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Kappa casein polymorphism and milk traits in Indian Murrah buffalo (Bubalus bubalis)

Aggarwal, R.A.K.; Sodhi, M.; Mukesh, M.; Ahlawat, S.P.S.; Yogendra Kumar; Chakravorty, A.K.; Raina, V.S.

Milchwissenschaft 62(2): 119-121

2007


ISSN/ISBN: 0026-3788
Accession: 013252856

Casein proteins are the major constituents of total protein in bovine milk and K.-casein holds significance due to its role in protein dispersion by micelle formation. Enhanced levels Of K-casein also influence milk processing traits. Association studies have been carried out in cattle, among genetic variants of casein and milk production traits. It has been observed that BB genotype Of K-casein resulted in high protein percentage in milk. Hence breeding programmes are designed to increase the frequencies of B allele Of K-casein in dairy animals through appropriate selection and breeding programmes. The present study was conducted to find out the genetic variants of CSN 3 locus in Indian Murrah buffaloes (sires and their daughters) and to explore their association with milk production traits, if any. As the PCR-RFLP analysis of all studied animals showed homozygosis at investigated locus, it was not possible to quantify the gene action on milk yield and other production traits. The monomorphism observed in buffalo may be exploited to develop a method to identify mixtures of cow and buffalo milk during cheese production.

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