Luiz F. Brito
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View article: Genotyping strategies for single-step genomic predictions in a simulated sheep population under different scenarios of pedigree error types
Genotyping strategies for single-step genomic predictions in a simulated sheep population under different scenarios of pedigree error types Open
Genomic predictions provide more accurate estimated breeding values (EBV) in younger animals. However, sheep reference populations are still small and if the animals included in the reference populations are not chosen carefully, genomic p…
View article: Genetic parameters for calf social dominance indicators derived from automated milk feeding records in American Holstein calves
Genetic parameters for calf social dominance indicators derived from automated milk feeding records in American Holstein calves Open
Automated milk feeders (AMF) generate large-scale longitudinal milk feeding data in calves, providing a great opportunity for deriving the novel traits that may be included in cattle breeding programs. For group-housed dairy calves, geneti…
View article: Genetics of reproductive performance across Porcine Reproductive and Respiratory Syndrome (PRRS) outbreak phases in purebred and crossbred sows
Genetics of reproductive performance across Porcine Reproductive and Respiratory Syndrome (PRRS) outbreak phases in purebred and crossbred sows Open
View article: Genome-wide association and functional genomic analyses for udder conformation traits derived from data recorded by robotic milking systems in American Holstein cattle
Genome-wide association and functional genomic analyses for udder conformation traits derived from data recorded by robotic milking systems in American Holstein cattle Open
The implementation of automatic milking systems (AMS) in modern dairy farming has significantly facilitated genetic evaluation of udder conformation traits in dairy cattle. As AMS-based udder conformation traits are highly heritable in Hol…
View article: Genetic diversity of US Rambouillet in the National Sheep Improvement Program compared to other sheep breeds
Genetic diversity of US Rambouillet in the National Sheep Improvement Program compared to other sheep breeds Open
Breed management and genomic evaluation rely on understanding population structure and genetic diversity. The primary objective of this study was to evaluate genetic diversity in Rambouillet enrolled in the National Sheep Improvement Progr…
View article: PSXIII-3 Effects of supplementing threonine above the nutritional requirements in diets with soybean hulls on growth performance and digesta transit of growing pigs.
PSXIII-3 Effects of supplementing threonine above the nutritional requirements in diets with soybean hulls on growth performance and digesta transit of growing pigs. Open
Soybean hulls (SBH) are a low-cost, abundantly available fiber-rich coproduct used in pig diets to reduce feed costs and environmental footprints, thus contributing to more sustainable swine production. However, fiber-rich diets can increa…
View article: Genomics and phenomics: Who will be the dairy cows of the future?
Genomics and phenomics: Who will be the dairy cows of the future? Open
View article: 398 Characterizing the genomic background of climatic resilience in pigs through quantitative epigenetic models, novel traits, and biological validation studies.
398 Characterizing the genomic background of climatic resilience in pigs through quantitative epigenetic models, novel traits, and biological validation studies. Open
Heat stress negatively impacts the welfare and productive efficiency of pigs at different life stages. However, lactating sows are at a greater risk of deleterious heat-stress effects due to a substantial increase in litter and piglet size…
View article: Transcription factors and candidate functional <scp>SNPs</scp> associated with variation in fatty acid composition from skeletal muscle of pigs
Transcription factors and candidate functional <span>SNPs</span> associated with variation in fatty acid composition from skeletal muscle of pigs Open
Pork is an essential source of fatty acids (FAs) in the human diet. Fatty acids are important for various biological processes and can impact transcription regulation. The primary objective of this study was to identify candidate functiona…
View article: 324 Genetic parameters for sow longevity traits in purebred and crossbred maternal line pig populations.
324 Genetic parameters for sow longevity traits in purebred and crossbred maternal line pig populations. Open
Breeding for improved sow longevity will contribute to directly improving animal welfare, production efficiency, and environmental sustainability in the swine industry. Sow longevity is a complex trait that can be defined by different indi…
View article: 320 Can We define production environments more effectively by combining climate and management data?
320 Can We define production environments more effectively by combining climate and management data? Open
The U.S. sheep industry operates under diverse environments, with differences in climatic and management conditions. A consequence may be expression of genotype-by-environment interactions (G×E), necessitating their incorporation into bree…
View article: 235 The impact of genotyping strategies and pedigree errors on single-step genomic prediction in sheep populations: a simulation study.
