Vivian Breen
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View article: Facial Chick Sexing: An Automated Chick Sexing System From Chick Facial Image
Facial Chick Sexing: An Automated Chick Sexing System From Chick Facial Image Open
Chick sexing, the process of determining the gender of day-old chicks, is a critical task in the poultry industry due to the distinct roles that each gender plays in production. While effective traditional methods achieve high accuracy, co…
View article: Reviewing the definition of mortality in broiler chickens and its implications in genomic evaluations
Reviewing the definition of mortality in broiler chickens and its implications in genomic evaluations Open
Mortality is an economically important trait usually handled as a discrete outcome from hatch time until selection in most broiler breeder programs. However, in other species, it has been shown that not only does the genetic component chan…
View article: Combining large broiler populations into a single genomic evaluation: dealing with genetic divergence
Combining large broiler populations into a single genomic evaluation: dealing with genetic divergence Open
Combining breeding populations that have diverged at some point is a conventional practice, particularly in the poultry industry, where generation intervals are short and genetic evaluations should be frequently available. This study aimed…
View article: 128 Reviewing the Definition of Mortality in Broiler Chickens
128 Reviewing the Definition of Mortality in Broiler Chickens Open
Mortality has been a trait of importance in livestock species, especially for poultry, as birds continue to become more efficient and grow larger, and mortality rates have shown an increase at the phenotypic level. Mortality at different s…
View article: 153 Genomic Prediction and Genetic Parameters of Residual Feed Intake Computed Using Linear and Non-Linear Regression Methods in Broiler Chickens
153 Genomic Prediction and Genetic Parameters of Residual Feed Intake Computed Using Linear and Non-Linear Regression Methods in Broiler Chickens Open
Feed efficiency traits are important for reducing feeding costs while potentially decreasing the environmental impact of broiler production. This study aimed to compare the predictive ability of different genome-wide prediction models for …
View article: 152 Leveraging Rfid Technology to Investigate the Genetic Associations Between Feeding Behavior and Leg Health in Floor-Raised Broilers
152 Leveraging Rfid Technology to Investigate the Genetic Associations Between Feeding Behavior and Leg Health in Floor-Raised Broilers Open
Leg disorders (LD) pose serious welfare issues in broiler chickens. The objective of this study was to investigate the suitability of using feeding behavior (FB) traits as potential leg health indicators in floor-raised broilers. The data …
View article: 116 Using Theoretical and Realized Accuracies to Estimate Changes in Heritabilities
116 Using Theoretical and Realized Accuracies to Estimate Changes in Heritabilities Open
Under genomic selection, heritabilities for strongly selected traits are reduced, and antagonism between production and fitness traits can intensify. However, estimating genetic parameters by established methods such as REML or Bayesian wi…
View article: (Quasi) multitask support vector regression with heuristic hyperparameter optimization for whole-genome prediction of complex traits: a case study with carcass traits in broilers
(Quasi) multitask support vector regression with heuristic hyperparameter optimization for whole-genome prediction of complex traits: a case study with carcass traits in broilers Open
This study investigates nonlinear kernels for multitrait (MT) genomic prediction using support vector regression (SVR) models. We assessed the predictive ability delivered by single-trait (ST) and MT models for 2 carcass traits (CT1 and CT…
View article: Efficient ways to combine data from broiler and layer chickens to account for sequential genomic selection
Efficient ways to combine data from broiler and layer chickens to account for sequential genomic selection Open
In broiler breeding, superior individuals for growth become parents and are later evaluated for reproduction in an independent evaluation; however, ignoring broiler data can produce inaccurate and biased predictions. This research aimed to…
View article: Derivation of indirect predictions using genomic recursions across generations in a broiler population
Derivation of indirect predictions using genomic recursions across generations in a broiler population Open
Genomic estimated breeding values (GEBV) of animals without phenotypes can be indirectly predicted using recursions on GEBV of a subset. To maximize predictive ability of indirect predictions (IP), the subset must represent the independent…
View article: phenotypes and kernels
phenotypes and kernels Open
