A Master’s thesis in the College of Agriculture entitled: *“The Relationship Between the Genetic Polymorphisms of the Beta-3 Adrenergic Receptor (ADRB3) Gene and the Productive Performance of Local Goats.”*
The College of Agriculture at the University of Diyala convened the defense of the Master’s thesis entitled “The Relationship Between the Genetic Polymorphisms of the Beta-3 Adrenergic Receptor (ADRB3) Gene and the Productive Performance of Local Goats.”
The study, submitted by Ms. Sahar Rasheed Halil, examined the effect of the genetic patterns of the beta-3 adrenergic receptor (ADRB3) gene, hair color, and maternal birth weight on milk production and its components, as well as on body measurements in Iraqi local goats.
The study reached several conclusions, most notably:
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Molecular analysis of the ADRB3 gene revealed no point mutations or single nucleotide polymorphisms (SNPs) in the examined samples (40 samples), indicating clear genetic homogeneity within this gene segment.
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No significant effect of hair color was observed on weekly milk production or its chemical composition during the first and second months of lactation. Likewise, no effect was detected on colostrum components, suggesting that hair color does not constitute a genetic indicator associated with productive efficiency.
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Maternal birth weight did not exert a significant effect on weekly milk yield, its chemical composition, or colostrum components, indicating that this trait is not a determining factor in the productive performance of Iraqi local goats.
The study recommends conducting broader molecular investigations employing advanced and precise techniques to detect subtle genetic variations in the ADRB3 gene and other production-related genes. It further emphasizes prioritizing environmental, nutritional, and managerial factors, as these appear to exert a greater influence on productive performance than phenotypic traits. The findings are recommended for application in breeding and selection programs, with particular focus on quantitative production traits such as milk yield and growth. Additionally, complementary studies are advised to explore the relationship between genes responsible for hormonal response and productive traits.
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