Rice Science ›› 2017, Vol. 24 ›› Issue (1): 56-60.DOI: 10.1016/j.rsci.2016.06.008

• Orginal Article • Previous Articles    

Test of Small RNA Sequencing Repeatability in Rice

Hong-zheng Sun, Ting Peng, Jing Zhang, Jun-zhou Li, Yan-xiu Du(), Quan-zhi Zhao()   

  1. Collaborative Innovation Center of Henan Grain Crops / Key Laboratory of Rice Biology in Henan Province / Agronomy College, Henan Agricultural University, Zhengzhou 450002, China
  • Received:2016-04-10 Accepted:2016-06-06 Online:2017-01-10 Published:2016-11-01

Abstract:

Deep sequencing of small RNAs (sRNA) is widely used in sRNAs studies in plants. In order to investigate the sequencing frequency variation of sRNAs, the same sRNA samples from rice grains were sequenced twice using deep sequencing technique. The sRNAs were classified into three categories, high abundance (> 100 RPM), medium abundance (10-100 RPM) and low abundance (1-10 RPM). According to the repeat sequencing data of the same sample, highly expressed sRNAs (> 100 RPM) were less subject to random drift, and 95% of the sRNAs Log2 ratio between two samples fell between -0.649 and 0.558. The same trend was observed in mediumly expressed sRNAs (10-100 RPM), and 95% of the Log2 ratio fell between -0.535 and 0.759. As to lowly expressed sRNAs (1-10 RPM), 95% of the Log2 ratio varied between -1.009 and 1.011. These results can be used as a theoretical guide to find differentially expressed sRNAs in sRNA studies in plants.

Key words: rice, deep sequencing, small RNA, differential expression, random drift