Comparison of predicted and observed profits for two-, three- and four-way crosses in laying hybrids
1996
Pribylova, J. | Pribyl, J. | Soukupova, Z. | Milerski, M. (Vyzkumny Ustav Zivocisne Vyroby, Prague-Uhrineves (Czech Republic)) | Jakubec, V. | Tyller, M.
Full diallel crossing 9x9 and test of 9 three-way a 3 four-way crossbreds were performed for laying poultry. The total number of contemporary groups was 117 different combinations. Each resulting group consisted of 398.6 laying hens, on the average. Systematic environmental effects were eliminated with linear model equations. According to the genetic parameters from diallel crossing, prediction of performance was calculated for three- and four-way crossbreds in separate characters (egg number, average egg weight, egg mass, body weight, feed consumption and mortality). Feed consumption was estimated by multiple regression according to egg production, body weight and mortality. Separate characters were combinated for profit function. Rank of lines and given combinations is according to the value of profit. The profit ranged from -24.5 to 58.8 Kc per average hen in a given genotype. The correlations between the observed and predicted value of profit for three and four-way crosses were significant.
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