Relationship between the genetic hemoglobin polymorphism, morphometry and fertility of Pramenka sheep breed from Central Bosnia

Abstract

The characteristics of these sheep are highlighted depth measures of external appearance with modest width measures. Another weaker feature of Pramenka sheep is poor fertility. Despite the mentioned disadvantages, Pramenka sheep is the most grown sheep in Central Bosnia and sheep production is based on it. Methodical selection to improve the characteristics of Pramenka sheep has not applied. However, sheep breeders tend to improve the qualitative and quantitative characteristics of sheep, and that means more intensive work on the selection. In this sense, genetic markers are used to carry out the selection lately. Three types of hemoglobin, HbAA, Hband HbBB of Pramenka sheep population (at 189 male and female animals) in Central Bosnia were segregated by the method of electrophoresis. The following genotype frequencies are determined: HbAA 0.11; Hb0.41; and HbBB 0.48. Allele frequencies, HbA and HbB for Pramenka sheep breed (estimate based on genotype frequencies) were 0.315 and 0.685. It was found that the population of sheep was in the equilibrium of the frequency of hemoglobin genotypes. Sheep with HbAA genotype had lower morphometric measures in relation to the other two genotypes. The statistically significant difference between sheep with Hbgenotype and HbAA genotype was recorded only for the shin perimeter. The ewes that lambed one lamb have the following frequency of HbAA, Hband HbBB genotypes: 0.13; 0.40 and 0.47, and the ewes with twins: 0.02; 0.40 and 0.58. Fertility, as important quantitative characteristic of sheep, was more emphasized in genotype HbBB, than in HbAA genotype. This was confirmed by the statistical analysis.

Physico-Mechanical Properties of Dupska Pramenka Wool as Breed Characterization Descriptors

“…Momić (2014) reported the classification, linear measurements, texture and meat colour of Dupska Pramenka lambs, whereas Držaić et al (2017) report the effect of sex on slaughter traits and measurements of the Travnik (Dupska) Pramenka sheep lamb. In addition to the morphometric and production characterization of the Dupska Pramenka strain, genetic characterization was also performed through hemoglobin polymorphism (Važić et al, 2015;Važić et al, 2017c), as well as DNA characterization, establishing genetic distances between the Dupska Pramenka and other strains of Pramenka from the Balkan Peninsula. Furthermore, the genetic distance between the Dupska Pramenka strain and other well-known breeds of sheep in Europe was established (Ćinkulov et al, 2008; Ćurković et al, 2016).…”