Research Article

Related GMR Articles

01/27/2009
Cattle; Epigenetics; Genomic imprinting; IGF2; IGF2R; Nuclear transfer

Cloning by nuclear transfer is often associated with poor results due to abnormal nuclear reprogramming of somatic donor cells and altered gene expression patterns. We investigated the expression patterns of imprinted genes IGF2 and IGF2R in 33- to 36-day bovine embryos and chorio-allantoic membranes derived from in vivo- and in vitro-produced embryos by ... more

F. Perecin; S.C. Méo; W. Yamazaki; C.R. Ferreira; G.K.F. Merighe; F.V. Meirelles; J.M. Garcia
08/11/2006
BoLA; Bovine; Candidate genes; Cattle; Molecular markers; Tick resistance

Losses caused by bovine tick burdens in tropical countries have a tremendous economic impact on production systems. Besides reducing production, this parasite can cause death in the most susceptible animals. The use of commercial acaricides has been the major method of control, but their misuse has led to tick resistance to many chemicals. More recently, vaccines have been used in ... more

M.L. Martinez; M.A. Machado; C.S. Nascimento; M.V.G.B. Silva; R.L. Teodoro; J. Furlong; M.C.A. Prata; A.L. Campos; M.F.M. Guimarães; A.L.S. Azevedo; M.F.A. Pires; R.S. Verneque
08/07/2006
Candidate genes; Cattle; DGAT1; PCR-RFLP; Zebu

Recent reports identified DGAT1 (EC 2.3.1.20) harboring a lysine to alanine substitution (K232A) as a candidate gene with a strong effect on milk production traits. Our objective was to estimate the frequency of the DGAT1 K232A polymorphism in the main Zebu and Taurine breeds in Brazil as well as in Zebu x Taurine crossbreds as a potential QTL for marker-assisted selection ... more

G.A. Lacorte; M.A. Machado; M.L. Martinez; A.L. Campos; R.P. Maciel; R.S. Verneque; R.L. Teodoro; M.G.C.D. Peixoto; M.R.S. Carvalho; C.G. Fonseca
09/29/2009
Cattle; Effective population size; Inbreeding; Pigs; Sheep; Software

Genetic variation provides a basis upon which populations can be genetically improved. Management of animal genetic resources in order to minimize loss of genetic diversity both within and across breeds has recently received attention at different levels, e.g., breed, national and international levels. A major need for sustainable improvement and conservation programs is accurate ... more

E. Groeneveld; Bv.d. Westhuizen; A. Maiwashe; F. Voordewind; J.B.S. Ferraz
10/25/2011
Bovine; Cattle; Embryo; Sexing; Single cell; TSPY gene

The testis-specific protein Y-encoded gene (TSPY) is a Y-specific gene present in variable copy number in many mammalian species, including cattle. We tested the applicability of the TSPY gene as a Y-specific marker to predict preimplantation embryo sex in Nelore (Bos indicus) cattle. Two blastomeres were removed from each embryo. A total of 36 single ... more

M.C.A. Carneiro; P.L. Takeuchi; A. Araújo; R.B. Lôbo; F.P. Elias; R.A. Vila; C.L. Miranda-Furtado; E.S. Ramos
12/12/2011
Association; Cattle; Genotypic frequencies; meat quality; Mutation; Myogenic factor 5

Qualitative trait loci (QTL) for growth and meat quality traits in cattle (Bos taurus) have been previously mapped to three chromosome regions, 0 to 30, 55 to 70, and 70 to 80 cM on chromosome 5. We evaluated the allele frequencies and gene-specific single nucleotide polymorphisms (SNPs) of bovine myogenic factor 5 (MyF-5) in the QTL regions and their associations with live ... more

J.A. Ujan; L.S. Zan; S.A. Ujan; C. Adoligbe; H.B. Wang
10/27/2011
BLV testing; Bovine leukemia virus; Cattle; Leukosis; Native Iranian and Russian breeds; PCR

Bovine leukemia virus (BLV), the causative agent of enzootic bovine leukosis, is an exogenous, B lymphotropic retrovirus belonging to the Retroviridae family that induces persistent lymphocytosis in cattle and sheep. PCR has proven to be particularly suitable for investigating herds of cattle with a very low incidence of BLV infection and for clarifying doubtful serological results ... more

M.R. Mohammadabadi; M. Soflaei; H. Mostafavi; M. Honarmand
11/04/2011
Body measurement traits; Cattle; MyoG; Polymorphisms

Using PCR-SSCP and DNA sequencing technology, we examined the association of single nucleotide polymorphisms (SNPs) in the bovine MyoG gene with body measurement traits in 779 individuals of six native Chinese cattle breeds, namely Luxi, Luxi × Simmental crossbred, Nanyang, Xia’nan, Jiaxian red, and Qinchuan. A novel SNP, T314C, was detected. Allelic frequencies of MyoG- ... more

M. Xue; L.S. Zan; L. Gao; H.B. Wang
09/21/2011
Cattle; CYP21; Genotype-phenotype association; IGF2; SNPs

We analyzed two single nucleotide polymorphisms (SNPs) of the IGF2 and CYP21 genes in Nellore cattle participating in the Brazilian Animal Breeding Program. The SNPs were found in exon 6 of the IGF2 (insulin-like growth factor 2) gene (RFLP/MboII) as well as in the promoter region of the CYP21 (steroid 21-hydroxylase) gene (RFLP/HpaII) ... more

M. da Silva; A.F.L. Rios; E.S. Ramos; R.B. Lôbo; H.N. Oliveira; M.A.R. de Freitas
09/09/2011
ACOX1 gene; Cattle; PCR-SSCP; SNP; Ultrasound traits

Acyl-coenzyme A oxidase 1 (ACOX1) is the first enzyme in peroxisomal fatty acid β-oxidation; it is rate-limiting and plays a key role in fatty acid metabolism and fat deposition. ACOX1 is an important candidate gene for meat quality selection through marker-assisted selection. Genomic structural analysis showed that bovine ACOX1 shares 86% identity with human ACOX1. Using PCR-SSCP ... more

Y. Jiao; L.S. Zan; Y.F. Liu; H.B. Wang

Pages