ACTA AGRICULTURAE BOREALI-SINICA ›› 2010, Vol. 25 ›› Issue (3): 14-18. doi: 10.7668/hbnxb.2010.03.004

Special Issue: Animal husbandry

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Polymorphism at 3'UTR of the Heat Shock Protein 70 Gene and Its Relationship with Thermal Tolerance in Chinese Holstein

DU Fang-lei1, 2, WANG Hong-mei2, HUANG Jin-ming2, LI Jian-bin2, ZHONG Ji-feng3, ZHANG Ting-rong3, LIU Jian-fei2, LI Qiu-ling2   

  1. 1. Dairy Cattle Research Center, Shandong Academy of Agricultural Science, Ji’nan 250100, China;
    2. College of Animal Science, Qingdao Agricultural University, Qingdao 266109, China
  • Received:2010-03-09 Published:2010-06-28

Abstract: Heat shock protein 70( HSP70) gene was regarded as a candidate gene for thermo resistance of cows.In this study,a 549 bp fragment of HSP70 gene of Chinese Holstein was amplified by polymerase chain reaction( PCR), the polymorphisms of three loci of HSP70 gene were detected by PCR-SSCP technique.By sequencing, three point mutations, G/C at nucleotide 6 400,C/T at nucleotide 6 600 and G/A at nucleotide 6 601,were identified in HSP70 gene sequence.χ2 test indicated that three polymorphisms in the population unfitted with Hardy-Weinberg equilibrium( P <0.01).Meanwhile, the relationship between milk performance and heat tolerance was analyzed.The results showed that in the three loci, the different genotypes of HSP70 gene had no significant influence on milk protein percent and fat percent,but had significant influence on 305-day milk yield.Individuals with genotype BB showed higher 305-day milk yield than those with genotypes AA and CC( P <0.05).And the cows with genotype BB showed lower potassium content in erythrocytes ( PCE) and decrease rate of milk yield than those with genotypes AA and CC.It indicated that BB genotype was the advantageous genotype.These mutations could be used in MAS for anti-heat stress cows in our breeding program.

Key words: Holstein cows, HSP70 gene, Polymorphism, Heat stress, PCR-SSCP

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Cite this article

DU Fang-lei,, WANG Hong-mei, HUANG Jin-ming, LI Jian-bin, ZHONG Ji-feng, ZHANG Ting-rong, LIU Jian-fei, LI Qiu-ling, WANG Chang-fa. Polymorphism at 3'UTR of the Heat Shock Protein 70 Gene and Its Relationship with Thermal Tolerance in Chinese Holstein[J]. ACTA AGRICULTURAE BOREALI-SINICA, 2010, 25(3): 14-18. doi: 10.7668/hbnxb.2010.03.004.

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