A5002520356- Animal Nutrition and Physiology
- Genetic and phenotypic traits in livestock
- Meat and Animal Product Quality
- Animal Behavior and Welfare Studies
- Livestock and Poultry Management
- Aquaculture Nutrition and Growth
- Animal Genetics and Reproduction
- Effects of Environmental Stressors on Livestock
- Fish biology, ecology, and behavior
- Mollusks and Parasites Studies
- Livestock Management and Performance Improvement
- Rural Development and Agriculture
- Genetics and Plant Breeding
- Agricultural and Food Sciences
- Insect and Pesticide Research
- Rabbits: Nutrition, Reproduction, Health
- Aquatic Invertebrate Ecology and Behavior
- Reproductive Physiology in Livestock
- Plant and animal studies
- Fatty Acid Research and Health
- Animal Ecology and Behavior Studies
- Milk Quality and Mastitis in Dairy Cows
- Insect and Arachnid Ecology and Behavior
- Genetic Mapping and Diversity in Plants and Animals
- Science and Education Research
Federal University of São João del-Rei
2013-2024
Universidade de São Paulo
2006-2016
Universidade do Estado de Santa Catarina
2009
Universidade Brasil
2006
The current research was conducted to estimate the heritability coefficients and genetic correlations for performance carcass body composition traits in a single sire broiler line. analyzed were BW at 38 d, ultrasound records of pectoral muscle depth, feed intake, conversion ratio, 42 d. eviscerated BW, breast weight, leg abdominal fat content, heart gizzard liver intestine weight. number observations varied between 4,120 29,040 each trait. (co)variance components, heritability, correlation...
Broiler meat quality is one of the primary factors considered by poultry industry. This study was conducted to estimate heritability and genetic correlation coefficients for traits in a single male broiler line. The ultimate pH (24 h after slaughter) lightness presented highest estimates. Given estimated correlations, measured at 15 min 24 slaughtering, as well lightness, were characterized close negative relationship with water holding capacity traits. In contrast, exhibited only...
O estudo dos parâmetros genéticos das características de qualidade carne aves permite à industria avícola se adequar às exigências da indústria processadora, aumentando sua eficiência, e melhorando a aceitação frango pelo mercado consumidor. Além disso, por meio do destes parâmetros, valiosas informações sobre caracterização fenômeno denominado PSE, que representa pálida, flácida exsudativa, podem ser obtidas, uma vez são escassos os estudos esse respeito em frangos. conhecimento...
Breast weight has great economic importance in poultry industry, and may be associated with other variables. This work aimed to estimate phenotypic correlations between performance (live body at 7 28 days, slaughter, depth of the breast muscle measured by ultrasonography), carcass (eviscerated leg weight) composition (heart, liver abdominal fat traits a broiler line, quantify direct indirect influence these on weight. Path analysis was used expanding matrix partial correlation coefficients...
1. The aim of this study was to investigate the associations between several carcass, performance and meat quality traits in broilers through factor analysis use latent variables (i.e. factors) as pseudo-phenotypes genetic evaluations.2. Factors were extracted using principal components method varimax rotation algorithm. Genetic parameters estimated via Bayesian inference under a multiple-trait animal model.3. All factors taken together explained 71% original variance data. first factor,...
Repeated measures from the same individual have been analyzed by using repeatability and finite dimension models under univariate or multivariate analyses. However, in last decade, use of random regression for genetic studies with longitudinal data become more common. Thus, aim this research was to estimate parameters body weight four experimental chicken lines models. Body hatching 84 days age (n = 34,730) free-range (7P, Caipirão da ESALQ, Caipirinha ESALQ Carijó Barbado) were used. The...
Inbreeding coefficient and milk traits in Holstein Jersey for percent fat, protein percentage (P = 0.479, 0.058 0.087, respectively).However, the PTAs yield fat decreased significantly after reaching inbreeding coefficients of 6.43 0.034) 5.75 0.007), respectively.The mean bulls was 6.45%; yield, protein, pounds, 15.04, 9.83 12.82% < 0.001, P 0.002, respectively).The linear regression only significant percentages breed 0.002 0.005, sires were more affected by smaller magnitudes than those...