235 The impact of genotyping strategies and pedigree errors on single-step genomic prediction in sheep populations: a simulation study. Open
Genomic predictions provide more accurate estimated breeding values (EBV) in younger animals, enabling greater rates of genetic gain, but are still limited in sheep mostly because of high genotyping costs relative to individual animal valu…
View article: 245 Genetic parameters for reproductive performance traits before, during, and after Porcine Reproductive and Respiratory Syndrome outbreaks in a purebred maternal line.
245 Genetic parameters for reproductive performance traits before, during, and after Porcine Reproductive and Respiratory Syndrome outbreaks in a purebred maternal line. Open
Porcine reproductive and respiratory syndrome (PRRS) is a viral disease with a significant impact on the swine industry worldwide. Therefore, breeding for improved PRRS resistance and resilience is of great interest in swine breeding progr…
View article: Genotype imputation accuracy of X chromosome variants in Holstein cattle based on different software and imputation strategies
Genotype imputation accuracy of X chromosome variants in Holstein cattle based on different software and imputation strategies Open
The X chromosome is one of the largest in the cattle genome, but little is known about the imputation of X chromosome variants. Thus, the main objective of this study was to assess the imputation accuracy of SNPs located in the X chromosom…
View article: Invited review: Using data from sensors and other precision farming technologies to enhance the sustainability of dairy cattle breeding programs
Invited review: Using data from sensors and other precision farming technologies to enhance the sustainability of dairy cattle breeding programs Open
The increased uptake of sensor technologies and precision farming tools for the dairy cattle sector is enabling real-time monitoring of animal health, welfare, and productivity. These digital advancements provide high-frequency, objective,…
View article: Estimation of Genetic Parameters and Weighted Single-Step Genome-Wide Association Study for Indicators of Colostrum Quality in Chinese Holstein Cattle
Estimation of Genetic Parameters and Weighted Single-Step Genome-Wide Association Study for Indicators of Colostrum Quality in Chinese Holstein Cattle Open
Colostrum is the milk harvested during the first few hours after calving, which contains high levels of immunoglobulins, antimicrobial peptides, and growth factors essential for the health of neonates. The primary objective of this study w…
View article: Genome‐Wide Detection of Copy Number Variation and Association Studies With Physiological and Anatomical Indicators of Heat Stress Response in Lactating Sows
Genome‐Wide Detection of Copy Number Variation and Association Studies With Physiological and Anatomical Indicators of Heat Stress Response in Lactating Sows Open
Indicators of heat stress response are heritable complex traits with polygenic inheritance. Copy number variations (CNV) are important genomic structural variations that may be linked to climatic adaptation by influencing the phenotypic va…
View article: Effects of microclimate during transport on physiological indicators of market pig welfare: a systematic review with meta-analysis
Effects of microclimate during transport on physiological indicators of market pig welfare: a systematic review with meta-analysis Open
During transportation, microclimatic conditions can fluctuate significantly, affecting pigs’ thermal comfort and leading to compromised welfare and production losses. Although numerous studies have examined the effects of heat stress durin…
View article: Exploring the impact of heat stress on feed efficiency in tropical beef cattle using genomic reaction norm models
Exploring the impact of heat stress on feed efficiency in tropical beef cattle using genomic reaction norm models Open
Global climate change poses significant challenges to livestock production, particularly in tropical regions where cattle frequently experience heat stress (HS). HS negatively impacts feed efficiency by reducing feed intake, altering metab…
View article: Genome-wide association and functional annotation analyses reveal candidate genes and pathways associated with various ewe longevity indicators in U.S. Katahdin sheep
Genome-wide association and functional annotation analyses reveal candidate genes and pathways associated with various ewe longevity indicators in U.S. Katahdin sheep Open
Ewe longevity indicators are complex traits that are lowly heritable, expressed late in life, and sex-limited, making them challenging to include in breeding programs. In this context, genome-wide association studies (GWASs) can provide mo…
View article: Unraveling genomic regions with transmission ratio distortion harboring putative lethal alleles and their biological implications in Nellore cattle from experimental selection lines
