Consulta: creatorFacets:"Freitas,Loreta Brandão de"
Registros recuperados: 5
Data/hora: 06/06/2024 01:29:11

Multiple introductions and gene flow in subtropical South American populations of the fireweed, Senecio madagascariensis(Asteraceae)
Provedor de dados: 74
Autores: Mäder,Geraldo; Castro,Luana; Bonatto,Sandro Luis; Freitas,Loreta Brandão de.
Abstract Non-indigenous plants exhibit different attributes that make them aggressive competitors with indigenous plants and serious threats to biodiversity.Senecio madagascariensis (fireweed, Asteraceae), a native from southern Africa, is a strong competitor in agricultural activities and has toxic alkaloids that may result in high cattle mortality. In Brazil, this weed was collected for the first time in 1995 and has since spread quickly throughout the Pampas region. To better understand the invasion of the fireweed in South America, we used a genetic characterization with internal transcribed spacer (ITS) and microsatellite markers. Based on the ITS data, the southern Brazil populations of S. madagascariensis shared genetic homology with samples taken...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Microsatellites; ITS; Pampas; Weed; Spread.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572016000100135

LEI0258 microsatellite variability and its relationship to B-F haplotypes in Brazilian (blue-egg Caipira) chickens
Provedor de dados: 74
Autores: Lima-Rosa,Carlos André da Veiga; Canal,Cláudio Wageck; Fallavena,Paulo Roberto Vargas; Freitas,Loreta Brandão de; Salzano,Francisco Mauro.
A total of 149 chickens from two different sources (one non-commercial, the other commercial) was tested for variability of the LEI0258 microsatellite. Fifty- three genotypes, explainable by 15 alleles, were found. There are clear allele and heterozygosity differences between the two samples. One of them was simultaneously studied for the MHC B-F haplotypes. Strong genetic disequilibrium was observed between the variants of the two systems, therefore providing a cheap alternative for MHC genotyping.
Tipo: Info:eu-repo/semantics/other
Palavras-chave: Microsatellite; LEI0258; B-F haplotypes; Brazilian chickens.
Ano: 2005
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572005000300008

Characterization of mandarin citrus germplasm from Southern Brazil by morphological and molecular analyses
Provedor de dados: 86
Autores: Koehler-Santos,Patrícia; Dornelles,Ana Lúcia Cunha; Freitas,Loreta Brandão de.
The objective of this work was to characterize mandarin (Citrus spp.) germplasm from Southern Brazil by morphological and molecular analyses. Thirty seven cultivars from 34 distinct mandarin varieties were evaluated by morphological and agronomic traits of leaves, flowers and fruits, and by microsatellite markers. The morphological and agronomic characteristics suggested that almost all varieties can be produced for commercial use, and some, as the Satsuma variety, are recommended for breeding programs. Pooled DNA samples from 1-5 plants belonging to each cultivar were tested. Eight of the nine primers detected polymorphisms. Specific markers were found for some accessions. The dendrogram constructed with the morphological results divided the 37 cultivars...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Citrus; Genetic variation; Microsatellites; Breeding methods.
Ano: 2003
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2003000700003

Taxonomy and evolutionary relationships of Passiflora subg. Decaloba supersect. Decaloba sect. Xerogona (Passifloraceae): contributions of palynological, morphological and molecular studies
Provedor de dados: 39
Autores: Milward-de-Azevedo,Michaele Alvim; Freitas,Loreta Brandão de; Kinoshita,Luiza Sumiko.
Passiflora subg. Decaloba supersect. Decaloba sect. Xerogona (Passifloraceae) is a tropical and subtropical group comprising 14 species that occur in tropical biomes throughout Latin America, including the Atlantic Forest. The section Xerogona comprises herbaceous vines characterized by a lack of petiole glands on their leaves, of bracts and of ocelli on their leaf blades, as well as by their capsular fruits. We analyzed the phylogeny on the basis of morphological characters (including pollen characters) and molecular data. The inferred phylogeny was used in order to characterize, circumscribe and delimit the section and the species. We examined the phylogenetic relationships among the species, evaluating the circumscription of the section on the basis of...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Passiflora; Decaloba; Xerogona; Phylogenetics.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062014000300001

Pathogenesis-related proteins in Brazilian wheat genotypes: protein induction and partial gene sequencing
Provedor de dados: 65
Autores: Freitas,Loreta Brandão de; Koehler-Santos,Patrícia; Salzano,Francisco Mauro.
Leaves from 14 Brazilian genotypes of Triticum aestivum L. were treated with salicylic acid to induce pathogenesis-related (PR) proteins. Inter and intracellular extracts were then obtained and investigated through polyacrilamide gel electrophoresis. Seven bands were observed. Material related to two of them (of 40 and 24 kDa) occurred in intracellular spaces only. DNA from these same genotypes was then amplified through PCR using primers developed from three sequences encoding PR proteins, and compared with previously described sequences. The fragments presented homologies to PR groups 1, 3 (chitinases), and 5 (thaumatin-like). The PR3-like sequence also showed a site characteristic of PRs induced by ethylene and a portion without homology with previous...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Triticum aestivum L.; Defense proteins; Genetic variability.
Ano: 2003
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782003000300016