A5076870658- Genetic and phenotypic traits in livestock
- Genetic Mapping and Diversity in Plants and Animals
- Meat and Animal Product Quality
- Genetics and Plant Breeding
- Effects of Environmental Stressors on Livestock
- Cancer-related molecular mechanisms research
- Reproductive Physiology in Livestock
- Livestock Management and Performance Improvement
- Ruminant Nutrition and Digestive Physiology
- Animal Nutrition and Physiology
- Livestock Farming and Management
- Animal Behavior and Welfare Studies
- Muscle Physiology and Disorders
- Animal Nutrition and Health
- Agricultural Systems and Practices
- Birth, Development, and Health
- Agriculture and Rural Development Research
- Peroxisome Proliferator-Activated Receptors
- Animal Genetics and Reproduction
- Natural Products and Biological Research
Universidade Federal de Santa Maria
2023-2024
Universidade de São Paulo
2019-2024
Animal Production Institute
2022
Universidade Estadual Paulista (Unesp)
2013-2021
Abstract Background Knowledge of the linkage disequilibrium (LD) between markers is important to establish number necessary for association studies and genomic selection. The objective this study was evaluate extent LD in Nellore cattle using a high density SNP panel 795 genotyped steers. Results After data editing, 446,986 SNPs were used estimation LD, comprising 2508.4 Mb genome. mean distance adjacent 4.90 ± 2.89 kb. minor allele frequency (MAF) less than 0.20 considerable proportion...
The objective of this study was to identify genomic regions that are associated with meat quality traits in the Nellore breed. steers were finished feedlots and slaughtered at a commercial slaughterhouse. This analysis included 1,822 phenotypic records tenderness 1,873 marbling records. After control, 1,630 animals genotyped for tenderness, 1,633 marbling, 369,722 SNPs remained. results reported as proportion variance explained by windows 150 adjacent SNPs. Only largest effects considered....
Saturated fatty acids can be detrimental to human health and have received considerable attention in recent years. Several studies using taurine breeds showed the existence of genetic variability thus possibility improvement acid profile beef. This study identified regions genome associated with saturated, mono- polyunsaturated acids, n-6 n-3 ratios Longissimus thoracis Nellore finished feedlot, single-step method. The results that 115 windows explain more than 1 % additive variance for 22...
Fatty acid type in beef can be detrimental to human health and has received considerable attention recent years. The aim of this study was identify differentially expressed genes longissimus thoracis muscle 48 Nellore young bulls with extreme phenotypes for fatty composition intramuscular fat by RNA-seq technique. Differential expression analyses between animals phenotype showed a total 13 myristic (C14:0), 35 palmitic (C16:0), 187 stearic (C18:0), 371 oleic (C18:1, cis-9), 24 conjugated...
The objective of this study was to evaluate the accuracy genomic predictions for rib eye area (REA), backfat thickness (BFT), and hot carcass weight (HCW) in Nellore beef cattle from Brazilian commercial herds using different prediction models. Phenotypic data 1756 steers ten Brazil were used. Animals offspring 294 sires 1546 dams, reared on pasture, feedlot finished, slaughtered at approximately 2 years age. All animals genotyped a 777k Illumina Bovine HD SNP chip. Accuracy breeding values...
Abstract The aim was to conduct a weighted single‐step genome‐wide association study detect genomic regions and putative candidate genes related residual feed intake, dry matter efficiency (FE), conversion ratio, body weight gain, intake gain in Nellore cattle. Several protein‐coding were identified within the that explain more than 0.5% of additive genetic variance for these traits. These associated with insulin, leptin, glucose, protein lipid metabolisms; energy balance; heat oxidative...
Carcass traits measured after slaughter are economically relevant in beef cattle. In general, the house payment system is based on HCW. Ribeye area (REA) associated with amount of meat carcass, and a minimum backfat thickness (BFT) necessary to protect carcass during cooling. The aim this study was identify potential genomic regions harboring candidate genes affecting those Nellore data set used present consisted 1,756 males phenotype records. A subset 1,604 animals had both genotypic...
The objective of this study was to determine whether visual scores used as selection criteria in Nellore breeding programs are effective indicators carcass traits measured after slaughter. Additionally, evaluated the effect different structures relationship matrix ( and ) on estimation genetic parameters prediction accuracy values. There were 13,524 animals for conformation (CS), finishing precocity (FP), muscling (MS) 1,753, 1,747, 1,564 LM area (LMA), backfat thickness (BF), HCW,...
Traditional single nucleotide polymorphism (SNP) genome-wide association analysis (GWAA) can be inefficient because SNPs provide limited genetic information about genomic regions. On the other hand, using haplotypes in statistical may increase extent of linkage disequilibrium (LD) between and causal variants also potentially capture epistastic interactions within a haplotyped locus, providing an power robustness studies. We performed GWAA (413,355 SNP markers) based on variable-sized sliding...