Unraveling genomic regions with transmission ratio distortion harboring putative lethal alleles and their biological implications in Nellore cattle from experimental selection lines Open
Transmission Ratio Distortion (TRD) refers to deviations from expected Mendelian inheritance patterns when alleles from heterozygous parents are transmitted at frequencies different from the expected 50%, influenced by biological mechanism…
View article: Genome-wide association study for feed efficiency indicator traits in Nellore cattle considering genotype-by-environment interactions
Genome-wide association study for feed efficiency indicator traits in Nellore cattle considering genotype-by-environment interactions Open
Introduction Feed efficiency is a key factor in animal production sustainability, directly affecting production costs, environmental efficiency, and farmer profitability. The inclusion of feeding efficiency traits in cattle breeding progra…
View article: Genotype-by-environment interaction across THI classes impacts the selection for body weight at young ages in meat quails
Genotype-by-environment interaction across THI classes impacts the selection for body weight at young ages in meat quails Open
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 on 7 (BW7), 14 (BW14), 21 (BW21), 28 (BW28), 35 (BW35), and 42 (BW42) days a…
View article: Genomic-based genetic parameters for daily milk yield and various lactation persistency traits in American Holstein cattle
Genomic-based genetic parameters for daily milk yield and various lactation persistency traits in American Holstein cattle Open
Genomic-based genetic parameters for daily milk yield and lactation persistency were estimated for the first 3 lactations in American Holstein cattle. Data included 5,235,411 daily milk yield records on automatic milking systems and milkin…
View article: 89 Mitigating the effects of gestational heat stress on reproductive efficiency in replacement gilts divergently selected for thermotolerance in the F1 generation
89 Mitigating the effects of gestational heat stress on reproductive efficiency in replacement gilts divergently selected for thermotolerance in the F1 generation Open
Gestational heat stress (HS) reduces reproductive efficiency and welfare in sows and their litters. Therefore, this study evaluated whether genomic selection for HS tolerance (TOL) in the F1 generation improved reproductive outcomes and li…
View article: 91 Thermoregulatory and physiological responses of in utero heat-stressed pigs genomically selected for heat stress tolerance in the F2 generation
91 Thermoregulatory and physiological responses of in utero heat-stressed pigs genomically selected for heat stress tolerance in the F2 generation Open
In utero heat stress (IUHS) adversely impacts the ability of pigs to thermoregulate during heat stress (HS) when compared to in utero thermoneutral (IUTN) pigs. While nutritional and management interventions have been explored, genomic sel…
View article: 214 In utero heat stress alters testis development and circulating cytokines profiles in pre-pubertal boars
214 In utero heat stress alters testis development and circulating cytokines profiles in pre-pubertal boars Open
In utero heat stress (IUHS) reduces boar semen quality and represents an emerging threat to swine reproductive efficiency. However, the cellular/molecular mechanisms driving this effect are poorly characterized. Additionally, genomic selec…
View article: PSI-1 Effects of in utero heat stress on the circulating cytokine response of F2 generation pigs genomically selected for heat stress sensitivity or tolerance and given a lipopolysaccharide challenge
PSI-1 Effects of in utero heat stress on the circulating cytokine response of F2 generation pigs genomically selected for heat stress sensitivity or tolerance and given a lipopolysaccharide challenge Open
Previous research demonstrates that in utero heat stress (IUHS) increases the circulating cytokine response of pigs subjected to a lipopolysaccharide challenge during postnatal life relative to in utero thermoneutral (IUTN) exposed pigs. T…
View article: Investigating the genetic background of novel behavioral indicators of robotic milking efficiency in North American Holstein cattle
Investigating the genetic background of novel behavioral indicators of robotic milking efficiency in North American Holstein cattle Open
The adoption of automated milking systems (AMS) across worldwide dairy farms has grown considerably over the last few decades. Automated milking systems contribute to reducing labor costs, increasing milk performance, improving cow welfare…
View article: Data processing techniques to improve data integration from dairy farms
Data processing techniques to improve data integration from dairy farms Open
Large-scale data generation on dairy cattle farms is expected to continue increasing due to more animals per farm and the adoption of on-farm sensors and technologies that generate additional information on individual animals in greater fr…