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On progeny testing in cattle, with special reference to testing of 3 Red Polled bulls

, : On progeny testing in cattle, with special reference to testing of 3 Red Polled bulls. Litt om avkomsbed<o>mmelse i storfeavlen, samt avkomsundersokelse av 3 r<o>d-kollokser, Klofta: Romerike, 22: 105

THE first part is a review of the usual methods for progeny testing, measures of yield improvement, and the most common sources of variability. The special part deals with the results obtained by some of these methods on three Ostland bulls, a father and his 2 sons. Progeny testing was carried out by means of Hansson-Yapp's index and with the use of the daughter mean for milk-yield in kg., fat %, and butter-fat yield in kg.


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