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- Title
An initial investigation into the use of machine learning methods for prediction of carcass component yields in F2 broiler chickens.
- Authors
Bani Saadat, Hossein; Vaez Torshizi, Rasoul; Manafiazar, Ghader; Masoudi, Ali Akbar; Ehsani, Alireza; Shahinfar, Saleh
- Abstract
Context: As evaluation of carcass components is costly and time consuming, models for prediction of broiler carcass components are useful. Aims: The aim was to investigate the feasibility of machine learning methods in the prediction of carcass components from measurements on live birds during the rearing period. Methods: Three machine learning methods, including regression tree, random forest and gradient-boosting trees, were applied to predict carcass yields, and benchmarked against classical linear regression. Two scenarios were defined for prediction. In the first scenario, carcass yields were predicted by live bodyweight, shank length and shank diameter features, recorded at 2, 3 and 4 weeks of age. In the second scenario, predictor features recorded at 5, 6 and 7 weeks of age were used. The two scenarios were reanalysed by including effective single-nucleotide polymorphisms associated with bodyweight, shank length and shank diameter as new predictor features. Key results: The correlation coefficient between predicted and observed values for predicting weight of carcass traits ranged from 0.50 for wing to 0.59 for thigh in the first scenario, and from 0.63 for wing to 0.74 for carcass in the second scenario. These predictions for the percentage of carcass components ranged from 0.30 for wing to 0.39 for carcass and breast in the first scenario, and from 0.34 for thigh to 0.43 for carcass in the second scenario when random forest was used. Conclusions: Predictive accuracy in the first scenario was lower than in the second scenario for all prediction methods. Including single-nucleotide polymorphisms as predictor features in either scenario did not increase the accuracy of the prediction. Implications: In general, random forest had the best performance among machine learning methods, and classical linear regression in two scenarios, suggesting that it may be considered as an alternative to conventional linear models for prediction of carcass traits in broiler chickens. Evaluation of carcass component yields is costly and time consuming, thus models for the prediction of broiler carcass yields are useful. Three advanced predictive models were applied to predict carcass component yields, and benchmarked against the classical linear regression. Random forest had the best performance among machine learning methods, suggesting that it may be considered as an alternative to conventional linear models for prediction of carcass yields in broiler chickens. In all of the predictive model tested in this study, inclusion of single-nucleotide polymorphisms as predictor features lowered the predictive performance of the model.
- Subjects
BROILER chickens; MACHINE learning; REGRESSION trees; SINGLE nucleotide polymorphisms; RANDOM forest algorithms; PREDICTION models; IMAGE encryption; MEAT quality
- Publication
Animal Production Science, 2024, Vol 64, Issue 4, p1
- ISSN
1836-0939
- Publication type
Article
- DOI
10.1071/AN23129