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Logo Leibniz Institute for Farm Animal Biology Logo Leibniz Association
Arch. Anim. Breed., 61, 197-206, 2018
https://doi.org/10.5194/aab-61-197-2018
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.
Original study
24 May 2018
Relationships between milk protein polymorphisms and production traits in cattle: a systematic review and meta-analysis
Memis Ozdemir1, Sinan Kopuzlu1, Mehmet Topal2, and Omer Cevdet Bilgin1 1Department of Animal Science, Faculty of Agriculture, Ataturk University, Erzurum, Turkey
2Department of Biostatistics, Kastamonu Faculty of Medicine, Kastamonu University, Kastamonu, Turkey
Abstract. Many researchers who have studied the relationships between milk protein polymorphisms and some yield traits in dairy cattle have reported incompatible results. In this study, in order to examine the overall relationships between milk protein genes known as major genes (CSN1S1, CSN2, CSN3, and BLG) and some yield traits (daily milk yield, lactation milk yield, fat yield, fat content, protein yield, and protein content), a meta-analysis was performed using some genetic models reported in the results of previous studies on cattle. The results suggest that the relationships of major milk protein genes with other factors should be studied using the codominant genetic model in general. Relationships among some CSN3 genotypes and fat yield, fat content, and protein content, and relationships between some BLG genotypes and daily milk yield, fat content, protein yield, and protein content were significant (P<0.05). No significant (P>0.05) relationships were found between these genotypes and other milk production traits. In addition, no significant (P>0.05) relationships between the CSN1S1 and CSN2 genotypes with the milk production traits examined were observed.
Citation: Ozdemir, M., Kopuzlu, S., Topal, M., and Bilgin, O. C.: Relationships between milk protein polymorphisms and production traits in cattle: a systematic review and meta-analysis, Arch. Anim. Breed., 61, 197-206, https://doi.org/10.5194/aab-61-197-2018, 2018.
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Short summary
The meta-analysis demonstrated that the relationships of major milk protein genes with other factors should be examined using the codominant genetic model in general. According to results of the meta-analysis, relationships among some CSN3 genotypes and fat yield, fat content, and protein content, and relationships among some BLG genotypes and daily milk yield, fat content, protein yield, and protein content were found statistically significant (p < 0.05).
The meta-analysis demonstrated that the relationships of major milk protein genes with other...
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