Bayesian estimates of genetic variance of fertility and hatchability under a threshold animal model
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August Cieszkowski Agricultural University of Poznań, Department of Mathematical and Statistical Methods, Wojska Polskiego 28, 60-637 Poznań, Poland
August Cieszkowski Agricultural University of Poznań, Department of Genetics and Animal Breeding, Wołyńska 33, 60-637 Poznań, Poland
Publication date: 2003-04-04
J. Anim. Feed Sci. 2003;12(2):307-314
The genetic variability of fertility and hatchability of laying hens were studied in four strains under long-term selection for productive traits. Data were collected over nine generations. The total number of individuals recorded per strain ranged from 2015 to 5386. The traits were analysed as binary characters under the threshold animal model using Gibbs sampling. The point estimates of heritability of fertility were relatively high and ranged from 0.38 to 0.46. The estimates for hatchability were lower and ranged from 0.22 to 0.24. All the strains showed positive genetic trends.
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