Research Article

Related GMR Articles

Conservation; Leguminosae; Molecular variation; Polymerase chain reaction

Dalbergia nigra (rosewood) is a long-lived leguminous species, which is endemic to the Brazilian Atlantic forest. Because of the high economic value of its wood, this species has been over-explored in recent years. Currently, rosewood is included in the IUCN Red List as vulnerable. We examined the genetic diversity of 87 specimens of D. nigra sampled from a continuous ... more

F.S. Juchum; J.B. Leal; L.M. Santos; M.P. Almeida; D. Ahnert; R.X. Corrêa
Genetic diversity; Polymerase chain reaction; Random amplified polymorphic DNA; Sugarcane

Genetic diversity of 20 sugarcane accessions in Pakistan was studied using 21 random amplified polymorphic DNA markers. The mean genetic distance between the cultivars was 39.03%, demonstrating that a large part of the genome is similar among the accessions. This probably arises from a lack of parental diversity, with few clones, which are themselves related, contributing to the parentage ... more

F.A. Khan; A. Khan; F.M. Azhar; S. Rauf
Atlantic rainforest; Lysis; Microbial DNA; Polymerase chain reaction; Soil

The need for the prospecting for and identification of new biomolecules is a reality. Molecular techniques allow access to the metabolic potential of microorganisms via the isolation of DNA from environmental samples, i.e., without the application of microbial culture techniques. With its great biological diversity, the Atlantic Rainforest biome has a soil rich in organic matter, some ... more

J.H. Amorim; T.N.S. Macena; G.V. Lacerda-Junior; R.P. Rezende; J.C.T. Dias; M. Brendel; J.C.M. Cascardo
Leptin; obese gene; Polymerase chain reaction; Quantitative trait loci; Restriction fragment length polymorphism

The aim of the present study was to identify polymorphisms in the leptin gene of 112 pigs and compare the maternal and paternal lineage of Pietrain and Large White breeds that underwent a divergent selection for over 30 years. DNA samples extracted from the blood of these animals were amplified by polymerase chain reaction and genotyped by restriction fragment length polymorphism ... more

A.C.P. Silveira; R.C. Antunes; J.F. Almeida; T.F. Braga; P.F.A. Freitas; A.S.M. César; A.S.M. César; E.C. Guimarães
DNA; Ladder; Polymerase chain reaction; λ DNA

Serving as a DNA molecular weight standard, the DNA ladder has been widely used in molecular biology applications. We developed a simple method for the preparation of a DNA marker, which involves designing primers to amplify 100- to 1000-bp DNA fragments using lambda DNA as a template for polymerase chain reaction, followed by extraction with phenol/chloroform, precipitation with ethanol ... more

T.Y. Wang; L. Wang; F. Wang
Cathechol-o-methyltransferase; Dopamine D3 receptor; Polymerase chain reaction; Restriction fragment length polymorphism; Schizophrenia; Single nucleotide polymorphism

Molecular components of the dopamine D3 receptor (DRD3) may play an important role in the pathophysiology of schizophrenia. Previous studies have demonstrated an association between DRD3 Ser9Gly and cathechol-o-methyltransferase (COMT, SNP = rs165656) polymorphisms and schizophrenia but the results were inconclusive. We investigated this apparent association between Ser9Gly (A/G) ... more

S.F. Tee; P.Y. Tang; H.C. Loh
Chickpea; Genetic diversity; Polymerase chain reaction; Random amplified polymorphic DNA

Genetic diversity analysis of chickpea germplasm can provide practical information for the selection of parental material and thus assist in planning breeding strategies. Chickpea seed is a good source of carbohydrates and proteins, constituting 80% of the total dry seed weight. Released cultivars and advanced lines of 30 chickpea genotypes were subjected to RAPD analysis for assessment ... more

F. Ahmad; A.I. Khan; F.S. Awan; B. Sadia; H.A. Sadaqat; S. Bahadur
Filamentous fungi; Fusarium oxysporum; Genomic DNA extraction; Polymerase chain reaction; Pyrenochaeta terrestris

DNA isolation from some fungal organisms of agronomic importance is difficult because they have cell walls or capsules that are relatively unsusceptible to lysis. We have developed a fast DNA isolation protocol for Fusarium oxysporum, which causes fusarium wilt disease in more than 100 plant species, and for Pyrenochaeta terrestris, which causes pink root in onions. This ... more

D. González-Mendoza; R. Argumedo-Delira; A. Morales-Trejo; A. Pulido-Herrera; L. Cervantes-Díaz; O. Grimaldo-Juarez; A. Alarcón
Genomic DNA extraction; Polymerase chain reaction; Prosopis spp

The extraction of high-quality genomic DNA from Prosopis spp for polymerase chain reaction (PCR) amplification is complicated, owing to the presence of a high percentage of secondary metabolites that bind to or co-precipitate with nucleic acids. In the present study, we report a modified sodium dodecyl sulfate/phenol protocol that eliminates the use of liquid nitrogen in the ... more

C.Y. Michel-López; D. González-Mendoza; O. Grimaldo-Juarez
Amazon; Epstein-Barr; Gastric cancer; Polymerase chain reaction; Resection margin

Gastric cancer is one of most frequent causes of death in Brazil. The city of Manaus has one of the highest incidences of this disease in Brazil. The Epstein-Barr virus (EBV) is a ubiquitous herpesvirus that is classified as a group 1 carcinogen by the International Agency for Research on Cancer. We obtained biopsies from 6 control subjects and 10 patients with gastric carcinomas living ... more

P.F. de Aquino; P.C. Carvalho; J.Sda Gama Fischer; A.Q.L. de Souza; J.S. Viana; S.R.S. Chalub; A.D.L. de Souza; M.G.C. Carvalho