A5066658557- Genetic and phenotypic traits in livestock
- Genetic Mapping and Diversity in Plants and Animals
- Animal Nutrition and Physiology
- Genetics and Plant Breeding
- Livestock and Poultry Management
- Reproductive Physiology in Livestock
- Livestock Management and Performance Improvement
- Animal Genetics and Reproduction
- Effects of Environmental Stressors on Livestock
- Animal Behavior and Welfare Studies
- Research on Leishmaniasis Studies
- Cancer-related molecular mechanisms research
- Meat and Animal Product Quality
- Vector-borne infectious diseases
- Milk Quality and Mastitis in Dairy Cows
- Ruminant Nutrition and Digestive Physiology
- Soil Management and Crop Yield
- Rabbits: Nutrition, Reproduction, Health
- Aquaculture Nutrition and Growth
- Livestock Farming and Management
- Trypanosoma species research and implications
- Genetic diversity and population structure
- Toxin Mechanisms and Immunotoxins
- Parasites and Host Interactions
- Agronomic Practices and Intercropping Systems
Universidade Estadual Paulista (Unesp)
2016-2025
National Council for Scientific and Technological Development
2016-2024
Ministry of Science, Technology and Innovation
2018-2020
Departamento de Ciência e Tecnologia
2011
Brazilian Agricultural Research Corporation
2011
Universidade de Marília
1999
Runs of homozygosity (ROH) are continuous homozygous segments the DNA sequence. They have been applied to quantify individual autozygosity and used as a potential inbreeding measure in livestock species. The aim present study was (i) investigate genome-wide identify characterize ROH patterns Gyr dairy cattle genome; (ii) islands for gene content enrichment shared by more than 50% samples, (iii) compare estimates molecular calculated from (FROH), genomic relationship matrix approach (FGRM)...
Studies are being conducted on the applicability of genomic data to improve accuracy selection process in livestock, and genome-wide association studies (GWAS) provide valuable information enhance understanding genetics complex traits. The aim this study was identify regions genes that play roles birth weight (BW), weaning adjusted for 210 days age (WW), long-yearling 420 (LYW) Canchim cattle. GWAS were performed by means Generalized Quasi-Likelihood Score (GQLS) method using genotypes from...
The development of linkage disequilibrium (LD) maps and the characterization haplotype block structure at population level are useful parameters for guiding genome wide association (GWA) studies, understanding nature non-linear between phenotypes genes. elucidation can reduce information several single nucleotide polymorphisms (SNP) into a block, reducing number SNPs in coherent way consideration GWA genomic selection studies. maximum average LD, measured by r2 varied 0.33 to 0.40 distance <...
The objective of this study was to estimate genetic parameters for female mature weight (FMW), age at first calving (AFC), gain from birth 120 days (WG_B_120), 210 365 (WG_210_365), rib eye area (REA), back fat thickness (BF), rump (RF) and body scanning date (BWS) using single multiple-trait animal models by the REML method Nellore cattle data. estimates heritability ranged 0.163±0.011 WG_210_365 0.309±0.028 RF single-trait model 0.163±0.010 0.382±0.025 BWS model. correlations −0.35±0.08...
Whole-genome re-sequencing, alignment and annotation analyses were undertaken for 12 sires representing four important cattle breeds in Brazil: Guzerat (multi-purpose), Gyr, Girolando Holstein (dairy production). A total of approximately 4.3 billion reads from an Illumina HiSeq 2000 sequencer generated each animal 10.7 to 16.4-fold genome coverage. 27,441,279 single nucleotide variations (SNVs) 3,828,041 insertions/deletions (InDels) detected the samples, which 2,557,670 SNVs 883,219 InDels...
The objectives of this paper were to identify the phenotypic egg-laying patterns in a White Leghorn line mainly selected for egg production, estimate genetic parameters traits related production and evaluate association between these by principal components analysis trait(s) that could be used as selection criteria improve production. Records 54 wk from population used. data set contained records length:width ratio eggs at 32, 37, 40 age; weight BW 62 age first egg; early partial rate 17 30...
The aim of this study was to assess genome-wide autozygosity in a Nellore cattle population and characterize ROH patterns islands that may have occurred due selection within its lineages. It attempts also compare estimates inbreeding calculated from (FROH), genomic relationship matrix (FGRM), pedigree-based coefficient (FPED).The average number per animal 55.15 ± 13.01 with an size 3.24 Mb. genome is composed mostly by high shorter segments accounting for 78% all ROH, although the proportion...
