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Single nucleotide polymorphism scanning and expression of the FRZB gene in pig populations

文献类型： 外文期刊

作者： Wang, Zhixiu 1 ; Li, Qinggang 2 ; Zhang, Bo 1 ; Lu, Yunfeng 3 ; Yang, Yuzeng 1 ; Ban, Dongmei 1 ; Zhang, Hao 1 ;

作者机构： 1.China Agr Univ, Natl Engn Lab Anim Breeding, Beijing 100193, Peoples R China

2.Anhui Acad Agr Sci, Inst Anim Sci & Vet Med, Hefei 230031, Anhui, Peoples R China

3.Nanyang Normal Univ, Sch Life Sci & Technol, Nanyang 473061, Henan Province, Peoples R China

关键词： FRZB;Growth traits;SNP;Gene expression;Pig

期刊名称：GENE （ 影响因子：3.688； 五年影响因子：3.329 ）

ISSN： 0378-1119

年卷期： 2014 年 543 卷 2 期

页码：

收录情况： SCI

摘要： Secreted frizzled-related protein 3 (sFRP3), encoded by the gene FRZB, is a member of the sFRP family with important roles in inhibition of the Wnt signalling pathway through competitive binding of the Wnt receptor. Here, we investigated pig FRZB as a candidate gene for growth traits and identified three polymorphic sites, an insertion (A-532B) and two SNPs (G636A and C650T) in its 5'-UTR The genotype distributions of G636A and C650T were significantly different among mini-type indigenous (Diannan Small-ear and Tibetan), normal indigenous (Laiwu and Huai), and introduced (large Yorkshire and Landrace) breeds. In semi-quantitative PCR expression analysis, expression of FRZB mRNA was abundant in tissues of hypophysis, longissimus dorsi muscle, and adipose tissues, and low in the heart, hypothalamus, and brain. Quantitative determination of mRNA level and protein expression analysis were corresponding. The results demonstrated that FRZB gene expression in longissimus dorsi muscle and liver tissue was significantly higher in Diannan Small-ear and Tibetan pigs than in the Large Yorkshire breed (P < 0.05); however, in back fat tissue, the expression was significantly higher in Diannan Small-ear pig than in Tibetan or Large Yorkshire breeds (P < 0.05). Given the known growth and fat characteristics of the breeds, these results indicate that FRZB expression has a negative association with muscle growth and a positive association with fat deposition. In conclusion, FRZB may be a major candidate gene for growth traits in pigs. (C) 2014 Elsevier B.V. All rights reserved.

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