Abstract            Volume:6  Issue-4  Year-2018         Original Research Articles

Online ISSN : 2347 - 3215 Issues : 12 per year Publisher : Excellent Publishers Email : editorijcret@gmail.com

The purpose of the present study was to analyse the genetic variance (additive, dominance, epistatic) of milk yield and the resulting genetic effects in Bulgarian Dairy Synthetic Population (BDSP) sheep in the framework of an experiment for introduction of Chios and Lacaune sheep in the breeding and selection schedule of BDSP. A test-day model was used including daily milk yields as separate observation. The observed genetic variance was substantial, comprising 0.33 of the total variance. The proportion of the additive genetic variance was 0.23, while that of non-additive: 0.10 of the total variance. The observed genetic effects were statistically significant, and dominance genetic effect was positive (137.18). Additive genetic effect was also positive (27.86), and together with the dominance variance it constituted the major part of genetic variance. The epistatic genetic effect was negative (-33.15). The estimates of additive genetic effects and non-additive deviations for tested genetic groups showed diversity and deviations depending on the percentage of blood of the different breeds and pathways of genotypes’ formation.

Download this article as