Sabiia Seb
PortuguêsEspañolEnglish
Embrapa
        Busca avançada

Botão Atualizar


Botão Atualizar

Ordenar por: RelevânciaAutorTítuloAnoImprime registros no formato resumido
Registros recuperados: 404
Primeira ... 123456789 ... Última
Imagem não selecionada

Imprime registro no formato completo
16s-23S rDNA: polymorphisms and their use for detection and identification of Xylella fastidiosa strains BJM
Martinati,Juliana Camargo; Pacheco,Flávia Tereza Hansen; Miranda,Vitor Fernandes Oliveira de; Tsai,Siu Mui.
Strains of Xylella fastidiosa from several hosts (coffee, citrus, grape, almond, oleander, peach, plum, etc.) were characterized by analyzing the content of the nucleotide sequences of 16S-23S rDNA (coding for a small subunit ribosomal RNA) spacer region (ITS). Current methods for sequencing the ITS region yields partial sequences that do not contribute with significant information. According to this fact, new primers have been designed in order to obtain a complete sequence and facilitate the sequencing. The complete 16S-23S sequences from 08 strains were amplified through PCR using the primers designed in our lab. The 16S-23S sequences obtained were compared with 52 others sequences entries in GenBank database. The results revealed a higher level of...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Genetic diversity; 16S-23S rDNA; Intergenic spacer; Identification; Detection.
Ano: 2007 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822007000100033
Imagem não selecionada

Imprime registro no formato completo
A comparative genetic diversity assessment of industrial and household Brazilian cassava varieties using SSR markers Bragantia
Siqueira,Marcos Vinicius Bohrer Monteiro; Borges,Aline; Valle,Teresa Losada; Veasey,Elizabeth Ann.
This study was carried out in order to assess the genetic diversity of 20 cassava (Manihot esculenta Crantz) genotypes with high phenotypic performance using microsatellite markers. Two groups were considered for this study: eleven varieties for industrial uses and nine for household consumption. By using nine microsatellite primers, high polymorphism was identified in all the loci analyzed, with values reaching 100%. On average, 3.4 alleles per locus were found, with 0.371 the value estimated for the observed heterozygosity and 0.555 for gene diversity for the entire set of varieties. The genetic variability found in both varieties, cultivated on a large-scale in the South Center region of Brazil, is wide enough to allow the choice of divergent parental...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Manihot esculenta; Genetic diversity; Germplasm; Microsatellites.
Ano: 2011 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87052011000400003
Imagem não selecionada

Imprime registro no formato completo
A lima bean core collection based on molecular markers Scientia Agricola
Gomes,Regina Lucia Ferreira; Costa,Marcones Ferreira; Alves-Pereira,Alessandro; Bajay,Miklos Maximiliano; Viana,João Paulo Gomes; Valente,Sérgio Emílio dos Santos; Lopes,Ângela Celis de Almeida; Zucchi,Maria Imaculada; Pinheiro,José Baldin.
ABSTRACT Some germplasm collections have a high number of accessions, which makes it difficult to explore the genetic variability present in the germplasm bank due to the redundancy and the difficulty of detailed analysis of all conserved accessions. Therefore, our study aimed to analyze the genetic diversity of 153 lima bean (Phaseolus lunatus) accessions for the purpose of constructing a core collection. Eleven SSRs were used for this purpose. The 153 lima bean accessions can be represented by low redundancy using a minimum of 34 accessions, thus representing 22 % of the size of the entire germplasm bank. The core collection had a higher Shannon diversity index and expected heterozygosity (1.906 and 0.811, respectively) than those presented by the entire...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Germplasm; Genetic diversity; Genetic structure; Microsatellite markers.
Ano: 2020 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162020000201100
Imagem não selecionada