Os parâmetros genéticos são ferramentas importantes para se conhecer melhor as características utilizadas nos programas de melhoramento genético e a avaliação do plano seleção empregado, permitindo o direcionamento das estratégias serem aplicadas. As desempenho carcaça vêm sendo como critério durante genética dos frangos, exemplo peso vivo, peito da conversão alimentar. Entretanto, algumas composição corporal trazendo entraves produção indústria avícolas, especialmente gordura coração....
The intense selection process for economic traits conducted by the poultry breeding programs has been caused several changes in broiler meat quality. A database belonging to a program of male line was used estimate heritability and genetic correlations feed conversion ratio quality traits, which were: initial final pH, lightness, drip loss, thawing loss shear force. Two-trait analyses were performed components co(variance) parameters determined using Bayesian approach GIBBS3F90 software....
The present research was conducted to estimate the genetic trends for meat quality traits in a male broiler line. analyzed were initial pH, pH at 6 h after slaughter, final range of falling lightness, redness, yellowness, weep loss, drip shrink and shear force. number observations varied between 618 2125 each trait. Genetic values obtained by restricted maximum likelihood, numerator relationship matrix had 107,154 animals. estimated regression average with respect unit time (generations),...
The goals of this research were to estimate the phenotypic correlations among various meat quality traits from a male broiler line and describe relation these variables. Phenotypical determined traits, isolating effects slaughter date, age mother sex. evaluated pH measurements taken at time 0 6 24 hours after slaughtering, color parameters, water loss due exudation, thawing cooking meat, shear force. Important associations (P<0.01) found be significant and, in most cases, weak or...
The growth rate of broilers has triplicated in the last decades. body weight is used as one selection criteria whereas carcass traits are valuable market requirements. Thus, meat industry like animals with high weights at slaughter and better traits. However, genetic relation several unknown. Therefore, we established associations among performance a broiler chicken line estimated gain trends. We also evaluated what age would lead to more efficient indirect data set information different...
The aim of the present study was to estimate heritabilities and evaluate existence genotype-environment interactions for growth curve parameters in quail fed diets containing different threonine:lysine ratios. A total 4,441 body weight information from two genetic groups (LF1 LF2) 0.66%, 0.71%, 0.76%, 0.81%, 0.86% ratios hatching 21 d age were evaluated. From 22 35 age, received a single diet. Gompertz model used parameters. Genetic analyses performed using random regression models, by...
como resistência a mudanças das práticas tradicionais familiares e carência de suporte técnico adequado, uma vez que os costumes são herdados junto com propriedade.
In causal relationship studies, the latent variables may summarize phenotypes in theoretical traits according to their phenotypic correlations, improving understanding of relationships between broilers phenotypes. this study, we aimed investigate potential among using a structural equation model context genetic analysis. The data used study comprised 14 with 2,017 records each, and 104,154 animals pedigree. Four (WEIGHT, LOSSES, COLOUR, VISCERA) were defined validated Bayesian Confirmatory...
Breast weight is one of the most economically important traits in poultry industry, but direct selection for expensive.The use ultrasonography enables vivo measurements broiler's breast muscle size, which may be much more feasible broiler selection.Previous studies broilers concluded that ultrasound and favorable meat production.According to previously obtained genetic parameters, could efficiently improved by muscle.The indirect does not affect body composition or quality broilers, despite...
ABSTRACT The aim was to estimate the heritabilities for accumulated weight gain between 60 and 90 days (WG1), 120 (WG2) 150 of age (WG3), pre‐slaughter body (PRE), meat‐to‐shell ratio (MS), carcass yield (CY) at first oviposition (AFO) in a population snails Cornu aspersum maximum . Single (for heritabilities) bi‐trait genetic correlations) analyses were performed using Bayesian inference. animal model included random effect systematic effects contemporary groups covariates. heritability...