China Animal Husbandry and Veterinary Medicine ›› 2020, Vol. 47 ›› Issue (10): 3058-3068.doi: 10.16431/j.cnki.1671-7236.2020.10.003

• Biotechnology • Previous Articles     Next Articles

Whole Genome Methylation Variation Analysis of Longissimus Dorsi Between Tan Sheep and Hu Sheep

YUE Caijuan, LIANG Xiaojun, WANG Xiuqin, MA Qing, MA Jifeng, ZHANG Junli, WANG Xiaowei, Eerhehua   

  1. Institute of Animal Science, Ningxia Academy of Agriculture and Forestry, Yinchuan 750002, China
  • Received:2020-04-01 Online:2020-10-20 Published:2020-10-17

Abstract: It aimed to identify the differential methylation region (DMR) and differential methylation gene (DMG) through the analysis of the genome-wide methylation difference of the longest muscle of the sheep's back of different breeds of sheep,and laid the foundation for the analysis of the differences in sheep skeletal muscle development.In this study,one-year-old sheep(Tan sheep and Hu sheep and Tan-Hu F2) were sanned by the whole genome bisulfite sequencing method(WGBS).The degree of methylation and differentially methylated region in the whole genome DNA of longissimus dorsi(LD) muscle were studied to explore the difference of DNA methylation in level in sheep.The results showed that the methylation (mC) rates of cytosine (C) were 3.55%,3.18% and 3.56% in Tan sheep,Hu sheep and Tan-Hu F2,respectively.A total of 97 731 DMRs and 10 784 related DMGs were detected.In CG,CHH and CHG sequences,the methylation levels of the three groups were not significantly different.419 GO terms and 20 related signal pathways were detected by GO and KEGG analysis,respectively,which were showed to be significantly enriched in cellular process,cell part,binding,long-term depression,and so on.Five candidate genes,ACTA2、ROCK1、CALD1、MYH3 and MYH10 were sreened out in muscle tissues.This study provided genome-wide methylation of pattern of three groups (Tan sheep and Hu sheep and Tan-Hu F2).The results provided reference information for the epigenetic study of Tan sheep and screened candidate genes related to muscle development and meat quality.

Key words: sheep; longissimus dorsi; genome-wide; methylation

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