Imprime registro no formato completo
Acquisition de données complémentaires aux dénombrements, avec les techniques d’analyses pigmentaires et de diversité génétique. Etat d’avancement et premiers résultats. Action Indice Composition. Livrable n° AIV. Rapport final, 16 juillet 2014. ArchiMer
Delmas, Daniel; Siano, Raffaele.
Studies on phytoplankton community diversity cannot be limited microphytoplankton (cells>20 ìm), it is indeed necessary to take into account also the nano (3-20ìm) picophytoplankton (<3 ìm) components. In the frame of this work aimed at studying temporal phytoplankton community diversity two complementary methodologies of phytoplankton sample analysis, pigment and genetic (metarbarcoding) diversity, have been used as alternative to routine morphological analysis carried out at light microscopy. The REPHY station (047-P-016 Concarneau Large) off-shore the Concarneau Bay has been sampled during the annual highest phytoplankton production (March-July 2012) with a frequent sample interval strategy (twice per week). Results obtained by both pigment and...
Tipo: Text Palavras-chave: Phytoplancton; Structure de taille; Picophytoplancton; Nanophytoplancton; Microphytoplancton; Diversité génétique; Metabarcoding; Taxonomie pigmentaire; Façade atlantique; Baie de Concarneau; Phytoplankton; Size classes; Picophytoplankton; Nanophytoplankton; Microphytoplankton; Genetic diversity; Metabarcoding; Pigment taxonomy; Atlantic coasts; Concarneau Bay.
Ano: 2014 URL: http://archimer.ifremer.fr/doc/00361/47260/47225.pdf
Imagem não selecionada

Imprime registro no formato completo
Adaptation of Coffea arabica F1 Hybrids to various environmental conditions. Repositório Alice
CHARMETANT, P.; PEREIRA, L. F.; SERA, G. H.; MARRACCINI, P.; ANDRADE, A. C.; MOUEN, J.; AUKOUMOU, M. M.; ANNEBIQUE, F.; LEROY, T..
bitstream/item/170797/1/Adaptation-of-Coffee-arabica-F1-Hybrids.pdf
Tipo: Resumo em anais de congresso (ALICE) Palavras-chave: Genetic diversity; Coffea arabica; General combining ability.
Ano: 2017 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1084965
Imagem não selecionada

Imprime registro no formato completo
AFLP marker analysis revealing genetic structure of the tree Parapiptadenia rigida (Benth.) Brenan (Leguminosae-Mimosoideae) in the southern Brazilian Tropical Rainforest Genet. Mol. Biol.
Souza,Laís Bérgamo de; Ruas,Eduardo A.; Rodrigues,Luana A.; Ruas,Claudete F.; Ruas,Paulo M..
Parapiptadenia rigida is a tropical early secondary succession tree characteristic of the Tropical Atlantic Rainforest. This species is of great ecological importance in the recovery of degraded areas. In this study we investigated the variability and population genetic structure of eight populations of P. rigida. Five AFLP primer combinations were used in a sample of 159 individuals representing these eight populations, rendering a total of 126 polymorphic fragments. The averages of percentage of polymorphic loci, gene diversity, and Shannon index were 60.45%, 0.217, and 0.322, respectively. A significant correlation between the population genetic variability and the population sizes was observed. The genetic variability within populations (72.20%) was...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Tropical tree; Genetic diversity; Population genetics; Conservation; AFLP.
Ano: 2013 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572013000400012
Imagem não selecionada

Imprime registro no formato completo
AFLP polymorphism in restored provenances of Ceiba aesculifolia within an urban heat island Phyton
Olvera-Mendoza,EI; Lara-Cabrera,SI; Sáenz-Romero,C; Lindig-Cisneros,R.
To quantify the effect on genetic diversity of restoring tree populations in an area under the influence of an urban heat island, we evaluated the genetic diversity of 72 Ceiba aesculifolia individuals, from a restoration experiment established from 2170 to 2260 m a.s.l. Reintroduced individuals were compared with the provenance from which the seeds were obtained, and two external provenances, for a total of 123 individuals. Samples were analyzed with three AFLP primer combinations. Polymorphisms of 38.4 to 62.5% were obtained. Genetic diversity estimated with the Simpson index ranged from 0.14 to 0.2. The provenances in the restoration site had higher diversity than the provenance that originated the seeds. Groups formed with provenances with similar...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Genetic diversity; AFLP; Restoration ecology; Ceiba aesculifolia; Protected Natural Area.
Ano: 2016 URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1851-56572016000200001
Imagem não selecionada

