Consulta: subjectFacets:"Temperament"
Registros recuperados: 6
Data/hora: 13/06/2024 08:42:56

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

Reactivity, performance, color and tenderness of meat from Zebu cattle finished in feedlot
Provedor de dados: 96
Autores: Ribeiro,Julimar do Sacramento; Gonçalves,Tarcisio de Moraes; Ladeira,Márcio Machado; Tullio,Rymer Ramiz; Campos,Fabrício Rodrigues; Bergmann,José Aurélio Garcia; Machado Neto,Otávio Rodrigues; Carvalho,José Rodolfo Reis de.
The objective of this study was to study the animal reactivity and correlate it with performance and meat quality of cattle finished in feedlots. A total of 20 animals of the Tabapuã breed and 20 animals of the Nellore breed were confined for 112 days: 28 days of adaptation and 84 days of data collection. Performance was determined by the average daily weight gain (ADG) and average dry matter intake (DMI) estimated through the use of indicators. On the 1st, 42nd and 84th days of the experiment, two methods were used to measure the animal reactivity: animal reactivity in mobile cage and visual reactivity during handling. The characteristics of meat quality were evaluated by the color, shear force and pH24 after slaughter (pH24). Through the study of...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Bovine; Meat quality; Temperament.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982012000400025

Temperament and reproductive biology: emotional reactivity and reproduction in sheep
Provedor de dados: 96
Autores: Blache,Dominique; Bickell,Samantha L.
Reproductive capacity is controlled by a large number of factors such as season, social interactions and metabolic status. However, the influence of emotional reactivity on reproductive success has not been intensively investigated in farm animals. In this review, we define emotion reactivity and the expression of its inter individual variability named temperament. We briefly describe our protocol to measure temperament in sheep and discuss the heritability of temperament traits. Using the results obtained from our flock of sheep selected for calm or nervous temperament, we illustrate how this selection affects the reproductive biology from changing the inexperienced ewe's response to the male effect to improving lamb survival and ovulation rate. We...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Male effect; Ovulation; Sheep; Survival; Temperament.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982010001300044

Relationship between temperament with performance and meat quality of feedlot steers with predominantly Charolais or Nellore breed
Provedor de dados: 96
Autores: Silveira,Isabella Dias Barbosa; Fischer,Vivian; Farinatti,Luis Henrique Ebling; Restle,João; Alves Filho,Dari Celestino; Menezes,Luís Fernando Glasenapp de.
The relation between temperament with performance and meat quality was determined in 79 Charolais × Nellore steers kept in feedlot. Temperament was evaluated according to exit velocity, scale composite score and flight distance four times in the finishing phase, along with body weight, intake and feed conversion measures. Cattle were classified as calm, intermediate and excited according to exit velocity measures at the beginning of the trial. Excited cattle presented larger values for composite score and flight distance. Irrespective of genotype, excited cattle presented lower average daily gain, dry matter intake and worse feed conversion. Temperament categories did not affect most of beef quality traits, except for calm Bos indicus steers, which...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Cattle; Intake; Meat characteristics; Temperament; Weight gain.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982012000600022

Performance of Holstein-Zebu cows under partial replacement of corn by coffee hulls
Provedor de dados: 63
Autores: Tavares,Anamaria Almeida Costa; Pereira,Marcos Neves; Tavares,Marcelo Rodrigo; Chaves,Márcio Luiz.
Replacement of corn by citrus pulp or coffee hulls explores the potential of dairy cows to digest fiber-rich feedstuffs. However, for the State of Minas Gerais, Brazil, replacing citrus pulp by coffee hulls may reduce milk production costs, since citrus pulp needs to be imported from another state, while coffee hulls are highly available at essentially no cost. The objective of this experiment was to evaluate the performance of crossbred cows fed concentrates containing 25% coffee hulls (Coffee) or 25% citrus pulp (Pulp) as a replacement for ground corn grain (Corn; 47.4% in the concentrate). Forty-two cows were blocked based on milk yield and allocated to one of the three treatments for 56 days, following a 14-day standardization period. Concentrates were...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Brazil; Temperament; Citrus pulp; Crossbred cow; Byproduct.
Ano: 2005
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162005000200001