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Polymorphism of Bovine Forebrain Embryonic Zinc Finger Like (FEZL) Gene Associated with Resistance to Mastitis in Indian Cattle

Rajesh Kumar Somasundaram, Iswar Dayal Gupta, K. N. Raja, Kathiravan Periasamy, Saravanan Ramasamy.


Bovine forebrain zinc finger like (FEZL) is one of the candidate genes associated with mastitis resistance in dairy cattle. The present study was undertaken to evaluate FEZL geneexon 1 variation in Bos indicus and crossbred cattle. A total of 114 Karan Fries cattle and 111 Sahiwal cattle were genotyped for 12G/13G polymorphism associated with mastitis resistance/susceptibility.The results revealed a predominant presence of 13G allelic variant in Indian cattle with overall frequency of 98.2%. In Karan Fries cattle, 96.5% animals possessed 13G/13G homozygous genotype while 3.5% animals possessed 12G/13G heterozyous genotype.In case of Sahiwal cattle all the animals genotyped were 13G/13G homozygotes.Absence of 12G allelic variant can be attributed as one of the several reasons for the relatively high incidence of mastitis in Sahiwal cattle. The observed inheritance of 12G resistant alleles in Karan Fries cattle might have been derived through introgression from exotic Friesian cattle.

Key words: FEZL gene, Cattle, Mastitis Resistance

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