Consulta: subjectFacets:"Frequencies"
Registros recuperados: 3
Data/hora: 10/06/2024 01:56:16

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 variability of 10 microsatellite markers in the characterization of Brazilian Nellore cattle (Bos indicus)
Provedor de dados: 74
Autores: Cervini,Marcelo; Henrique-Silva,Flávio; Mortari,Norma; Matheucci Jr,Euclides.
We assessed the polymorphism of 10 microsatellites in Brazilian Nellore cattle (Bos indicus) using a commercial multiplex system. Allele frequencies, polymorphism information content, heterozygosity and exclusion probability were calculated. Allele frequencies revealed that in the sample analyzed the markers were not equally polymorphic. The exclusion probabilities and the polymorphism information content of some loci in Nellore cattle were lower than in Bos taurus breeds. When all the microsatellites were considered the combined exclusion probability was 0.9989. This multiplex analysis can contribute toward pedigree information, adequate genetic improvements and breeding programs.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Alleles; Frequencies; Microsatellite; Nellore; Polymorphism; Zebu.
Ano: 2006
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572006000300015

Polymorphisms in MyoD1, MyoG, MyF5, MyF6, and MSTN genes in Santa Inês sheep
Provedor de dados: 86
Autores: Sousa Junior,Luis Paulo Batista; Meira,Ariana Nascimento; Azevedo,Hymerson Costa; Muniz,Evandro Nevez; Coutinho,Luiz Lehmann; Mourão,Gerson Barreto; Pedrosa,Victor Breno; Pinto,Luís Fernando Batista.
Abstract: The objective of this work was to sequence the MyoD1, MyoG, MyF5, MyF6, and MSTN genes and to identify polymorphisms in Santa Inês sheep (Ovis aries). A total of 192 lambs with 240 days of age were evaluated, and these genes were sequenced to be compared with the reference sequence in the Ovis aries genome. Genotype and allele frequencies were estimated, and the Hardy-Weinberg equilibrium was tested. Fragments containing 2,493 bp (MyoD1), 1,836 bp (MyoG), 2,813 bp (MyF5), 1,126 bp (MyF6), and 2,380 bp (MSTN) were obtained, and, in these sequences, 160 variants were identified. These polymorphisms were distributed as follows: 59 (MyoD1), 24 (MyoG), 63 (MyF5), 4 (MyF6), and 10 (MSTN). One hundred and four were novel polymorphisms, 45 in MyoD1, 2 in...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Ovis aries; Candidate genes; Frequencies; Variants.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2019000102810