Genetic parameters and breeding values based on weaning results of hungarial simmental beef calves | Genetische Parameter und Zuchtwerte auf Basis der Absetzergebnisse von ungarischen Fleckvieh Fleischrind Kälbern
2010
Bene, S., Keszthely Univ. (Hungary). Pannon Universify Georgikon Fac. Dep. of Animal Science and Animal Production. | Rádli, S. | Kiss, B. | Polgár, J.P. | Szabo, F.
Weaning weight, preweaning daily gain and 205-day weight of Hungarian Fleckvieh calves (n = 8929, bulls = 4539, heifers = 4390) born from 232 sires between 1980 and 2003 were examined. Variance, covariance components and heritability values and correlation coefficients were estimated. The effect of the maternal permanent environment on genetic parameters and breeding values were examined. Two animal models were used for breeding value estimation. The direct heritability (h2d) of weaning weight, preweaning daily gain and 205-day weight was between 0.37 and 0.42. The maternal heritability (h2m) of these traits was 0.06 and 0.07. The direct-maternal correlations (rdm) were medium and negative -0.52 and -0.74. Contribution of the maternal heritability and maternal permanent environment to phenotype is smaller than that of direct heritability's (h2m + c2 h2d). The ratio of the variance of maternal permanent environment in the phenotypic variance (c2) changed from 3 to 6%. Estimated breeding values changed whether the permanent environmental effect of dam wasn't taken into consideration but the rank of the animals was not modified.
اظهر المزيد [+] اقل [-]الكلمات المفتاحية الخاصة بالمكنز الزراعي (أجروفوك)
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