Consulta: subjectFacets:"DNA polymorphism"
Registros recuperados: 12
Data/hora: 10/06/2024 08:01:40

Assessment of somaclonal variation in somatic embryo-derived plants of yacon [Smallanthus sonchifolius (Poepp. and Endl.) H. Robinson] using inter simple sequence repeat analysis and flow cytometry
Provedor de dados: 69
Autores: Viehmannova,Iva; Bortlova,Zuzana; Vitamvas,Jan; Cepkova,Petra Hlasna; Eliasova,Katerina; Svobodova,Eva; Travnickova,Martina.
Background Yacon (Smallanthus sonchifolius) is a root crop native to the Andean region. Low sexual reproductive capacity is a major constraint facing the genetic breeding of this crop. Biotechnological techniques offer alternative ways to widen genetic variability. We investigated somaclonal variation in regenerants of yacon derived from in vitro somatic embryogenesis using simple sequence repeat (ISSR) analysis and flow cytometry. Results Twenty tested ISSR primers provided a total of 7848 bands in 60 in vitro regenerants and control plant. The number of bands for each primer varied from 3 to 10, and an average of 6.95 bands was obtained per ISSR primer. Eight primers were polymorphic and generated 10 polymorphic bands with 7.19% mean polymorphism. ISSR...
Tipo: Journal article
Palavras-chave: DNA polymorphism; Molecular markers; Ploidy level; Proembryogenic callus.
Ano: 2014
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582014000200008

GATM, the human ortholog of the mouse imprinted Gatm gene, escapes genomic imprinting in placenta
Provedor de dados: 74
Autores: Miyamoto,Toshinobu; Sengoku,Kazuo; Hayashi,Hiroaki; Sasaki,Yoshihito; Jinno,Yoshihiro; Ishikawa,Mutsuo.
The GATM gene encodes L-arginine:glycine amidinotransferase, which catalyzes the conversion of L-arginine into guanidinoacetate, the rate-limiting step in the synthesis of creatine. Since, deficiencies in creatine synthesis and transport lead to certain forms of mental retardation in human, the human GATM gene appears to be involved in brain development. Recently it has been demonstrated that the mouse Gatm is expressed during development and is imprinted with maternal expression in the placenta and yolk sac, but not in embryonic tissues. We investigated the imprinting status of the human GATM by analyzing its expression in four human placentas. GATM was biallelically expressed, thus suggesting that this gene escapes genomic imprinting in placentas,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: GATM gene; Genomic imprinting; DNA polymorphism.
Ano: 2005
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572005000100008

Exploitation of mitochondrial nad6 as a complementary marker for studying population variability in Lepidoptera
Provedor de dados: 74
Autores: Silva-Brandão,Karina L.; Lyra,Mariana L.; Santos,Thiago V.; Seraphim,Noemy; Albernaz,Karina C.; Pavinato,Vitor A.C.; Martinelli,Samuel; Cônsoli,Fernando L.; Omoto,Celso.
The applicability of mitochondrial nad6 sequences to studies of DNA and population variability in Lepidoptera was tested in four species of economically important moths and one of wild butterflies. The genetic information so obtained was compared to that of cox1 sequences for two species of Lepidoptera. nad6 primers appropriately amplified all the tested DNA targets, the generated data proving to be as informative and suitable in recovering population structures as that of cox1. The proposal is that, to obtain more robust results, this mitochondrial region can be complementarily used with other molecular sequences in studies of low level phylogeny and population genetics in Lepidoptera.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Cytochrome c oxidase I; Diatraea saccharalis; DNA polymorphism; Hermeuptychia atalanta; Noctuidae.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572011000400028

Biochemical and genetic analysis of butyrylcholinesterase (BChE) in a family, due to prolonged neuromuscular blockade after the use of succinylcholine
Provedor de dados: 74
Autores: Garcia,Daniel Fantozzi; Oliveira,Ticiano G.; Molfetta,Greice A.; Garcia,Luiz V.; Ferreira,Cristiane A.; Marques,Adriana A.; Silva Jr.,Wilson Araujo.
Butyrylcholinesterase (BChE) is a plasma enzyme that catalyzes the hydrolysis of choline esters, including the muscle-relaxant succinylcholine and mivacurium. Patients who present sustained neuromuscular blockade after using succinylcholine usually carry BChE variants with reduced enzyme activity or an acquired BChE deficiency. We report here the molecular basis of the BCHE gene underlying the slow catabolism of succinylcholine in a patient who underwent endoscopic nasal surgery. We measured the enzyme activity of BChE and extracted genomic DNA in order to study the promoter region and all exons of the BCHE gene of the patient, her parents and siblings. PCR products were sequenced and compared with reference sequences from GenBank. We detected that the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Hereditary hypocholinesterasemia; Butyrylcholinesterase; Succinylcholine BCHE gene; DNA polymorphism.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572011000100008

