Abstract
Bovine mastitis is a very complex and common disease of dairy cattle and a major source of economic losses to the dairy industry worldwide. In this study, the bovine TLR4 was taken as a candidate gene for mastitis resistance. This study aimed to analyze the associations of single nucleotide polymorphisms (SNP) or haplotype and somatic cell score (SCS) in 404 Chinese commercial dairy cattle including Chinese Holstein, Sanhe cattle and Chinese Simmental breeds. The polymerase chain reaction and sequencing methods were used for detecting genotype and allele frequency distribution of the two SNPs (rs8193062, rs8193064), statistical results showed that T allele at rs8193062 and C allele at rs8193064 were the predominate alleles. Moreover, six SNPs, including two SNPs (rs8193062, rs8193064) and four SNPs (rs8193060, rs8193069, rs29017188, rs8193046) which were chosen according the polymorphism level for the same cattle populations in previous studies, were used for haplotype analysis, the results revealed that twenty-one haplotypes were found in the mentioned animals, of which, Hap1 (30.5 %) and Hap2 (30.4 %) were the most common haplotypes. Hap2, Hap4 and Hap12 might negatively effect on milk SCS, whereas Hap13 might positively effect on milk SCS. The results in this study might assist in marker assisted selection and provided some reference to be implemented in breeding programs to improve the mastitis resistance of dairy cattle.
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We also thank the reviewers and editor for helpful comments. This work was supported by grants from the National Natural Science Foundation of China (31301943), the Natural Science Foundation of Hunan Province, China (11JJ4020), the Open Fund Project of Key Laboratory in Hunan Higher Education, China (11K045), the Ph D Introduction Program of Hunan University of Arts and Science (BSQD1002), the ‘‘Twelfth Five-Year Plan’’ National Science and Technology Support Project (2011BAD28B04), the Construct Program of the Key Discipline in Hunan province.
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Zhuo Ma Luoreng and Xing Ping Wang have contributed equally to this study.
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Wang, X.P., Luoreng, Z.M., Gao, S.X. et al. Haplotype analysis of TLR4 gene and its effects on milk somatic cell score in Chinese commercial cattle. Mol Biol Rep 41, 2345–2351 (2014). https://doi.org/10.1007/s11033-014-3088-7
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DOI: https://doi.org/10.1007/s11033-014-3088-7