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

Online ISSN : 2347 - 3215
Issues : 12 per year
Publisher : Excellent Publishers
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Genetic Parameters of Milk Yield in Bulgarian Dairy Synthetic Population Sheep
Jivko Krastanov1*, Nevyana Stancheva2, Теоdora Angelova1, Georgi Kalaydzhiev1, Stayka Laleva1 and Daniela Yordanova1
1Agricultural Institute – Stara Zagora, Bulgaria
2Agricultural Institute – Shumen, Bulgaria
*Corresponding author

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.

Keywords: Additive and non-additive effects,Genetic parameters, Milk yield, Synthetic sheep populations, Test-day model
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How to cite this article:

Jivko Krastanov, Nevyana Stancheva, Теоdora Angelova, Georgi Kalaydzhiev, Stayka Laleva and Daniela Yordanova. 2018. Genetic Parameters of Milk Yield in Bulgarian Dairy Synthetic Population Sheep.Int.J.Curr.Res.Aca.Rev. 6(4): 1-10
doi: https://doi.org/10.20546/ijcrar.2018.604.001