Morphological characterization and genetic analysis of Drechslera teres isolates
Provedor de dados: 74
Autores: Frazzon,A.P.G.; Matsumura,A.T.S.; Van Der Sand,S.T.
Net blotch, caused by the phytopathogen Drechslera teres, is a common disease of barley (Hordeum vulgare L) and is responsible for large economic losses in some barley growing areas. In this study the morphology and genetic variability of eight D. teres isolates from different regions of the Brazilian state of Rio Grande do Sul were investigated. Colony morphology was studied on potato-dextrose-agar (PDA) and genetic variability investigated using the random amplified polymorphic-DNA (RAPD) technique. 27 commercially available primers were tested of which 16 were selected for use in polymorphic analysis due to their good resolution and reproducibility. Similarity coefficients were used to construct dendrograms based on colony morphology and RAPD data...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Drechslera teres; Barley; Net blotch; DNA polymorphism; RAPD.
Ano: 2002
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572002000200019

The association of two single nucleotide polymorphisms (SNPs) in growth hormone (GH) gene with litter size and superovulation response in goat-breeds
Provedor de dados: 74
Autores: Zhang,Chunyan; Liu,Yun; Huang,Kunkun; Zeng,Wenbing; Xu,Deqing; Wen,Qunying; Yang,Liguo.
Two active mutations (A 781 G and A 1575 G) in growth hormone (GH) gene, and their associations with litter size (LS), were investigated in both a high prolificacy (Matou, n = 182) and a low prolificacy breed (Boer, n = 352) by using the PCR-RFLP method. Superovulation experiments were designed in 57 dams, in order to evaluate the effect of different genotypes of the GH gene on superovulation response. Two genotypes (AA and AB, CC and CD) in each mutation were detected in these two goat breeds. Neither BB nor DD homozygous genotypes were observed. The genotypic frequencies of AB and CC were significantly higher than those of AA and CD. In the third parity, Matou dams with AB or CC genotypes had significantly larger litter sizes than those with AA and CD (p...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: DNA polymorphism; Growth hormone (GH) gene; Litter size; Superovulation response; Goat.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572011000100010

Mark-recapture cloning: a straightforward and cost-effective cloning method for population genetics of single-copy nuclear DNA sequences in diploids
Provedor de dados: 5
Autores: Bierne, Nicolas; Tanguy, A; Faure, Michel; Faure, B; David, E; Boutet, I; Boon, E; Quere, N; Plouviez, S; Kemppainen, P; Jollivet, D; Moraga, D; Boudry, Pierre; David, P.
We describe a simple protocol to reduce the number of cloning reactions of nuclear DNA sequences in population genetic studies of diploid organisms. Cloning is a necessary step to obtain correct haplotypes in such organisms, and, while traditional methods are efficient at cloning together many genes of a single individual, population geneticists rather need to clone the same locus in many individuals. Our method consists of marking individual sequences during the polymerase chain reaction (PCR) using 5'-tailed primers with small polynucleotide tags. PCR products are mixed together before the cloning reaction and clones are sequenced with universal plasmid primers. The individual from which a sequence comes from is identified by the tag sequences upstream...
Tipo: Text
Palavras-chave: Sequence; Population genetics; High throughput allele recognition; DNA polymorphism.
Ano: 2007
URL: http://archimer.ifremer.fr/doc/2007/publication-4222.pdf

