A5015365278- Genetic and phenotypic traits in livestock
- Genetic Mapping and Diversity in Plants and Animals
- Animal Behavior and Welfare Studies
- Effects of Environmental Stressors on Livestock
- Animal Nutrition and Physiology
- Meat and Animal Product Quality
- Reproductive Physiology in Livestock
- Genetics and Plant Breeding
- Adipose Tissue and Metabolism
- Livestock Management and Performance Improvement
- Muscle metabolism and nutrition
- Cancer-related molecular mechanisms research
- Animal Genetics and Reproduction
- Sperm and Testicular Function
- Rural Development and Agriculture
- Human-Animal Interaction Studies
- Birth, Development, and Health
- Reproductive Biology and Fertility
- Moringa oleifera research and applications
- DNA Repair Mechanisms
- Research in Cotton Cultivation
- Molecular Biology Techniques and Applications
- Milk Quality and Mastitis in Dairy Cows
- Vector-Borne Animal Diseases
- Climate Change and Health Impacts
Universidade Federal de Viçosa
2016-2025
University of Georgia
2024
Canadian Science Centre for Human and Animal Health
2022
Empresa de Pesquisa Agropecuária de Minas Gerais
2017-2021
Wageningen University & Research
2014-2016
Seventy-two pigs of three genetic groups (Brazilian indigenous breed Piau, Commercial line and Crossbred) both sexes were slaughtered at four live weights (30, 60, 90 120 kg). Intramuscular fat (IMF) content in Longissimus dorsi muscle each animal was extracted correlated with candidate gene mRNA expression (ATN1, EEF1A2, FABP3, LDLR, MGP, OBSCN, PDHB, TRDN RYR1). Within slaughter weight kg, Piau Crossbred showed higher IMF (p < 0.05) than commercial animals, 2.48, 2.08 1.00% respectively....
Linkage disequilibrium (LD) across the genome is critical information for association studies and genomic selection because it determines number of SNP that should be used a successful analysis selection. also influences accuracy breeding values. Some have demonstrated in strong LD are organized into discrete blocks haplotypes, which separated by possibly hot spots recombination. To reduce markers needed to genotyped mapping, set can selected labels all haplotype blocks. We estimated LD,...
Genomic selection and genomic wide association studies are widely used methods that aim to exploit the linkage disequilibrium (LD) between markers quantitative trait loci (QTL). Securing a sufficiently large set of genotypes phenotypes can be limiting factor may overcome by combining data from multiple breeds or using crossbred information. However, estimated effect marker in one breed only useful for animals another if there is correspondence phase QTL across breeds. Using five pure pig...
Meta-analysis based on a random-effects model is used to summarise and overcome the variability between divergent parameter estimates. We proposed meta-analysis of published heritability genetic-correlation estimates for reproduction, growth carcass traits in purebred Nellore cattle. In total, 197 107 from 62 scientific publications were here. Most (gestation length; weights at birth, 120, 210, 365 550 days age; mature weight all traits) presented direct ranging 0.20 0.40. Age first calving...
This study aimed to compare two different Genome-Wide Selection (GWS) methods (Ridge Regression BLUP − RR-BLUP and Bayesian LASSO BL) predict the genomic estimated breeding values (GEBV) of four phenotypes, including boar taint compounds, i.e., concentrations androstenone (andro) skatole (ska), carcass traits, backfat thickness (fat) loin depth (loin), which were measured in a commercial male pig line. Six hundred twenty-two boars genotyped for 2,500 previously selected single nucleotide...
Abstract Background Heat stress (HS) poses significant threats to the sustainability of livestock production. Genetically improving heat tolerance could enhance animal welfare and minimize production losses during HS events. Measuring phenotypic indicators response understanding their genetic background are crucial steps optimize breeding schemes for improved climatic resilience. The identification genomic regions candidate genes influencing traits interest, including variants with...