Imprime registro no formato completo
Allelic diversity in populations of Solanum lycocarpum A. St.-Hil (Solanaceae) in a protected area and a disturbed environment Acta Botanica
Moura,Tânia Maria de; Sebbenn,Alexandre Magno; Martins,Karina; Moreno,Maria Andreia; Oliveira,Giancarlo Conde Xavier; Chaves,Lázaro José; Kageyama,Paulo Yoshio.
This study aimed to compare the genetic diversity of populations of Solanum lycocarpum A.St.-Hil between natural and human disturbed environments, with the assumption that protected areas have greater genetic diversity than disturbed areas. For this study, two populations were sampled in Goiás State, Brazil. One was located in a conservation unit, Serra de Caldas Novas State Park, in the Caldas Novas municipality. The other was located in a pasture area in the municipality of Morrinhos. The two populations are 41 km apart. We sampled 60 individuals from each population, which were genotyped with five microsatellite loci (SSR). The highest number of alleles was recorded in the population of the conservation unit, where we found 11 exclusive and five rare...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Cerrado; Gene flow; Conservation genetics; Genetic diversity.
Ano: 2011 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062011000400023
Imagem não selecionada

Imprime registro no formato completo
Allozyme variation in a natural population of Stryphnodendron adstringens in the Rio Preto State Park, southeastern Brazil Rev. Bras. Bot.
Glasenapp,Jacqueline Siqueira; Barbosa,Priscila Barros; Casali,Vicente Wagner Dias; Martins,Ernane Ronie; Cruz,Cosme Damião.
Leaves and fruits from 63 Stryphnodendron adstringens trees were sampled in the Rio Preto State Park to analyze allozyme segregation, tissue specific expression of allozyme loci, and their genetic parameters. The enzyme systems ADH, EST, ACP, PGM, PGI, GDH, G6PDH, GOT, IDH, LAP, MDH, PER and SKDH were assessed by means of starch-gel electrophoresis. The polymorphic systems PGI, IDH, MDH and GOT demonstrated a dimeric quaternary structure, while EST and PER were monomeric. The total expected genetic diversity (H E) for leaves and seeds were 0.325 and 0.244 respectively. The effective number of alleles per locus (A E) was 1.58 in leaves and 1.42 in seeds. The values of H E and A E observed in S. adstringens were comparatively higher than the average values...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Allozyme segregation; Genetic diversity; Heterozygosity; Medicinal plants.
Ano: 2012 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-84042012000200003
Imagem não selecionada

Imprime registro no formato completo
Análise da diversidade genética da população de Paenibacillus na rizosfera de milho plantado em solo de cerrado e de várzea, através de métodos moleculares. Repositório Alice
SILVA, K.R.; ROSADO, A.S.; MARRIEL, I. E.; PAIVA, E.; SELDIN, L..
1999
Tipo: Resumo em anais de congresso (ALICE) Palavras-chave: Milho; Rizosfera; Cerrado; Varzea; Diversidade genetica; Zea mays; Paenibacillus; Maize; Rhizosphere; Genetic diversity; Savanna.
Ano: 1999 URL: http://www.alice.cnptia.embrapa.br/handle/doc/483538
Imagem não selecionada

