A5046523989- Genetic and phenotypic traits in livestock
- Genetic Mapping and Diversity in Plants and Animals
- Effects of Environmental Stressors on Livestock
- Animal Nutrition and Physiology
- Reproductive Physiology in Livestock
- Meat and Animal Product Quality
- Fatty Acid Research and Health
- Genetics and Plant Breeding
- Cancer-related molecular mechanisms research
- Digestive system and related health
- Animal Genetics and Reproduction
- Livestock and Poultry Management
- Liver Disease Diagnosis and Treatment
- Milk Quality and Mastitis in Dairy Cows
- Natural Products and Biological Research
Universidade de São Paulo
2014-2022
Methodist University of Piracicaba
2016-2021
Versar (United States)
2020
Universidade Federal de Viçosa
2020
Empresa de Pesquisa Agropecuária do Rio Grande do Norte
2020
Brazilian Agricultural Research Corporation
2020
University of Nebraska–Lincoln
2019-2020
Ambiente Italia (Italy)
2016
Genotyping in dairy cattle allows knowing the alleles and genotypes associated with milk proteins that affect yield quality. This study aimed to verify genotype profile for κ-casein I II (κ-CN), α-s1-casein (α-CN) β-lactoglobulin (β-LG), Holstein cows raised southern Brazil, where there is no scientific evidence on presence of these herds. Hair follicles samples from each animal were used DNA extraction genotyping. We calculated allelic genotypic frequencies four types protein variants...
Summary Information about genetic parameters is essential for selection decisions and evaluation. These estimates are population specific; however, there few studies with dairy cattle populations reared under tropical sub‐tropical conditions. Thus, the aim was to obtain of heritability correlations milk yield quality traits using pedigree genomic information from a Holstein maintained in environment. Phenotypic records (n = 36 457) 4203 cows as well genotypes 57 368 single nucleotide...
Poultry breeding programs have been focused on improvement of growth and carcass traits, however, this has resulted in correlated changes internal organ weights increased incidence metabolic disorders. These disorders can affect feed efficiency or even cause death. We used a high density SNP array (600 K, Affymetrix) to estimate genomic heritability, perform genome-wide association analysis, identify regions positional candidate genes (PCGs) associated with traits an F2 chicken population....
The present study aimed to estimate covariance components of milk fatty acids (FA) and compare the genomic estimated breeding values under general heat-stress effects. Data consisted 38,762 test-day records from 6,344 Holstein cows obtained May 2012 through January 2018 on 4 dairy herds Brazil. Single-trait repeatability models with random regressions as a function temperature-humidity index were used for genetic analyses. included contemporary groups, parity order (1-6), days in classes...
Abstract Measurements of milk yield (MY), somatic cell score (SCS), percentage fat (FP), protein (PP), lactose (LP), casein (CP) and palmitic (C16:0), stearic (C18:0), oleic (C18:1), total saturated (SFA), unsaturated (UFA), monounsaturated (MUFA) polyunsaturated (PUFA) fatty acids in from 5,224 Holstein cows were evaluated as a function temperature humidity index (THI). Legendre orthogonal polynomials second to seventh order tested. The best fit for MY, PP C18:0 was the third, whereas all...
Considering the milk fatty acid influence on human health, aim of this study was to compare gas chromatography (GC) and Fourier transform infrared (FTIR) spectroscopy for determination these compounds. Fatty content (g/100 g fat) were obtained by both methods compared through Pearson's correlation, linear Bayesian regression, Bland–Altman method. Despite high correlations between measurements (r = 0.60–0.92), regression coefficient values indicated higher measures palmitic acid, oleic...
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...
Resumo: O objetivo deste trabalho foi avaliar a eficiência do método ssGBLUP quanto à seleção e associação genômica ampla, com atribuição de pesos marcadores genéticos uso informações genótipos fenótipos, ou sem pedigree, diferentes coeficientes herdabilidade. A população estudada obtida por simulação dados 8.150 animais, 5.850 dos quais eram genotipados. Utilizou-se o para análise dados, duas matrizes relacionamento - pedigree -, os obtidos em cada iteração. aumento coeficiente...
Fatty acids (FA) have been related to effects on human health, sensory quality and shelf life of dairy products, cow's health methane emission. However, despite their importance, they are not regularly measured in all herds yet, which can affect the accuracy estimated breeding values (EBV) for these traits. In this case, an alternative is use genomic selection. Thus, aim was assess information genetic evaluation milk traits a tropical Holstein population. Monthly records (n = 36,457) FA...
Context Reproductive technologies may either contribute to the increase of genetic gains or inbreeding levels in dairy cattle breeding programs and herds. In general, studies have evaluated impacts on traditional traits, such as production reproduction. However, novel milk fatty acids profile, are scarce literature. Aim We aimed evaluate impact profile measured a Brazilian Holstein population. Methods Monthly records percentages (%) palmitic, stearic, oleic, total saturated, unsaturated,...
<title>Abstract</title> <bold>Background: </bold>Traditionally, breeding values are estimated based on phenotypic and pedigree information using the numerator relationship (<bold>A</bold>) matrix. With availability of genomic information, genome-wide markers can be included in estimation through kinship. However, density used impact cost implementation. The aim this study was to compare rank, accuracy, bias (EBV) for organs [heart (HRT), liver (LIV), gizzard (GIZ), lungs (LUN)] carcass...
Genomic tools can help in the selection of animals genetically resistant to heat stress, especially genome-wide association studies (GWAS). The objective this study was compare variance explained by SNPs and direct genomic breeding values (DGVs) at two levels a temperature humidity index (THI). Records milk yield (MY), somatic cell score (SCS), percentages casein (CAS), saturated fatty acids (SFA), unsaturated (UFA) from 1157 Holstein cows were used. Traditional (EBV) determined previous...
Evaluation of genetic and phenotypic trends is important to monitor the evolution dairy cattle breeding programs. Traits that are not commonly included as selection goals should also be monitored, especially when they have some effect on consumer health, such milk fatty acids profile. Thus, aim was evaluate composition a Holstein population, from three farms, reared in tropical environment. Monthly records palmitic (C16:0), stearic (C18:0), oleic (C18:1), total saturated (SFA), unsaturated...
Abstract The aim of this study was to compare the rank estimated breeding values (EBV) for organs (heart, liver, lungs and gizzard) carcass (breast, thigh drumstick) traits using pedigree-based BLUP (PBLUP) single-step genomic (ssGBLUP) models. A total 1,453 chickens (703 males 750 females) from a paternal broiler (TT) reference population belonging Poultry Breeding Program Embrapa Swine were genotyped with Axiom® Genome-Wide Chicken Genotyping Array (Affymetrix) 600K SNP panel. Samples call...