Optimization of sire selection based on maximization of guaranteed income and risk associated with sire merit

摘要

A method based on discounted income and risk assessment was developed to aid in the selection of dairy sires. The discounted profit generated form milk production of daughters was proposed as the suitable composite selection criterion to combine estimates of predicted transmitting ability(PTA)for yields of milk, fat, and protein and estimates of sire evalaua- tions for dystocia or expected progeny difference. Steps are described to derive discounted profit(de- Fined as expected income)for a sire with known PTA And evaluation for dystocia. The derivation of profit Considered costs for semen, dystocia, heifer raising, Production and maintenance of the daughter, and Income from milk.