Imprime registro no formato completo
Analise da diversidade genetica do arroz silvestre americano (Oryza spp) atraves de marcadores moleculares. Repositório Alice
BUSO, G.S.C.; BERTOZO, M.R.; RANGEL, P.H.; FERREIRA, M.E..
1996
Tipo: Resumo em anais de congresso (ALICE) Palavras-chave: Arroz silvestre; Diversidade genetica; Marcadores moleculares %% Wild rice; Genetic diversity; Molecular markers.
Ano: 1996 URL: http://www.alice.cnptia.embrapa.br/handle/doc/171468
Imagem não selecionada

Imprime registro no formato completo
Analysis of genetic diversity among Indian niger [Guizotia abyssinica (L. f.) Cass.] cultivars based on randomly amplified polymorphic DNA markers Electron. J. Biotechnol.
Nagella,Praveen; Hosakatte,Niranjana Murthy; Ravishankar,K.V.; Hahn,Eun-Joo; Paek,Kee-Yoeup.
Randomly amplified polymorphic DNA (RAPD) markers were used to estimate genetic diversity among 18 cultivars of niger from India. Total genomic DNA was extracted and subjected to RAPD analysis using 80 arbitrary 10-mer primers; 17 primers were selected, which yielded a total of 124 bands, 41.20% of them polymorphic. None of the primers produced unique banding pattern for each cultivar. RAPD data were used to calculate a Squared-Euclidean Distance matrix which revealed a minimum genetic distance between cultivars JNC-6 and N-48 and a maximum distance between IGP-76 and JN-30. Based on the distance matrix, a cluster analysis was done using a minimum variance algorithm. The dendrogram generated, based on Ward&#8217;s method, grouped 18 niger cultivars...
Tipo: Journal article Palavras-chave: Genetic diversity; Guizotia abyssinica; Molecular markers; RAPD.
Ano: 2008 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582008000100014
Imagem não selecionada

Imprime registro no formato completo
Analysis of genetic diversity and population structure in Argentine and Bolivian Creole cattle using five loci related to milk production Genet. Mol. Biol.
Lirón,J.P.; Ripoli,M.V.; De Luca,J.C.; Peral-García,P.; Giovambattista,G..
Data from five protein-coding loci related to dairy production were used to study the genetic diversity and population structure of Argentine and Bolivian Creole cattle breeds. Genomic DNA was extracted from blood samples of six Creole cattle breeds: Argentine (n = 230), Patagonian (n = 25); "Saavedreño" (n = 140), "Chaqueño Boliviano" (n = 30), "Yacumeño" (n = 27), and "Chusco" (n = 11). kappa-casein, beta-lactoglobulin, growth hormone and prolactin were measured by PCR-RFLP, while alphaS1-casein was typed by PCR-ASO. The results are discussed, focusing on: historical origin, recent differentiation and selection events, Zebu gene introgression, and population structure. This work shows that: (i) For the studied genes, the observed gene frequency profiles...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Creole cattle; Polymorphism; Genetic diversity; Molecular markers.
Ano: 2002 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572002000400010
Imagem não selecionada

Imprime registro no formato completo
Analysis of molecular and morphological diversity of Arbutus unedo in the interior North and Center of Portugal. IPB - Escola Superior Agrária
Lopes, Lucas; Sá, Olga; Baltasar, José Luís; Pereira, J.A.; Baptista, Paula.
In the Mediterranean Basin, the strawberry tree (Arbutus unedo L.) has medicinal, ornamental, economical, and environmental importance. During the last decades, several occurrences have caused the decline of the strawberry tree in Portugal being replaced by other species. In this context, the knowledge of genetic variability in the wild populations is essential for a proper conservation. This work aimed to characterize genetically and morphological 38 A. unedo genotypes, 30 of which located in Trás-os-Montes e Alto Douro region, and the remaining 8 genotypes in Beira Interior region, to assess their biodiversity. The genetic diversity was assessing by RAPD (Random Amplification of Polymorphic DNA) markers. The dendrogram was obtained from the matrix of...
Tipo: ConferenceObject Palavras-chave: Arbutus unedo; Genetic diversity; RAPD.
Ano: 2010 URL: http://hdl.handle.net/10198/4580
Imagem não selecionada

