Research Article

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Body measurement; Genetic variability; meat quality; Single nucleotide polymorphism; SIRT2

Silent information regulator 2 (SIRT2), a member of the Sirtuin family of class III nicotinamide adenine dinucleotide-dependent protein deacetylases, plays an important role in senescence, metabolism, and apoptosis. This study was conducted to detect potential polymorphisms of the bovine SIRT2 gene and explore their relationships with meat quality and body measurement traits ( ... more

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Cyclin-dependent kinase 6 (CDK6) is a key element of D-type cyclin holoenzymes. It is involved in the regulation of the G1-phase of the cell cycle and is considered to be an important candidate gene for selection of body measurement traits through marker-assisted selection. We cloned the promoter sequence of this gene in bovines and found it to share high similarity with that of the human ... more

Y.F. Liu; L.S. Zan; W.T. Cui; Y.P. Xin; Y. Jiao; K. Li
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Body measurement; LYRM1; Meat quality traits; Qinchuan cattle; Single nucleotide polymorphism

Body measurement and meat quality traits play important roles in the evaluation of productivity in cattle; they are influenced by genetic and environmental factors. Recent studies have shown that LYRM1 is a novel gene related to obesity and may influence fat deposition. We screened for new polymorphisms in the bovine LYRM1 gene and analyzed their association with body measurement and meat ... more

Y.K. Li; Y.F. Huangpu; J.B. Gao; N. Yang; C.Z. Fu; H.B. Wang; G. Cheng; L.S. Zan
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Bipolaris sorokiniana; Genetic variability; RAPD; Wheat

Isolates of Bipolaris sorokiniana were analyzed by random-amplified polymorphic DNA (RAPD) techniques to determine the amount of intraspecific genetic variability and to study host-pathogen interactions. Ten isolates originated from different regions of Brazil were examined. Plants of the wheat cultivars BR8, BH1146 (original host) and IAC-5 Maringá, classified as resistant ... more

A.T.S. Matsumura; A.M. Prestes; S.T. Van Der Sand; A.M.R. de Oliveira
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Argentine Creole; Genetic variability; Heterozygosity; Horses; Serum protein polymorphysm; Thoroughbred

Genetic polymorphism was analyzed for five blood proteins: albumin - Al, esterase - Es, α1B-glycoprotein - Xk, transferrin - Tf and hemoglobin - Hb in 200 Thoroughbred (TB) and 124 Argentine Creole (AC) horses. Of the five systems examined, Tf and Hb were not in Hardy-Weinberg equilibrium in either breed and Es was not in equilibrium in the Creole breed. Genetic ... more

S. Díaz; F.N. Dulout; P. Peral-García
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Gene flow; Genetic variability; Mating strategies; Nellore; Population structure

Parameters based on the probability of gene origin were used to describe genetic variability in three reproductive groups from the Breeding Program for Nellore Cattle (PMGRN). The three reproductive populations (cows in reproductive age, bulls from artificial insemination centers and young bulls in progeny test) generated medium to low values. The effective number of founders (N ... more

P.A. Vozzi; C.R. Marcondes; L.A.F. Bezerra; R.B. Lôbo
10/05/2007
Genetic variability; Pomacentridae; Pomacentrinae; Random amplified polymorphic DNA; Stegastes

The family Pomacentridae comprises about 326 species belonging to 28 genera. The genus Stegastes is composed of nearly 33 species, and 8 are endemic to the Brazilian Province, inhabiting the Brazilian coast (Stegastes fuscus, S. variabilis, S. leucosticus, S. uenfi, and S. pictus) or Western Atlantic oceanic islands (S. trindadensis ... more

E.A. Dias; A.S. Souza; W.F. Molina
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Genetic variability; Microsatellites; Nuclear molecular markers; Population structure; Wading bird

Roseate Spoonbills (Platalea ajaja, Linnaeus) are wading birds present in two of the most important Brazilian wetlands: the Pantanal wetlands and Rio Grande do Sul marshes. Natural populations of these species have not been previously studied with variable nuclear molecular markers. In order to support decision making regarding the management and conservation of these populations, we ... more

C.I. Miño; S.N. Del Lama
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Genetic heterogeneity; Genetic variability; Ochlerotatus taeniorhynchus; Polymorphic microsatellite loci; Venezuelan equine encephalitis virus

In Colombia, the mosquito Ochlerotatus taeniorhyn­chus has been identified as an efficient vector of the epidemic-epi­zootic Venezuelan equine encephalitis virus. We evaluated the ge­netic variability and heterogeneity of this mosquito in Colombian populations using eight microsatellite DNA loci. Two hundred and ten mosquito specimens collected from seven populations of the Co­ ... more

F. Bello; V. Becerra
06/02/2009
Genetic variability; Internal transcribed spacer; Melipona quinquefasciata; nuclear ribosomal DNA; Stingless bee

Melipona quinquefasciata is a ground-nesting South American stingless bee whose geographic distribution was believed to comprise only the central and southern states of Brazil. We obtained partial sequences (about 500-570 bp) of first internal transcribed spacer (ITS1) nuclear ribosomal DNA from Melipona specimens putatively identified as M. quinquefasciata collected ... more

J.O.P. Pereira; B.M. Freitas; D.M.M. Jorge; D.C. Torres; C.E.A. Soares; T.B. Grangeiro

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