Continuous progeny testing, use and selection of proven bulls in Israel

Authors

• R. Bar-Anan Institute of Animal Science, Volcani Research Centre, Bet Dagan, Israel

DOI: https://doi.org/10.23986/afsci.72144

Abstract

The breeding policy of the Israeli Holstein-type dairy cattle is reviewed. The bulls are progeny tested on their daughters’ first three lactations. The traits evaluated are the following: milk, fat, yield persistency, fertility, incidence of mastitis, and % cullings for three most important reasons. The test analysis takes into account the genetic level of daughters’ contemporaries and maternal grandsires. The paper describes a general outline of the selection decisions in AI bulls. Considerable amount of imported semen is used for breeding young bulls. Breeding goals are discussed against the estimated genetic parameters for and between the given traits.