Research Article

Related GMR Articles

05/31/2011
Conservation; Genetic diversity; Microsatellites; Pelodiscus sinensis

Twenty-one novel polymorphic microsatellite loci were isolated from the Chinese soft-shelled turtle, Pelodiscus sinensis (Trionychidae). This is a commonly consumed Asian species, especially in China, where it is reared in large numbers on farms. We screened 34 unrelated individuals from Wuhu of Anhui province in China and detected high levels of polymorphism for all 21 loci, ... more

X.J. Bu; L. Liu; L. Wang; L.W. Nie
04/26/2011
Conservation; Genetic variation; Microsatellites; RAMs; Scleropages formosus

Malaysian arowana (dragonfish; Scleropages formosus) is an ancient osteoglossid fish from southeast Asia. Due to the high demand of the ornamental fish trade and because of habitat loss, the species is close to extinction. We isolated and characterized 10 polymorphic microsatellites of this species, using 5'-anchored PCR. The number of alleles at the 10 microsatellite loci ranged ... more

B. Manoharan; Z. Sulaimen; F. Omar; R.Y. Othman; S.Z. Mohamed; S. Bhassu
05/24/2011
AMOVA; Conservation; Endemism; Genetic diversity; Molecular markers

The bristle-spined porcupine, Chaetomys subspinosus, an endemic rodent from Atlantic Forest, was considered to be abundant in the recent past, but population reductions due to habitat loss and expansion of human activities caused this species to be included in the “vulnerable” category of the World Conservation Union Red List. We performed the first genetic assessment in natural ... more

C.G. Oliveira; R.A. Martinez; G.A.F. Giné; D.M. Faria; F.A. Gaiotto
04/12/2011
Conservation; Feature selection; Genetic algorithm; Information gain; Pre-miRNA

In order to classify the real/pseudo human precursor microRNA (pre-miRNAs) hairpins with ab initio methods, numerous features are extracted from the primary sequence and second structure of pre-miRNAs. However, they include some redundant and useless features. It is essential to select the most representative feature subset; this contributes to improving the classification ... more

P. Xuan; M.Z. Guo; J. Wang; C.Y. Wang; X.Y. Liu; Y. Liu
03/29/2011
Class imbalance; Conservation; Information gain; Pre-miRNA; Sample selection

To solve the class imbalance problem in the classification of pre-miRNAs with the ab initio method, we developed a novel sample selection method according to the characteristics of pre-miRNAs. Real/pseudo pre-miRNAs are clustered based on their stem similarity and their distribution in high dimensional sample space, respectively. The training samples are selected according to the ... more

K. Han
10/26/2010
Coefficient of similarity; Conservation; genetic breeding; Genetic variability; Grouping analyses; Molecular marker

In spite of the importance of and the considerable variability observed in Passiflora (Passifloraceae), little is known about the genetic diversity of most of the species of this genus. We evaluated the genetic diversity by RAPD markers in 18 genotypes of Passiflora trintae. The 15 primers generated 112 markers, 84% of which were polymorphic. The genetic distance ... more

C.B.M. Cerqueira-Silva; C.B. Cardoso-Silva; E.S.L. Santos; L.D.H.C.S. Conceição; A.S. Pereira; A.C. Oliveira; R.X. Corrêa
06/22/2010
Conservation; MicroRNAs; Target genes; Wheat

MicroRNAs (miRNAs) are non-coding small RNAs that regulate gene expression by translational repression or transcript degradation. A large number of miRNAs have been identified from model plant species; however, the character of conserved miRNAs is poorly understood. We studied 42 miRNA families that are conserved within the plant kingdom, using the miRBase database. Some conserved miRNA ... more

Z.J. Yin; F.F. Shen
11/26/2013
Conservation; Effective size; Genetic structure; Lobeira; Population genetics

The inbreeding effective population size is an estimate of inbreeding and genetic drift in populations. It is an important tool for conservation genetics because it represents the number of individuals that are effectively contributing alleles to the subsequent generations. Several studies have been published in the last decades on the genetic structure of natural plant populations of the ... more

T.M. Moura; M.V.B.M. Siqueira; G.C.X. Oliveira
09/12/2013
Cerrado; Conservation; Genetic variability; Germplasm; Multivariate techniques

The fragmentation of the original vegetation of the Cerrado biome, caused by the expansion of agricultural areas, mainly in central-west Brazil, calls for an assessment of the native population of this vegetation, especially of the species of interest for domestication and sustainable use. The purpose of this study was to characterize the genetic diversity of 140 gabiroba mother plants ( ... more

E.S. de Assis; E.Fdos Reis; J.F.N. Pinto; L.A.S. Contim; L.A.S. Dias
09/10/2013
Conservation; Genetic diversity; Meliponini tribe; Microsatellite markers; Pollinators; Recôncavo Baiano

Bees play a key role in pollination and thereby help maintain plant diversity. The stingless bee Melipona scutellaris is an important pollinator in northeastern Brazil because it is endemic to this region. Both deforestation and timber harvesting have reduced the nesting sites for this species, thus reducing its population and range. Genetic studies may help reverse this process ... more

J.L. Viana; A.K. Francisco; C.A.L. Carvalho; A.M. Waldschmidt

Pages