Biotechnology Bulletin ›› 2020, Vol. 36 ›› Issue (10): 40-48.doi: 10.13560/j.cnki.biotech.bull.1985.2020-0137

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Comparative Analysis on miRNA Transcriptome of Skeletal Muscle Between Wuzhishan Pig and Landrace

SUN Rui-ping1,2(), WANG Feng1, CHAO Zhe1,2, LIU Hai-long1,2, XING Man-ping1, LIU Quan-wei1,2, ZHENG Xin-li1, HUANG Li-li1, WEI Li-min1,2()   

  1. 1. Institute of Animal Science and Veterinary Medicine,Hainan Academy of Agricultural Science,Haikou 571100
    2. Hainan Key Lab of Tropical Animal Reproduction & Breeding and Epidemic Disease Research,Haikou 571100
  • Received:2020-02-15 Online:2020-10-26 Published:2020-11-02
  • Contact: WEI Li-min E-mail:ruiping937@126.com;liminedu@126.com

Abstract:

In order to investigate the differences of microRNAs(miRNAs)in growth and development of skeletal muscle between Wuzhishan and Landrace pigs and to explore the effects of differential miRNAs on post-transcriptional regulation of skeletal muscle development,we used the longissimus dorsi muscle of 8-month-old Wuzhishan pig and of Landrace pig to screen their differential miRNAs related to the development of skeletal muscle via Solexa sequencing combined with bioinformatics analysis. A total of 311 known porcine miRNAs were identified from 2 libraries,300 and 293 known miRNAs were identified in Wuzhishan and Landrace pigs respectively,and new identified miRNAs were 96 and 79 respectively. Fifteen of 17 screened differential miRNAs significantly down-regulated in the Landrace pig,while 2 miRNAs significantly up-regulated. A total of 574 target genes were predicted by the 17 differential miRNAs that enriched to 30 significantly different biological pathways(P<0.05),of which 5 miRNAs enriched to the insulin signaling pathway(ssc-miR-362,ssc-miR-455-3p,ssc-miR-497,ssc-miR-499-5p,and ssc-miR-874). This study reveals the differences in the growth and development of skeletal muscle between 8-month-old Wuzhishan pig and Landrace pig at the level of miRNA and provides basic data for further research on the molecular mechanism of skeletal muscle growth.

Key words: Wuzhishan pig, skeletal muscle, microRNAs, Solexa sequencing