Fixation of T allele in G>T Polymorphism in Exon 7 Region of Secreted Phosphoprotein 1 (SPP1) Gene in Indian Cattle Breeds

ABSTRACT

Secreted phosphoprotein 1 (SPP1) is popularly known as osteopontin (OPN), which plays an important role in initiation and maintenance of pregnancy, as well as in the development of the fetus and milk production. In the present study, investigation of G>T polymorphism in exon 7 region of SPP1 gene was undertaken in 147 Sahiwal and Hariana cattle maintained at Livestock Farm Complex (LFC), DUVASU, Mathura using HpyCH4IV/PCR-RFLP assay. Amplification of SPP1 exon 7 region revealed 204 bp product and HpyCH4IV restriction digestion screening showed monomorphic pattern. Only one type of genotype, namely, TT (204 bp) was observed in population. The frequency of TT genotypes was 100% in all screened samples with T allele (1.0). The results revealed that SPP1 T allele seems to be fixed in screened cattle population. Consequently, we could not perform the association study of this substitution with milk production traits