The G3_R1.RData file contains the necessary data to replicate the main results found in the paper titled: (Quasi) Multi-task support vector regression with heuristic hyperparameter optimization for whole-genome prediction of complex traits…
View article: 435. Optimizing sampling strategies for sib test schemes in a broiler breeder program
435. Optimizing sampling strategies for sib test schemes in a broiler breeder program Open
In broiler breeding there is a known genotype by environment interaction for bodyweight measured in a bio-secure (BWB) or in a commercial environment (BWC), thus a sib test scheme to record and use BWC records is beneficial. This study est…
View article: 8 Prediction of Culling and Mortality Risks in Group-Housed Broilers Using Machine Learning Methods Trained with Time-Series Data of Feeding Behavior Traits
8 Prediction of Culling and Mortality Risks in Group-Housed Broilers Using Machine Learning Methods Trained with Time-Series Data of Feeding Behavior Traits Open
In this study, we investigated the performance of different machine learning (ML) methods for predicting withdrawing events (culled or dead animals) according to feeding behaviors (FB) time series. The raw data comprised a total of 1,492,4…
View article: 39 Genetic Associations between Feeding Behavior and Economic Interest Traits in Group-Housed Broilers
39 Genetic Associations between Feeding Behavior and Economic Interest Traits in Group-Housed Broilers Open
This study aimed to assess the genetic relationship among feeding behavior (FB), feed efficiency (FE), and production traits in broilers. A total of 44,234,350 feeders visit logs from 55,400 birds allocated into 88 trials were recorded by …
View article: phenotypes and kernels
phenotypes and kernels Open
This rda file provides the necessary data to replicate the main results found in the paper titled: (Quasi) Multi-task support vector regression with heuristic hyperparameter optimization for whole-genome prediction of complex traits: a cas…
View article: Investigating the persistence of accuracy of genomic predictions over time in broilers
Investigating the persistence of accuracy of genomic predictions over time in broilers Open
Accuracy of genomic predictions is an important component of the selection response. The objectives of this research were: 1) to investigate trends for prediction accuracies over time in a broiler population of accumulated phenotypes, geno…
View article: Modeling genetic differences of combined broiler chicken populations in single-step GBLUP
Modeling genetic differences of combined broiler chicken populations in single-step GBLUP Open
The introduction of animals from a different environment or population is a common practice in commercial livestock populations. In this study, we modeled the inclusion of a group of external birds into a local broiler chicken population f…
View article: Would large reference populations unveil the potential of deep neural networks for improved genome-enabled prediction of complex traits? The case for body weight in broilers.
Would large reference populations unveil the potential of deep neural networks for improved genome-enabled prediction of complex traits? The case for body weight in broilers. Open
Background: Deep neural networks (DNN) are a particular case of artificial neural networks (ANN) composed by multiple hidden layers, and have recently gained attention in genome-enabled prediction of complex traits. Yet, few studies in gen…
View article: Correction to: Validation of genomic predictions for body weight in broilers using crossbred information and considering breed-of-origin of alleles
Correction to: Validation of genomic predictions for body weight in broilers using crossbred information and considering breed-of-origin of alleles Open
Following publication of original article [1], we noticed that there was an error: Eq. (3) on page 5 is the genomic relationship matrix that
View article: MOESM2 of Estimating the purebred-crossbred genetic correlation of body weight in broiler chickens with pedigree or genomic relationships
MOESM2 of Estimating the purebred-crossbred genetic correlation of body weight in broiler chickens with pedigree or genomic relationships Open
Additional file 2. Estimates of variance components for CB performance of BW35 from models that either fit a single G matrix (GEN_CB), or that separately fit a genetic sire component and a genetic dam component with two BOA matrices.
View article: MOESM1 of Estimating the purebred-crossbred genetic correlation of body weight in broiler chickens with pedigree or genomic relationships
MOESM1 of Estimating the purebred-crossbred genetic correlation of body weight in broiler chickens with pedigree or genomic relationships Open
Additional file 1. Estimates of variance components and purebred-crossbred genetic correlations of body weight around 7 (BW7) and 35Â days (BW35) for four models. Description: Estimates of variance components are presented for each purebre…