./Dec. 2020. Supp. 1.
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Embrapa Acre (CPAF-AC) |
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Registro Completo
Biblioteca(s): |
Embrapa Pecuária Sudeste. |
Data corrente: |
16/11/2022 |
Data da última atualização: |
16/11/2022 |
Tipo da produção científica: |
Artigo de Divulgação na Mídia |
Autoria: |
MEDEIROS, S. R. de. |
Afiliação: |
SERGIO RAPOSO DE MEDEIROS, CPPSE. |
Título: |
Pecuária de corte no Brasil: bem mais do que um copo meio cheio. |
Ano de publicação: |
2022 |
Fonte/Imprenta: |
ScotConsultoria, Artigos, 11 out. 2022. |
Páginas: |
2 p. |
Idioma: |
Português |
Conteúdo: |
Perto da Copa do Mundo de 2014, escrevi um texto sobre como deveríamos aproveitar a oportunidade dela ser no Brasil e promover nossa pecuária de corte. |
Palavras-Chave: |
Área de vegetação nativa; Balanço dos gases de efeito estufa; Exportador de carne bovina; GEE; Integração Lavoura Pecuária; Melhoramento genético de forrageiras; Redução da área de pastagem; Reservas com florestas. |
Thesagro: |
Produção de Carne. |
Categoria do assunto: |
B Sociologia Rural |
URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/doc/1148309/1/10-PecuariaCorteBrasil.pdf
|
Marc: |
LEADER 00897nam a2200229 a 4500 001 2148309 005 2022-11-16 008 2022 bl uuuu u00u1 u #d 100 1 $aMEDEIROS, S. R. de 245 $aPecuária de corte no Brasil$bbem mais do que um copo meio cheio.$h[electronic resource] 260 $aScotConsultoria, Artigos, 11 out. 2022.$c2022 300 $a2 p. 520 $aPerto da Copa do Mundo de 2014, escrevi um texto sobre como deveríamos aproveitar a oportunidade dela ser no Brasil e promover nossa pecuária de corte. 650 $aProdução de Carne 653 $aÁrea de vegetação nativa 653 $aBalanço dos gases de efeito estufa 653 $aExportador de carne bovina 653 $aGEE 653 $aIntegração Lavoura Pecuária 653 $aMelhoramento genético de forrageiras 653 $aRedução da área de pastagem 653 $aReservas com florestas
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Embrapa Pecuária Sudeste (CPPSE) |
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