Consulta: creatorFacets:"Pedrosa,Victor Breno"
Registros recuperados: 7
Data/hora: 11/06/2024 08:22:57

Estrutura populacional de rebanho fechado da raça Nelore da linhagem Lemgruber
Provedor de dados: 86
Autores: Oliveira,Priscila Silva; Santana Júnior,Mário Luiz; Pedrosa,Victor Breno; Oliveira,Elisângela Chicaroni de Mattos; Eler,Joanir Pereira; Ferraz,José Bento Sterman.
O objetivo deste trabalho foi determinar a estrutura populacional e os efeitos causados pela endogamia, em um rebanho fechado da raça Nelore da linhagem Lemgruber. O arquivo de pedigree avaliado incluiu registros de 39.290 animais, 17.646 machos e 21.644 fêmeas, nascidos entre 1951 e 2007. A estrutura da população foi analisada com uso dos programas Poprep e Endog, tendo-se determinado algum nível de endogamia em 61,82% dos animais. O valor do F médio foi 3,02% para toda a população e 4,89% para os animais endogâmicos; e o F máximo foi de 37,5%. O número de ancestrais que contribuiu para a população referência foi 2.380 animais, dos quais apenas sete explicam 50% da variabilidade genética da população. O número efetivo de fundadores (Nf) e o número efetivo...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Endogamia; Nelore Lemgruber; Tamanho efetivo populacional; Variabilidade genética.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2011000600010

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

Population structure and inbreeding of Holstein cattle in southern Brazil
Provedor de dados: 96
Autores: Sieklicki,Michelli de Fátima; Mulim,Henrique Alberto; Pinto,Luís Fernando Batista; Valloto,Altair Antônio; Pedrosa,Victor Breno.
ABSTRACT The present investigation aimed to evaluate the population structure and inbreeding of Holstein herds in southern Brazil. To carry out the analysis, the Associação Paranaense de Criadores de Bovinos da Raça Holandesa (APCBRH) in Brazil provided the data, which consisted of a pedigree file of 206,796 animals born between 1970 and 2014. Results regarding the following parameters were determined: pedigree integrity, effective number of founders, effective number of ancestors, generation interval, inbreeding coefficient, realized effective population size, and average relatedness coefficient. POPREP and ENDOG v.4.5 software packages were employed to estimate these parameters. Based on the data set, the mean generation interval was found to be 6.3...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Effective population size; Founders; Generation interval.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982020000100400

Genetic parameters for milk traits, somatic cell, and total bacteria count scores in Brazilian Jersey herds
Provedor de dados: 96
Autores: Sabedot,Mayara Andressa; Romano,Gabrieli de Souza; Pedrosa,Victor Breno; Pinto,Luís Fernando Batista.
ABSTRACT This study aimed to estimate the heritability of milk yield (MY), fat percent (F%), fat yield (FY), protein percent (P%), protein yield (PY), somatic cell score (SCS), and total bacterial count score (TBCS) as well as to estimate the genetic correlations among these traits, using a dataset from 5,918 lactations of Jersey cows in Brazil. The covariance components were estimated by restricted maximum likelihood using the PEST and VCE6 programs. The average values obtained for MY, F%, FY, P%, PY, SCS, and TBCS were 5017.5 kg, 4.3%, 192.3 kg, 3.3%, 173.0 kg, 5.9, and 2.9, respectively, while the heritability values were 0.16, 0.55, 0.18, 0.61, 0.25, 0.21, and 0.08, respectively. The genetic correlations ranged from low to high magnitude, with positive...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Genetic correlation; Heritability; Mastitis resistance; Selection.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982018000100408

Genetic parameters for type score traits and milk production in Brazilian Jersey herds
Provedor de dados: 96
Autores: Sabedot,Mayara Andressa; Romano,Gabrieli de Souza; Pedrosa,Victor Breno; Pinto,Luís Fernando Batista.
ABSTRACT This study aimed to estimate the heritability coefficients for ten functional type traits and milk production in the Jersey breed in Brazil, besides the genetic and phenotypic correlations between them. The present study utilised data from 1,567 records of linear type traits, including stature (ST), body depth (BD), loin strength (LS), rump width (RW), rump angle (RA), fore udder attachment (FUA), front teat placement (FTP), rear udder height (RUH), central ligament (CL), and final score (FS). Milk yield (MY) adjusted to 305 lactation days was also calculated. Covariance components were estimated by the restricted maximum likelihood approach using the PEST and VCE6 programs on the animal model. Heritability coefficients thus assessed were as...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Dairy cattle; Genetic correlation; Heritability; Selection.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982018000100409

Variants in GH, IGF1, and LEP genes associated with body traits in Santa Inês sheep
Provedor de dados: 63
Autores: Machado,Alessandro Lima; Meira,Ariana Nascimento; Jucá,Adriana de Farias; Azevedo,Hymerson Costa; Muniz,Evandro Neves; Coutinho,Luiz Lehmann; Mourão,Gerson Barreto; Pedrosa,Victor Breno; Pinto,Luís Fernando Batista.
ABSTRACT: Growth hormone (GH), insulin-like growth factor 1 (IGF1), and leptin (LEP) can be candidate genes for association studies because they play vital roles in the metabolism process. Thus, this study aimed to identify variants in these genes associated with body traits in Santa Inês sheep. The following were recorded: body weight at 100 (BW100) and 240 days (BW240), average daily gain (ADG), withers (WH) and croup (CH) heights, body length (BL), thoracic (TG) and leg (LG) girths, thoracic (TW) and croup (CW) widths, body depth (BD), rib eye area (REA), fat thickness (FT), and carcass finishing score (CFS). Single-locus association analysis was performed with 11 variants in IGF1, 18 in LEP, and 16 in GH. Moreover, two haplotypes in IGF1 and one...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Hormone; Carcass; Growth; Haplotype; Ovine.
Ano: 2021
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162021000300401

Glycerol inclusion levels in corn and sunflower silages
Provedor de dados: 64
Autores: Martins,Adriana de Souza; Oliveira,Juliane Ribeiro de; Lederer,Marili Lopes; Moletta,José Luís; Galetto,Shivelly Los; Pedrosa,Victor Breno.
Due to the seasonal cycle of forage, the use of silage to feed animals provides nutrients throughout the year. However, its quality can be improved with the inclusion of additives and other products. Glycerol is a rich source of energy and present a high efficiency of utilization by animals. The purpose of this work was to evaluate the effect of glycerol inclusion on the chemical and fermentation characteristics of corn and sunflower silages. Two silage sources (maize and sunflower) were used and four levels of glycerol inclusion (0, 15, 30 and 45%) based on dry matter were carried out. The experimental design was completely randomized in a 2 x 4 factorial arrangement with five replications. The pH values and chemical composition of corn and sunflower...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Crude glycerin; Biofuels; Dry matter; Fermentation quality; Conserved forage.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542014000500009