Effect of DGAT1 K232A mutation and breed on milk traits in Cattle Populations of Ethiopia

• Authors: Samuel Behailu , Dadi Hailu , Dinka Hunduma
• Languages of publication: EN

Abstracts

EN

Substitution mutation (K232A) has been reported to explain variation in milk traits in diacylglycerol acyl-CoA acyltransferase 1 (DGAT1) gene. The objective of this study was to investigate and analyze allele and genotype frequency and associations between K232A and milk traits in cattle populations of Ethiopia. Boran-Holstein produced higher daily milk yield than the others (P < 0.05) and Boran and Begait breeds produced milk with higher fat and protein content (P < 0.05). Horro presented higher content of milk lactose than the studied breeds (P < 0.05) and Boran, Begait and Horro breeds produced milk with higher content of SNF. Allele K and A and genotypes AA, KA and KK were detected, the highest allele and genotype frequencies were K and KK, respectively. DGAT1 protein variant K232 was high in Horro, Boran and Fogera cattle ranged (0.50–0.97). The KK and KA genotypic frequencies observed ranged from 0.50-0.94 and 0.03-0.50 for native cattle breeds, respectively. KK and KA genotype had statistically significant association with fat and lactose content, respectively, whereas genotype AA has the greatest association with average daily milk yield. The KK cows produced more milk fat (6.35±0.05) and KA more lactose (5.6±0.21), respectively, and AA cows produced more average daily milk yield (10±0.21 L/day). The association study confirms that DGAT1 K232A marker had significant effects on daily milk yield, milk fat and lactose content in the investigated cattle. These results suggested that DGAT1 marker may be evaluated to achieve various commercial goals in Ethiopian cattle production.

Keywords

EN

Association analysis; Ethiopian cattle; K232A; Milk composition; genotypic frequency

Discipline

• GENETICS: GENETICS

• Publisher: Scientific Publishing House „DARWIN”
• Journal: World News of Natural Sciences
• Year: 2022
• Volume: 45
• Pages: 143-157

Contributors

author

Samuel Behailu

• Adama Science and Technology University, P. O. Box 1888, Adama, Ethiopia

author

Dadi Hailu

• Bio and Emerging Technology Institute, P. O. Box 5954, Addis Ababa, Ethiopia

author

Dinka Hunduma

• Adama Science and Technology University, P. O. Box 1888, Adama, Ethiopia

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• Document Type: article