Imprime registro no formato completo
Analysis of the genetic diversity in Metopolophium dirhodum (Walker) (Hemiptera, Aphididae) by RAPD markers Rev. Bras. entomol.
Lopes-da-Silva,Marcelo; Vieira,Luiz Gonzaga Esteves.
The emergence of host-races within aphids may constitute an obstacle to pest management by means of plant resistance. There are examples of host-races within cereals aphids, but their occurrence in Rose Grain Aphid, Metopolophium dirhodum (Walker, 1849), has not been reported yet. In this work, RAPD markers were used to assess effects of the hosts and geographic distance on the genetic diversity of M. dirhodum lineages. Twenty-three clones were collected on oats and wheat in twelve localitites of southern Brazil. From twenty-seven primers tested, only four primers showed polymorphisms. Fourteen different genotypes were revealed by cluster analysis. Five genotypes were collected only on wheat; seven only on oats and two were collected in both hosts. Genetic...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Rose-Grain Aphid; Genetic diversity; Host-races; Insect-plant relationships.
Ano: 2007 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0085-56262007000100009
Imagem não selecionada

Imprime registro no formato completo
Analysis on genetic diversity of 51 Grape germplasm resources Ciência Rural
Yue,Qingchun; Zhang,Chenfei; Wang,Qinghao; Wang,Wenjing; Wang,Jinyang; Wu,Yueyan.
ABSTRACT: The objective of this study is to research the genetic diversity of the ‘ Zuijinxiang ’ grape and its mutant breeding F1 plants, we screened the excellent mutant plants with potential breeding value. 50 mutated single plants obtained from 137Cs-γ irradiated ‘Zuijinxiang’ grape seeds were used as research objects, and SCoT molecular marker technology was used for genetic diversity and variation analysis, and clustering research was carried out. The results showed that: (1) 36 SCoT primers produced abundant polymorphisms, and the amplification results showed obvious bright bands, and the amplification efficiency and polymorphism rate were 100%. (2) A total of 221 bands were amplified by 36 primers, of which 175 were rich in polymorphism, the...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Grape; SCoT markers; Genetic diversity; Cluster analysis.
Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782019001100406
Imagem não selecionada

Imprime registro no formato completo
Anastrepha species and their hosts in the Brazilian Amazon. Repositório Alice
ADAIME, R.; SOUSA, M. do S. M. de; PEREIRA, J. F.; OLIVEIRA, A. M.; ZUCCHI, R. A..
The database "Anastrepha species and their hosts in the Brazilian Amazon" was developed aiming to compile the existing information on Anastrepha species diversity, distribution and hosts, and to make this data available in an easy and accessible manner. The database covers the Brazilian Amazon geographic area, which includes the states of Acre, Amapá, Amazonas, Mato Grosso, Pará, Rondônia, Roraima, Tocantins and Maranhão. It was developed using free software tools and includes a map viewer using the Google Maps API. The database is available for public access on the Embrapa Amapá website or directly at http://anastrepha. cpafap.embrapa.br. Its data was sourced from the existing technical and scientific literature. Species occurrence, host plants and...
Tipo: Resumo em anais de congresso (ALICE) Palavras-chave: Diversidade genética; Genetic diversity; Praga de planta; Hospedeiro; Plant pest; Hosts fruits.
Ano: 2016 URL: http://www.alice.cnptia.embrapa.br/handle/doc/1063768
Imagem não selecionada

