Including gene networks to predict calving difficulty in Holstein, Brown Swiss and Jersey cattle

Francesco Tiezzi, Maria Arceo, John Cole & Christian Maltecca
Abstract Background Calving difficulty or dystocia has a great economic impact in the US dairy industry. Reported risk factors associated with calving difficulty are feto-pelvic disproportion, gestation length and conformation. Different dairy cattle breeds have different incidence of calving difficulty, with Holstein having the highest dystocia rates and Jersey the lowest. Genomic selection becomes important especially for complex traits with low heritability, where the accuracy of conventional selection is lower. However, for complex traits where...
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