Ciornei, Ștefan-GregoreLavro, Valentin-AlexandruMaciuc, Clara-IonelaPruteanu, Ioana-LiviaȘchiopu, Sebastian-GabrielNacu, GherasimNechifor, FlorinRoșca, Petru2026-06-102026-06-1020251454-7406https://repository.iuls.ro/handle/20.500.12811/6596The Total Performance Index (TPI) is a key genetic evaluation tool developed to rank Holstein bulls based on their ability to enhance herd productivity, health, and longevity. Widely used in the United States and beyond, TPI integrates traits like milk production, fertility, and conformation into a single score, guiding dairy farmers in selecting bulls that can genetically improve their herds. This project aims to delve deeply into the TPI classification system, exploring its methodology, significance, and impact on global dairy farming. Additionally, it will compare TPI with other herd quality indicators, such as the Profitable Lifetime Index (PLI) in the UK and the Lifetime Profit Index (LPI) in Canada, to highlight the diversity in genetic evaluation systems across different countries. The future of dairy farm sustainability lies in genomic testing and knowledge of the performance indices of bulls and cows, combining them in new generations of animals through reproductive biotechnologies such as embryo transfer.EnglishAttribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)http://creativecommons.org/licenses/by-nc-sa/4.0/Genetic evaluationHeard qualityProductivityArticle2393-4603https://doi.org/10.61900/SPJVS.2025.04.09