Consulta: creatorFacets:"Parra-Bracamonte,Gaspar Manuel"
Registros recuperados: 6
Data/hora: 04/06/2024 15:47:48

Assessment of genetic structure in Mexican charolais herds using microsatellite markers
Provedor de dados: 69
Autores: Sifuentes-Rincón,Ana María; Puentes-Montiel,Herlinda; Parra-Bracamonte,Gaspar Manuel.
Knowledge of livestock genetic diversity is an essential step to respond to commercial demands and reach production objectives in different environments and production systems. The evaluation of animal genetic diversity is achieved by using molecular markers. Microsatellites are the most used markers for studies of this type. Eleven microsatellites were used to evaluate the genetic variation from three populations of Charolais cattle located in northeast Mexico. The studied populations exhibited a high allelic variability with a mean heterozygosity of 0.5. A moderate genetic differentiation between the Charolais populations (F ST = 0.079; P &lt; 0.001) was observed. This suggests subdivisions in Charolais breed established in Mexico, due to genetic...
Tipo: Journal article
Palavras-chave: Charolais; Genetic diversity; Microsatellite.
Ano: 2007
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582007000400002

Inbreeding evidence in a traditional channel catfish (Ictalurus punctatus) hatchery in Mexico
Provedor de dados: 69
Autores: Parra-Bracamonte,Gaspar Manuel; Sifuentes-Rincón,Ana María; Rosa-Reyna,Xochitl Fabiola De la; Arellano-Vera,Williams; Sosa-Reyes,Brenda.
Background: Channel catfish are one of the most important aquaculture species raised for food purposes in Mexico. Two temporal samples were obtained from the largest channel catfish breeding hatchery in Mexico to identify changes in genetic diversity and inbreeding that are promoted by traditional hatchery management. Results: The genetic parameter analysis of 11 microsatellite loci showed no significant change in genetic diversity (p &amp;gt; 0.05). However, a significant heterozygosis deficiency was detected (p &lt; 0.001), and genetic structure analysis indicated moderate differentiation between the temporally divided populations (F ST = 0.08). A moderate level of inbreeding and a slight increase of the inbreeding coefficient from 0.23 to 0.27 were the...
Tipo: Journal article
Palavras-chave: Channel catfish; Effective population size; Genetic diversity; Inbreeding.
Ano: 2011
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582011000600011

Meat tenderness genetic polymorphisms occurrence and distribution in five Zebu breeds in Mexico
Provedor de dados: 69
Autores: Parra-Bracamonte,Gaspar Manuel; Martínez-González,Juan C; Sifuentes-Rincón,Ana M; Moreno-Medina,Victor R; Ortega-Rivas,Eligio.
Background The Zebu cattle are represented by a diverse group of breeds in México. Traditionally these breeds have been associated with the tough beef characteristic. Validated genetic markers have the potential to be included in marker-assisted selection and management programs in order to improve traits such as beef tenderness. The incidence and distribution of Calpain and Calpastatin polymorphisms strongly associated with beef tenderness were estimated in registered cattle of five Zebu breeds in Mexico. Results A low and in some cases null frequency of favorable C allele of CAPN316 was determined in all breeds. Conversely, a more equilibrated frequency in CAPN4751 and CAST loci was observed. Conclusions Although the relatively low occurrence of...
Tipo: Journal article
Palavras-chave: Calpain; Calpastatin; Frequencies; Genotype; SNP.
Ano: 2015
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582015000500007

Genetic diversity of tyrosine hydroxylase (TH) and dopamine b-hydroxylase (DBH) genes in cattle breeds
Provedor de dados: 74
Autores: Lourenco-Jaramillo,Diana Lelidett; Sifuentes-Rincón,Ana María; Parra-Bracamonte,Gaspar Manuel; Rosa-Reyna,Xochitl Fabiola de la; Segura-Cabrera,Aldo; Arellano-Vera,Williams.
DNA from four cattle breeds was used to re-sequence all of the exons and 56% of the introns of the bovine tyrosine hydroxylase (TH) gene and 97% and 13% of the bovine dopamine b-hydroxylase (DBH) coding and non-coding sequences, respectively. Two novel single nucleotide polymorphisms (SNPs) and a microsatellite motif were found in the TH sequences. The DBH sequences contained 62 nucleotide changes, including eight non-synonymous SNPs (nsSNPs) that are of particular interest because they may alter protein function and therefore affect the phenotype. These DBH nsSNPs resulted in amino acid substitutions that were predicted to destabilize the protein structure. Six SNPs (one from TH and five from DBH non-synonymous SNPs) were genotyped in 140 animals; all of...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Behavior; B. t. indicus; B. t. taurus; Catecholamine; Temperament.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572012000300009

Influence of temperament-related genes on live weight traits of Charolais cows
Provedor de dados: 96
Autores: Garza-Brenner,Estela; Sifuentes-Rincón,Ana María; Rodríguez-Almeida,Felipe Alonso; Randel,Ronald D.; Parra-Bracamonte,Gaspar Manuel; Arellano-Vera,Williams.
Abstract We investigated whether a panel of molecular markers previously associated with temperament has an effect on live growth traits. Phenotypic data from 412 Charolais cows categorized according to their age in adult and young cows were used to determine Pearson's correlations between birth (BW), weaning (WW), and yearling live (YW) weight and temperament traits (measured as exit velocity [EV] and temperament score [TS]). For association analysis, selective genotyping of a group of 80 cows identified as the most docile and temperamental were genotyped with a 151-SNP (single-nucleotide polymorphisms) panel of molecular markers previously associated with temperament. Significant Pearson's correlations between birth weight and weaning weight and the two...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Beef cattle; Behavior; Body weight; Candidate genes; SNP; Temperament.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982020000100401

Signatures of Selection From Candidate Gene Polymorphisms Panel in Five Zebu Breeds
Provedor de dados: 52
Autores: Parra-Bracamonte,Gaspar Manuel; Martinez-Gonzalez,Juan Carlos; Sifuentes-Rincón,Ana María; Rosa-Reyna,Xochitl Fabiola la.
ABSTRACT The signals of selection using candidate genes polymorphism were studied in five zebu breeds of Mexico. Three loci from GHRH and complementarily Steroyl Co Desaturase F762, Dopamine Beta Hydroxilase 17299, and LEP3272 were identified under selection. Findings depict Zebu selection pressure mainly on Brahman breed resulting in a divergent structure pattern.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Cattle; Population structure; PCA; Selection signals.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132018000100442