Cloning, expression, and polymorphism of the ECI1 gene in various pig breeds

doi:10.1016/S2095-3119(16)61624-6

Journal of Integrative Agriculture ›› 2017, Vol. 16 ›› Issue (08): 1789-1799.DOI: 10.1016/S2095-3119(16)61624-6

收稿日期:2016-08-31 出版日期:2017-08-20 发布日期:2017-08-02

Cloning, expression, and polymorphism of the ECI1 gene in various pig breeds

LU Yun-feng^{1, 2}, CHEN Ji-bao², ZHANG Bo¹, LI Qing-gang^{1, 3}, WANG Zhi-xiu¹, ZHANG Hao¹, WU Ke-liang¹

¹ College of Animal Science and Technology, China Agricultural University, Beijing 100193, P.R.China
² School of Life Science and Technology, Nanyang Normal University, Nanyang 473061, P.R.China
³ Institute of Animal Sciences and Veterinary Medicine, Anhui Academy of Agricultural Sciences, Hefei 230031, P.R.China

Received:2016-08-31 Online:2017-08-20 Published:2017-08-02
Contact: Correspondence WU Ke-liang, Tel/Fax: +86-10-62734767, E-mail: liangkwu@cau.edu.cn
About author:LU Yun-feng, E-mail: yunflu@163.com;
Supported by:
This work was supported by the National Major Special Project on New Varieties Cultivation for Transgenic Organisms, China (2016ZX08009-003-006), the National Key Technology Research and Development Program of China (2012BAD03B03), the Scientific Research Foundation for Advanced Talents, Nanyang Normal University, China (ZX2014071), and the Program for Changjiang Scholar and Innovation Research Team in University, China (IRT1191).

摘要/Abstract

Abstract: The enzyme Δ³,Δ²-dienoyl-CoA isomerase (ECI1) plays a crucial role in the mitochondrial β-oxidation of fatty acids with a double-bond in odd and even positions. The ECI1 gene might be a qualified candidate for studies pertaining to lipid deposition and meat quality in swine. In the present study, ECI1 cDNA of the Tibetan pig was obtained by in silico cloning and verified by PCR analysis. Single-nucleotide polymorphisms (SNPs) of ECI1 were screened by PCR-sequencing and genotypes of those SNPs were tested by PCR-restriction fragment length polymorphism (PCR-RFLP) in Diannan small-ear pigs (DSP, n=40), Tibetan pigs (TP, n=60) and Yorkshire pigs (YP, n=30). The expression levels of ECI1 were analyzed by real-time quantitative PCR and Western blotting in tissues of the liver, backfat, and longissimus dorsi (LD) muscle of DSP (n=8), TP (n=8) and YP (n=8). Single factor linear correlation analysis was applied separately for each breed to evaluate correlations between ECI1 gene expression in the LD muscle and intramuscular fat (IMF) content. We obtained an ECI1 gene length of 1 401 bp from the cDNA that contained a full coding region of 909 bp. Three novel SNPs (g.42425337G>A; g.42424666A>G; and g.42422755A>G) were detected, and only g.42424666A>G exhibited three genotypes among the three breeds. The ECI1 expression levels in the LD muscle of DSP and TP were significantly higher than that of YP (P<0.05). Moreover, TP had the highest ECI1 expression in backfat (P<0.01), and a positive correlation was observed between gene expression and IMF content. The results suggest that differences in ECI1 gene expression might be related to lipid deposition and meat quality in pig.

Key words: ECI1 gene , lipid deposition , mRNA expression , pig , single-nucleotide polymorphism , Western blotting

. [J]. Journal of Integrative Agriculture, 2017, 16(08): 1789-1799.

LU Yun-feng, CHEN Ji-bao, ZHANG Bo, LI Qing-gang, WANG Zhi-xiu, ZHANG Hao, WU Ke-liang . Cloning, expression, and polymorphism of the ECI1 gene in various pig breeds[J]. Journal of Integrative Agriculture, 2017, 16(08): 1789-1799.

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Cloning, expression, and polymorphism of the ECI1 gene in various pig breeds

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