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Heritability (h2) estimation of certain traits serving as measures of value in pure-bred Hungarian pig populations = Ocena heritabilitete (h2) določenih lastnosti kot merilo vrednotenja populacije čistokrvnih madžarskih prašičevCsató, L... ...The authors performed variance component estimation on Hungarian pig breeds by means of the VCE 3.2 programme developed by Groeneveld (1993). Determination of h2 value was performed for four ... pure-bred types and two basic hybrid lines by the application of individual models. Two covariant variables,5 fixed effects, one random (i.e., litter) and the characteristic effect were included in the models. The databases of the Hungarian operational individual performance examination (ÜSTV) and the central station examination (HVT) were used simultaneously by the programme in the estimation process. h2 values for two traits were estimated from the ÜSTV. Values between 0.14 and 0.33 were obtained for the trait relating to growth intensity, with a low degree of estimation error (between 2 and 8 %). In the case of mean back fat thickness, which serves as an expression of slaughter value, the h2 values estimated fell into the range 0.13 to 0.33, with a standard error of 2 to 13 %. The low h2 values obtained can be attributed to the so-termed confounding phenomenon, which occurs, through the mingling of the operational and the genetic effect, at genetically closed breeding sites. In the HVT h2 values for four traits were estimated. The heritability estimates obtained were the following: for the number of days of the fattening period, 0.24 - 0.46; for the quantity of diet consumed during the trial, 0.25 - 0.55; for the quantity of the valuable meat parts, 0.39 - 0.67; and for the meat quality points total, 0.04 - 0.21. Error in the heritability estimation varied between 3.0 and 24.8 % for the first three traits, and between 14.1 and 61.6 % for the fourth. Further estimations, founded on a larger database, are planned by the authors in an endeavour to provide an explanation for the differences in h2 value observed between breeds and genotypes.Source: Prilagajanje kakovosti animalne proizvodnje in proizvodov standardom Evropske unije = Quality adjustment of animal production and products to the European Union standards (Str. 97-103)Type of material - conference contributionPublish date - 1998Language - englishCOBISS.SI-ID - 724360
Author
Csató, L... |
Farkas, J... |
Obornik, A... |
Radnóczi, L... |
Groeneveld, Eildert
Topics
pig breeding |
selection |
genetic parameters |
heritability |
BLUP |
prašičereja |
selekcija |
genetski parametri |
heritabiliteta |
BLUP
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