Chicken feed efficiency (FE) traits are the most important economic in broiler production. Several studies evaluating genetic factors affecting food consumption chickens available. However, of these identified genomic regions containing putative quantitative trait loci for each separately. It is still a challenge to find common gene networks related traits. Therefore, here, genome-wide association study (GWAS) was conducted explore candidate responsible Feed Intake (FI), Body Weight Gain...
Abstract Natural and artificial selection in domesticated animals can cause specific changes genomic regions known as signatures. Our study used the integrated haplotype score (iHS) Tajima’s D tests within non-overlapping windows of 100 kb to identify signatures, addition genetic diversity linkage disequilibrium estimates 9498 sheep from breeds Ireland (Belclare, Charollais, Suffolk, Texel, Vendeen). The mean observed expected heterozygosity for all were 0.353 0.355, respectively. Suffolk...
Stayability is a trait that has large impact on the costs of rural properties because it directly related to cow's ability produce certain number calves over given period time. Thus, objective this study was estimate genetic variance stayability (STAY) and its associations with age at first calving (AFC), body weight males females 420 days (BW420), scrotal circumference (SC420), in order provide support for evaluation program Canchim beef cattle. Genetic parameters were estimated by Bayesian...
Animal temperament is a trait of economic relevance and its use as selection criterion requires the identification environmental factors that influence this trait, well estimation genetic variability interrelationship with other traits. The objectives study were to evaluate effect covariates dam age at calving (ADC), long yearling (YA) weight (YW) on score (T) estimate parameters for T, scrotal circumference (SC) YA first (AFC) in Nellore cattle participating program. traits analyzed by...
Phenotypic data from female Canchim beef cattle were used to obtain estimates of genetic parameters for reproduction and growth traits using a linear animal mixed model. In addition, relationships among estimated breeding values (EBVs) these explored principal component analysis. The studied in age at first calving (AFC), second (ASC), interval (CI), bodyweight 420 days (BW420). heritability AFC, ASC, CI BW420 0.03±0.01, 0.07±0.01, 0.06±0.02, 0.24±0.02, respectively. correlations AFC with...
Genomic regions under high selective pressure present specific runs of homozygosity (ROH), which provide valuable information on the genetic mechanisms underlying adaptation to environment imposed challenges. In broiler chickens, conventional production systems in tropical environments lead animals with favorable genotypes be naturally selected, increasing frequency these alleles next generations. this study, ~1400 chickens from a paternal line were genotyped 600 K Affymetrix® Axiom®...
In beef cattle, growth, reproductive, and carcass traits have been studied for improving productivity quality of meat products. The aim this study was to estimate genetic parameters birth (BW), weaning (WW) yearling (YW) weights, scrotal circumferences at (SCW) (SCY), age first calving (AFC), ribeye area (REA) back fat thickness (BFT) in order provide support the evaluation program composite Canchim breed. Data on 12 967 7481 (WW), 5131 (YW), 1447 (SCW), 1224 1400 2082 (REA BFT) animals were...
This study investigated the feasibility of using easy-to-measure phenotypic traits to predict sheep resistant, resilient, and susceptible gastrointestinal nematodes, compared classification performance multinomial logistic regression (MLR), linear discriminant analysis (LDA), random forest (RF), artificial neural network (ANN) methods, evaluated applicability best model on each farm. The database comprised 3654 records 1250 Santa Inês from 6 farms. animals were classified into resistant...
The objective of this work was to study growth and body nutrient deposition profiles male female Cobb Ross broilers using Gompertz equations. A total number 1,920 one- 56-day-old were used. randomized experimental design in a factorial arrangement (2 strains x 2 sex), with 4 replicates 120 birds each, applied. Diets formulated supply the requirements recommended by genetic companies. sample weekly weighed sacrificed after 24 hours fasting. Carcasses de-feathered again. parameters equation...
Summary Age at first calving (AFC) measures the entry of heifers into beef cattle production system. This trait can be used as a selection criterion for earlier reproductive performance. Using data from Nelore participating in 'Program Genetic Improvement Breed' (PMGRN-Nelore Brazil), bi-trait analyses were performed using restricted maximum likelihood method, based on an AFC animal model and following traits: female body weight adjusted to 365 (BW365) 450 (BW450) days age, male scrotal...
Neural networks are capable of modeling any complex function and can be used in the poultry animal production areas. The aim this study was to investigate possibility using neural on an egg data set fitting models curve by applying 2 approaches, one a nonlinear logistic model other artificial network [multilayer perceptron (MLP) radial basis function]. Two sets from generations White Leghorn strain that had been selected mainly for were used. In first set, mean weekly egg-laying rate...