Relationship between the Polymorphisms of 5''Regulation Region of Prolactin Gene and Milk Traits in Chinese Holstein Dairy Cows

Li, J.T.; Wang, A.H.; Chen, P.; Li, H.B.; Zhang, C.S.; Du, L.X.

doi:2006.19.4.459

Article

Animal Breeding and Genetics

Asian-Australasian Journal of Animal Sciences 2006;19(4): 459-462.
https://doi.org/10.5713/ajas.2006.459 Published online February 1, 2006.

Relationship between the Polymorphisms of 5''Regulation Region of Prolactin Gene and Milk Traits in Chinese Holstein Dairy Cows

J.T. Li, A.H. Wang, P. Chen, H.B. Li, C.S. Zhang, L.X. Du^*

Correspondence: L.X. Du,

Abstract

Prolactin (PRL) plays an important role in promoting mammalian mammary gland development, and milk production during lactation. Therefore the PRL gene was chosen as a candidate gene for milk traits in Holstein dairy cows. PCR-SSCP and PCRRFLP were used to analyze genetic variations in the 5''regulation region of the PRL gene. In this part of the gene, two new polymorphic sites were detected in the Chinese Holstein dairy cows. One was a XbaI-RFLP locus, and the other was an SSCP locus. Statistical analysis showed that the XbaI-RFLP locus and the SSCP locus had a significant positive effect on milk traits.

Keywords: Prolactin (PRL); PCR-RFLP; PCR-SSCP; Milk Traits