Indian Journal of Animal Research

  • Chief EditorK.M.L. Pathak

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Indian Journal of Animal Research, volume 51 issue 2 (april 2017) : 223-226

Novel SNPs in ATP1B2 Gene and their Association with Heat Tolerance Indicator Traits in Sahiwal Cattle

Nishant Verma, I.D. Gupta*, Archana Verma, Rakesh Kumar, Ramendra Das
1<p>ICAR-National Dairy Reserach Institute, Karnal-132 001, India.</p>
Cite article:- Verma Nishant, Gupta* I.D., Verma Archana, Kumar Rakesh, Das Ramendra (2015). Novel SNPs in ATP1B2 Gene and their Association with Heat Tolerance Indicator Traits in Sahiwal Cattle . Indian Journal of Animal Research. 51(2): 223-226. doi: 10.18805/ijar.5725.

Heat Shock Proteins (HSPs) are expressed in response to heat stress and the polymorphism in HSP genes at single nucleotide level is reported to be associated with heat tolerance and production performance traits in cattle. ATP1B2 gene was mapped to Bos taurus autosome 19 (BTA 19) spanning nearly 4310bp, comprising 7 Exons and 6 Introns. The present study was conducted in Sahiwal cows (n=108) raised under sub-tropical climate with the objectives to identify SNPs in targeted regions (Intron 2, 4 and Exon 3, 5) of ATP1B2 gene and to analyze their association with heat tolerance traits in Sahiwal cows. Respiration rate (RR) and rectal temperature (RT) were recorded during probable extreme hours in winter, spring and summer seasons. Heat tolerance coefficient (HTC) was also calculated to check the adaptability of the animals during the period of heat stress. The comparative sequence analysis revealed a total of two SNPs in Intron 2 of ATP1B2 gene i.e. g.2243G>A and g.2366T>C. Out of these two identified SNPs, only one SNP i.e. g.2243G>A was found to be significantly (PC, RR, RT and HTC were having non-significant association with the different genotypes i.e. TT and TC. These findings suggest that AA and GA genotype of SNP g.2243G>A of ATP1B2 gene can be utilized as potential marker for propagating thermo-tolerant cattle.

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