This study aimed to investigate the impact of genotype-by-environment interaction (GEI) on body weight (BW) in meat quails. BW data from ten generations, recorded 7 (BW7), 14 (BW14), 21 (BW21), 28 (BW28), 35 (BW35), and 42 (BW42) days after hatching were used for analyses. A temperature humidity index (THI) divided into two classes (less or equal than 68 - THI1 greater -THI2) was as environmental descriptor. Variance components genetic parameters, including heritability correlation...
Nellore is the main cattle breed used in Brazil, being largest commercial herd world. Beyond importance of male reproductive efficiency for farm profit, use techniques, mainly artificial insemination, turns evaluation traits even more important. Estimation genetic parameters increases knowledge on variances and allows envisaging possibility inclusion new as selection criterion. Genetic fifteen that can be classified testicular biometry or physical morphological semen were estimated a bull...
Nucleotides are important to cell growth and division crucial the rapid proliferation of such cells as intestinal mucosa immune cells. Accordingly, nucleotide requirements animals high during periods stress like post-weaning period. Thus, supplementation may be a possible alternative in-feed antibiotics promoter in this phase. The study aimed evaluate dietary an on performance gut health weaned piglets. Ninety-six 21-day-old piglets, weighing 7.44 ± 0.65 kg, were allocated into 1 3...
As crossbreeding is extensively used in some livestock species, we aimed to evaluate the performance of single-step GBLUP (ssGBLUP) and weighted ssGBLUP (WssGBLUP) methods predict Genomic Estimated Breeding Values (GEBVs) crossbred animals. Different training population scenarios were evaluated: SC1) based on a single-trait model considering purebred animals joint population; SC2) multiple-trait enable phenotypes recorded as different traits; SC3) WssGBLUP jointly (both populations for SNP...
Context Greater production of oocytes and embryos from Gir donors contributes to greater fertility genetic progress. Aims This study aimed obtain parameters for oocyte embryo in the breed. Methods Repeatability random regression models were applied data consisting 17 526 Ovum Pick Up observations 1641 five different herds. Single multi-trait analyses carried out with application both traits: number viable oocytes, total embryos, using BLUPF90 family programs. Legendre polynomials second...
The local Brazilian pig breed Piau is a lard-type that has undergone breeding and selection process devised by the veterinarian Antonio Teixeira Vianna in 1939.The objective of program was to develop dual purpose animal, an animal suitable for production both fat meat.The main characteristics are rusticity, adaptability high disease resistance.The conservation status threatened, 1998, Pig Breeding Farm at Universidade Federal de Viçosa (UFV, Viçosa, MG, Brazil) started herd purposes use...
We aimed to evaluate multiple-trait Bayesian models for handling censored records in genetic evaluations of age at first calving (AFC) and stayability (STAY) Nellore cattle. Phenotypic pedigree datasets were provided by Brazilian Association Zebu Breeders. Four evaluated: linear-threshold model (LTM), penalty-threshold (PTM), modified (MPTM) linear-threshold-threshold (LTTM). Predictive ability the was compared using cross-validation analysis. The validation population composed youngest...
Genomic selection is applied to dairy cattle breeding improve the genetic progress of purebred (PB) animals, whereas in pigs and poultry target a crossbred (CB) animal for which different strategy appears be needed. The source information used estimate values, i.e., using phenotypes CB or PB may affect accuracy prediction. objective our study was assess direct genomic value (DGV) sources phenotypic information. Data were from 3 populations: 2,078 Dutch Landrace-based, 2,301 Large...
The aim of this study was to estimate genetic parameters for 305-day cumulative milk yield and components, growth, reproductive traits in Guzerá cattle.The evaluated were first-lactation yields (kg) (MY305), fat (FY305), protein (PY305), lactose (LY305), total solids (SY305); age at first calving (AFC) days; adjusted scrotal perimeter (cm) the ages 365 (SP365) 450 (SP450) body weight 210 (W210), (W365), (W450) days. (co)variance components estimated using restricted maximum likelihood method...