Effect of age of Dam and genotypes of IGF-1 gene and GH gene on wool production and some of its physical traits in local Awassi sheep

Abstract

    The study was conducted on a random sample consisting of 68 local Awassi ewes in the fields of Al-Kafeel Station in Karbala Governorate, and their productive performance was followed up (genotype) of the IGF-1 gene as well as the GH gene, which were 24, 30, 14 in the studied ewes sample for the AG, GC, and CC genotypes, respectively, for the IGF-1 gene, and 41, 27 for the CT, TC genotypes, respectively, for the GH gene. The purpose of this study was to determine the effect of the age of the dam and the genotypes of these genes on the traits of wool production and certain of its physical traits. The results showed the effect of the dam's age significantly on some of the productive and physical traits of wool. On the contrary, it was noted that the genotypes of the GH gene had a significant effect on some products and physical traits of wool, as the ewes of the genotype TC recorded the highest averages in of greasy and clean fleece weight, staple length and fiber length. As for the percentage of clean wool and fiber diameter, they were not significantly affected by the difference in genotypes.