Cilt:68 Sayı:04 (2021)
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Browsing Cilt:68 Sayı:04 (2021) by Author "Karacaören, Burak"
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Item Genomic prediction and association analyses of energy corrected milk yield in dairy cows(Ankara Üniversitesi, 2021-09-27) Karacaören, Burak; Veteriner FakültesiEnergy balance plays a critical role in the maintenance of metabolism for producing milk yield (MY) in dairy cows. In recent years, there has been increasing interest in genetic and genomic analyses of MY. In contrast to MY there is much less information about genomic evaluation of energy corrected milk yield (ECMY). The purpose of this paper is to detect associated single nucleotide polymorphisms (SNPs) with ECMY and genomic prediction (GP) of ECMY using different genomic models with special reference to underlying genetic architecture of ECMY. In this study we used published data of 773 Holstein cows with phenotypic observations for ECMY and dairy farm information with 62410 SNPs. One interesting finding is that some short chromosomes as such chromosomes 5 (included 28446 SNP) and 29 (included 12776 SNP) had higher effects sizes compared with the rest of the genome. A possible explanation for these results may be related with the existence of major genes at the chromosome 5. The GP results showed that ECYM and residuals of ECYM, had the accuracies from a 10-fold cross validations as 0.6422 and 0.3529 respectively. It was found that ECMY could be used for GP due to moderate accuracies. Taken together, dairy farm effects suggest an impact for accuracies of GP.