The aim of this study was to estimate genetic and phenotypic associations growth traits with carcass meat in Nellore cattle.Data from male female animals were used for weaning weight (WW; N = 241,416), yearling (YW, 126,596), gain (GWY, 78,687), hip height (YHH, 90,720), respectively; 877 hot (HCW) 884 longissimus muscle area (LMA), backfat thickness (BT), marbling score (MS), shear force (SF).The variance components estimated by the restricted maximum likelihood method using three-trait...
Subcutaneous fat deposition measured as backfat thickness (BFT) increases protection for the bovine carcass during cooling, conferring to BFT an important characteristic meat industry. To study influence of on quality traits Nellore bulls (Bos indicus), data from 1652 animals aged 20–24 months in feedlot finishing were used. The principal component analysis (PCA) was performed characterise variables longissimus thoracis muscle. Measurements comprised rib eye area, BFT, marbling, shear force,...
Abstract The objective of this study was to obtain (co)variance components, heritability, and genetic phenotypic correlation estimates for feed efficiency behaviour‐related indicator traits. Further, it aimed predict the direct correlated responses traits when selection applied feeding in Nelore cattle. Phenotypic records ( n = 4840 ) from 125 tests (RFI: Residual intake DMI: Dry matter intake) carried out between 2011 2018 were considered study. Animals belonged five farms located two...
Given the economic relevance of fertility and reproductive traits for beef cattle industry, investigating their genetic background developing effective breeding strategies are paramount. Considering late sex-dependent phenotypic expression, genomic information can contribute to speed up rates progress per year. In this context, main objectives study were estimate variance components parameters, including heritability correlations, fertility, female precocity, semen production quality...
The objective of this study was to estimate genetic parameters for carcass and meat quality traits, as well their correlations using pedigree genomic information. A total 3,716; 3,702; 3,439; 3,705; 3,714 records 12th–13th rib LM area (LMA), backfat thickness (BF), HCW, marbling score (MARB), Warner–Bratzler peak shear force (WBSF), respectively, were used. Animals genotyped with BovineHD BeadChip GeneSeek Genomic Profiler Indicus HD - GGP75Ki panel. (co)variance components estimated by...
Abstract The aim of this study was to evaluate the relationship between temperament in Nellore bulls with carcass and meat quality traits. In total, 1,400 were studied, assessed using two measurements: movement score (MOV) flight speed test (FS). Both MOV FS measured at time points, background (MOVb FSb) yearling age, ~550 d after birth, preslaughter (MOVps FSps) end feedlot period. change resulting an increase or decrease reactivity also used measure quality. traits define included bruises...
Summary Brazilian beef cattle are raised predominantly on pasture in a wide range of environments. In this scenario, genotype by environment (G×E) interaction is an important source phenotypic variation the reproductive traits. Hence, evaluation G×E interactions for heifer’s early pregnancy (HP) and scrotal circumference (SC) traits Nellore cattle, belonging to three breeding programs, was carried out determine animal’s sensitivity environmental conditions (EC). The dataset consisted 85 874...
Summary This study aimed to assess the predictive ability of different machine learning (ML) methods for genomic prediction reproductive traits in Nellore cattle. The studied were age at first calving (AFC), scrotal circumference (SC), early pregnancy (EP) and stayability (STAY). numbers genotyped animals SNP markers available 2342 321 419 4671 309 486 2681 319 619 (STAY) 3356 108 (EP). Predictive support vector regression (SVR), Bayesian regularized artificial neural network (BRANN) random...
Abstract The aim of this study was to compare the predictive performance Genomic Best Linear Unbiased Predictor (GBLUP) and machine learning methods (Random Forest, RF; Support Vector Machine, SVM; Artificial Neural Network, ANN) in simulated populations presenting different levels dominance effects. Simulated genome comprised 50k SNP 300 QTL, both biallelic randomly distributed across 29 autosomes. A total six traits were considering values for narrow broad-sense heritability. In purely...
Abstract This study aimed to estimate (co)variance components and genetic parameters for calving ease (CE) their correlations with growth, reproductive, carcass, feed efficiency traits in Nellore cattle. Phenotypes CE are scored two categories: normal assisted calving. The considered were probability of precocious calving, age at first stayability, adjusted scrotal circumference 365 days age, accumulated cow productivity, puberty males, gestation length, birth weight, weights 210 450 adult...
Genomic regions related to tropical adaptability are of paramount importance for animal breeding nowadays, especially in the context global climate change. Moreover, understanding genomic architecture these may be very relevant aiding programs choosing best selection scheme adaptation and/or implementing a crossbreeding scheme. The composite MONTANA TROPICAL® population was developed by crossing cattle four different biological types improve production harsh environments. Pedigree and...
Genome-wide association studies (GWAS) are utilized in cattle to identify regions or genetic variants associated with phenotypes of interest, and thus, design strategies that allow for the increase frequency favorable alleles. Visual scores important traits production Brazil because they as selection criteria, helping choose more harmonious animals. Despite its importance, there still no on genome these traits. This study aimed conformation, precocity muscling, based a visual score measured...