›› 2016, Vol. 43 ›› Issue (8): 2081-2094.doi: 10.16431/j.cnki.1671-7236.2016.08.022

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Polymorphism Analysis of Taste Receptor Family 1 Member Gene Exons in Sheep

XUAN Jun-li1,2, MA Xiao-meng1, YUAN Ze-hu1, HU Shi-jin1, WANG Hui-hua1, WEI Cai-hong1, ZHAO Fu-ping1, ZHANG Li1, DU Li-xin1   

  1. 1. Institute of Animal Sciences, Chinese Academy of Agricultural Sciences, Beijing 100193, China;
    2. College of Animal Science and Technology, Gansu Agricultural University, Lanzhou 730070, China
  • Received:2016-02-15 Online:2016-08-20 Published:2016-08-23

Abstract:

This study was aimed to investigate the distribution of genetic polymorphism of taste receptor family 1 member (T1R) gene between Ujimqin sheep and Hu sheep.DNA pools direct sequencing method and MALDI-TOFMS method were used to analyze genetic variation of T1R genes in 172 sheep of two Chinese sheep strains of Mongolian,and bioinformatics software predicted what impact polymorphic loci had to mRNA and protein secondary structure of T1R gene.The results showed that 9 SNPs were screened in T1R gene of two groups.Chi-square test for independence was taken to find the genotypes of the 5 SNPs which were significantly different between two sheep population(P<0.05),SNP2 located in TAS1R1 gene,SNP4,SNP7 and SNP8 located in TAS1R2 gene,SNP10 located in TAS1R3 gene.SNP2,SNP7 and SNP10 were silent mutations.SNP2 and SNP10 lead to corresponding gene mRNA secondary structure and the minimum free energy change,while the SNP7 only lead to the minimum free energy changes.SNP4 and SNP8 were missense mutations,the two missense mutations respectively led to asparagine(Asn) into serine (Ser),threonine (Thr) into methionine (Met),and according to online software forecast,the protein secondary structure of TAS1R2 gene all changed in mutations before and after.

Key words: sheep; taste receptor gene; polymorphism; boinformatics

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