Estimate of the Association of IGF-I and IGFALS Genes with Growth Traits in Hamdani Sheep

Abstract

IGF-I and IGFALS play a vital stimulator role in skeletal growth, cell differentiation, metabolism, and other physiological processes. A total of 65 (male and female) animals were used in the study. Animals were measured for growth traits at birth weight, weaning weight, and weights at 6 months. The average daily gain (ADG) was calculated from birth to weaning (ADG1) and from birth to 6th month (ADG2). PCR-RFLP analysis was used to detect IGF-I polymorphism at the 5' regulatory region and IGFALS at Exon 1. Three genotypes (AA, AB and BB) were observed for IGF-I/BfoI locus with allele and genotype frequency 0.79(A) and 0.21(B); 0.71(AA), 0.15(AB) and 0.14(BB). Also, three genotypes (AA, AB and BB) were found for IGFALS/HinfI site with allele and genotype frequency as 0.22(A) and 0.78(B); 0.11(AA), 0.23(AB) and 0.66(BB). The genes were in agreement with Hardy-Weinberg equilibrium (p>0.05). Association analysis suggested that IGF-I and IGFALS significantly affected the growth traits (P<0.05). In terms of birth weight, The AA genotypes of IGF-I were higher than AB and BB. The AB genotype in terms of IGF-I had higher ADG2 compared with other genotypes. The AA genotype of the IGFALS gene was higher in terms of birth weight than other genotypes. In addition, the BB genotype was higher ADG1 than AA and BB. It is suggested that polymorphism of the IGF-I and IGFALS genes may be a potential molecular marker for growth traits in Hamdani sheep.

Relationship of polymorphism of untranslated region (5-UTR) of the insulin-like growth factor (IGF-1) gene with milk production and growth traits in local black goats

“…The results of the study were in agreement with a number of studies in this field, as (Thomas et al, 2017) indicated in a study on two Indian goats that the insulinlike growth factor (IGF-1) gene is a member of the somatic axis and plays a major role in cell proliferation and differentiation in the growth of The fetus as well as postnatal growth, where it was significantly (P<0.05) superior to the individuals carrying the genotype GG (31.86 kg) in WWT compared to the individuals carrying the genotype AG (29.56 kg) in the Attappady Blak breed, and it did not show significant differences in WWT in Malabari breed. As well as what Bayraktar et al ( 2021) reported, where there were significant (p < 0.05) differences in WWT in the Iraqi Hamdania sheep breed, where the genotypes AA and BB gave a higher WWT (23.72 and 23.59 kg) respectively compared with the genotype AB (22.98) kg. While there were no significant differences in WG between the three genotypes (BB, AB, AA).…”

Assessment of the association of the MOGAT1 and MOGAT3 gene with growth traits in different growth stages in Holstein calves

“…A distinction must be made between true growth and fattening because true growth includes increasing the animal's size from structural tissues such as muscles and bones. In contrast, fattening increases size caused by increased fatty tissue (Bayraktar and Shoshin, 2022b;Jo et al, 2009). With the development of molecular techniques, it has become possible to identify genes that directly or indirectly affect the growth characteristics of animals (Bayraktar and Shoshin, 2022c;Park et al, 2018).…”