Mitochondrial DNA of Nellore and European x Nellore crossing cattle of high performance
Provedor de dados: 86
Autores: Curi,Rogério Abdallah; Mota,Lígia Souza Lima Silveira da; Silveira,Antônio Carlos.
The objective of this work was to evaluate, through a polymorphism in the ND5 gene of the bovine mitochondrial DNA, the frequency of Bos taurus indicus mtDNA individuals in a sample of Nellore purebred origin animals (n = 69) and crossbred animals originated from crosses of European sires and Nellore purebred origin females (n = 275). Only 2.26% (8/354) of the animals presented Bos taurus indicus mtDNA. The high frequency of Bos taurus taurus mtDNA in these animals can be a consequence of selection, once the animals studied are originated from selected lineages of high performance for meat production.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Bos taurus indicus; Bos taurus taurus; Beef cattle; DNA polymorphism.
Ano: 2007
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2007000800019

การใช้เทคนิค Simple sequence repeat (SSR) ตรวจ polymorphism ของ DNA ในข้าวโพด
Provedor de dados: 106
Autores: Chaba Jampatong; Chatpong Balla; Gunyavee Saipun.
12 ill., 3 tables
Palavras-chave: Corn; Maize; DNA polymorphism; SSR; ข้าวโพด; โพลีมอร์ฟิสซึม; ดีเอนเอ; เทคนิคเอสเอสอาร์; การสกัด.
Ano: 2004
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4212

Association of the heart fatty acid-binding protein gene with quality of carcass and meat traits in pigs
Provedor de dados: 45
Autores: Figueiredo,F.C.; Lopes,P.S.; Pinto,A.P.G.; Paiva,D.A.F.; Mendonça,P.T.; Guimarães,S.E.F.
The heart fatty acid-binding protein (HFABP) gene was sequenced in parental animals of a F2 crossing of boars of the Brazilian native Piau breed with commercial sows (Landrace x Large White Pietrain). Primers used for PCR were designed to amplify four exons of the gene. The PCR products were sequenced and compared with the GenBank sequences. Differences between the generated sequences and the GenBank sequences were observed for both genetic groups. A total of 246 F2 animals were genotyped using the Hinf I restriction enzyme. Two genotypes were identified, 198 being animals HH and 48 Hh. The Hinf I SNP was significantly associated with weights of loin (bone-in) (P&lt;0.05), jowl (P&lt;0.05), sirloin (P&lt;0.10), and kidneys (P&lt;0.01). These results showed...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Swine; Candidate gene; Molecular marker; DNA polymorphism; DNA sequencing.
Ano: 2008
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352008000200020

Genetic Diversity among Flue-cured Tobacco Cultivars Based on RAPD and AFLP Markers
Provedor de dados: 52
Autores: Zhang,Han Yao; Liu,Xiao Zhen; He,Chuan Sheng; Yang,Yu Ming.
The aim of this work was to study the genetic diversity among flue-cured tobacco cultivars. RAPD and AFLP analyses were used to assess the genetic similarity among selected accessions of flue-cured tobacco. Seventy eight RAPD and 154 AFLP polymorphic bands were obtained and used to assess the genetic diversity among 28 tobacco accessions. The cultivar relationships were estimated through the cluster analysis (UPGMA) based on RAPD data and AFLP data. The accessions were grouped into three major clusters and these shared common ancestry clustered together.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Flue-cured tobacco; RAPD; AFLP; Genetic diversity; DNA polymorphism.
Ano: 2008
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132008000600003

Polymorphisms of the low-density lipoprotein receptor gene in Brazilian individuals with heterozygous familial hypercholesterolemia
Provedor de dados: 56
Autores: Salazar,L.A.; Cavalli,S.A.; Hirata,M.H.; Diament,J.; Forti,N.; Giannini,S.D.; Nakandakare,E.R.; Bertolami,M.C.; Hirata,R.D.C.
Familial hypercholesterolemia (FH) is a metabolic disorder inherited as an autosomal dominant trait characterized by an increased plasma low-density lipoprotein (LDL) level. The disease is caused by several different mutations in the LDL receptor gene. Although early identification of individuals carrying the defective gene could be useful in reducing the risk of atherosclerosis and myocardial infarction, the techniques available for determining the number of the functional LDL receptor molecules are difficult to carry out and expensive. Polymorphisms associated with this gene may be used for unequivocal diagnosis of FH in several populations. The aim of our study was to evaluate the genotype distribution and relative allele frequencies of three...
Tipo: Info:eu-repo/semantics/other
Palavras-chave: Familial hypercholesterolemia; DNA polymorphism; Atherosclerosis; Genetics; LDL receptor.
Ano: 2000
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2000001100006