Estimation of genetic parameters and evaluation of test-day milk production in sheep.

摘要: Genetic parameters and breeding values were estimated based on 11 708 daily milk yields from 2255 lactations (1351 sheep, 19 different flocks) between the years 2004 2010. The pedigree cov - ered 2334 individuals, including both recorded animals their known ancestors. fixed effects by least-squares method, while genetic REML method. data tested 49 models, but basis of coefficient-of-determination value significance effects, only 10 models used for analysis. most suitable model was chosen distribution heritability production, which at 0.28. flock parity number, test day, linear quadratic coefficients flock's days-in-milk in all highly significant (P < 0.0001) test-day yield. had a normal standard deviation 0.46 kg.