Imprime registro no formato completo
Antimicrobial resistance and genetic diversity of Escherichia coli isolated from humans and foods BJM
Melo,Daniela Benevides; Menezes,Ana Paula de Oliveira; Reis,Joice Neves; Guimarães,Alaíse Gil.
Antibiotic resistance has increased in recent years, raising the concern of public health authorities. We conducted a study of Escherichia coli isolates obtained from human and food samples to assess the prevalence of antimicrobial resistance and to determine the genotype and clonal relationship of 84 E. coli isolates (48 from humans and 36 from foods). An antimicrobial susceptibility test was performed using the disk diffusion method. Virulence factors were evaluated by multiplex PCR, and the clonal relationship among the resistant isolates was studied by Pulsed Field Gel Electrophoresis (PFGE). All isolates were susceptible to ceftriaxone. Overall, 26%, 20.2%, 15.4% and 6% of the isolates were resistant to tetracycline, ampicillin,...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Escherichia coli; Antimicrobial resistance; Food contamination; Genetic diversity.
Ano: 2015 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822015000401165
Imagem não selecionada

Imprime registro no formato completo
Application of microsatellite markers for breeding and genetic conservation of herds of Pantaneiro sheep Electron. J. Biotechnol.
Crispim,Bruno do Amaral; Seno,Leonardo de Oliveira; Egito,Andréa Alves do; Vargas Junior,Fernando Miranda de; Grisolia,Alexéia Barufatti.
Background The aim of the present study was to assess the genetic diversity of Pantaneiro sheep, using microsatellite markers, in order to assist maintenance and management plans, enhance mating systems and reduce the inbreeding rate. A total of 127 animals were genotyped at eight microsatellite loci. They belonged to populations from the Experimental Farm of the Universidade Federal da Grande Dourados (UFGD) (Dourados/MS/Brazil) and Embrapa Pantanal (Corumbá/MS/Brazil). Results The population of Pantaneiro sheep from the UFGD exhibited a high mean number of alleles (11.13) and allelic richness (10.66). The polymorphic information content was highly informative in the locus studied, resulting in a mean value of 0.71. Observed heterozygosity was lower than...
Tipo: Journal article Palavras-chave: Animal genetic resources; Genetic diversity; Kinship; Locally adapted breed; STR.
Ano: 2014 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582014000600010
Imagem não selecionada

Imprime registro no formato completo
Apport des informations moléculaires et cellulaires pour la caractérisation de la résistance de l'huître plate européenne vis-à-vis de la bonamiose, et pour la détection de signatures de la sélection naturelle ArchiMer
Harrang, Estelle.
The European flat oyster, an endemic species from European coasts, has been classified in the category of "endangered and/or declining species" since 2003. Indeed, the natural beds of this oyster, consumed since ancient times, have gradually been decimated by over-exploitation and by successive emergence of parasitic diseases. The parasite that causes the disease called bonamiosis has contributed to drastically reduce the French and European aquacultural production of flat oyster. Marine bivalve molluscs display two specificities that restrict possibilities to fight against diseases: they are grown in an open environment, and possess an innate immune system lacking in adaptive response. In this context, the selection of animaIs naturally resistant to...
Tipo: Text Palavras-chave: Huître plate Européenne; Ostre edulis; Bonamiose; Bonamia ostreae; Marqueurs SNP; Expression génique; Activité hémocytaire; Cartographie de liaison; QTL; EQTL; Populations naturelles; Diversité génétique; Sélection naturelle; European flat oyster; Ostrea edulis; Bonamiosis; Bonamia ostreae; SNP markers; Gene expression; Haemocytic activity; Linkage map; QTL; EQTL; Natural populations; Genetic diversity; Genetic structure; Natural selection.
Ano: 2012 URL: http://archimer.ifremer.fr/doc/00127/23785/21702.pdf
Registros recuperados: 404
Primeira ... 123456789 ... Última
 

Empresa Brasileira de Pesquisa Agropecuária - Embrapa
Todos os direitos reservados, conforme Lei n° 9.610
Política de Privacidade
Área restrita

Embrapa
Parque Estação Biológica - PqEB s/n°
Brasília, DF - Brasil - CEP 70770-901
Fone: (61) 3448-4433 - Fax: (61) 3448-4890 / 3448-4891 SAC: https://www.embrapa.br/fale-conosco

Valid HTML 4.01 Transitional