Evaluation of bull fertility in Italian Brown Swiss dairy cattle using cow field data
نویسندگان
چکیده
Dairy bull fertility is traditionally evaluated using semen production and quality traits; however, these attributes explain only part of the differences observed in among bulls. Alternatively, can be directly cow field data. The main objective this study was to investigate Italian Brown Swiss dairy cattle population confirmed pregnancy records. data set included a total 397,926 breeding records from 1,228 bulls 129,858 lactating cows between first fifth lactation 2000 2019. We success, including factors related under evaluation, such as age, inbreeding, AI organization, associated with that receives dose semen, herd-year-season, parity, milk yield. then estimated sire conception rate bull. Model predictive ability 10-fold cross-validation 10 replicates. Interestingly, our analyses revealed there substantial variation bulls, more than 20% difference high-fertility low-fertility also showed prediction feasible achieved correlations equal 0.30 for rate. Improving reproduction performance one major challenges industry worldwide, this, it essential have accurate predictions service fertility. This represents foundation development novel tools will allow producers, breeders, artificial insemination companies make enhanced management selection decisions on male
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ژورنال
عنوان ژورنال: Journal of Dairy Science
سال: 2021
ISSN: ['0022-0302', '1525-3198', '1529-9066']
DOI: https://doi.org/10.3168/jds.2021-20332