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Molecular evolution of the poplar MIR169 gene family

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  • 1. College of Life Science and Technology, Central South University of Forestry and Technology, Changsha 410004, China; 
    2. College of Forestry, Central South University of Forestry and Technology, Changsha 410004, China; 
    3. Key Lab of Non-Wood Forest Products of State Forestry Administration, Changsha 410004, China

Received date: 2013-05-21

  Revised date: 2013-07-03

  Online published: 2013-10-25

Abstract

MicroRNAs (miRNAs) are a class of short non-coding RNAs found widely in eukaryotic organisms. The ptc-MIR169 gene family, which consists of 33 members, is the largest miRNA gene family in poplar (Populus trichocarpa). It is significant to analyze the evolution of the ptc-MIR169 gene family in order to understand the evolutionary mechanisms of miRNAs in poplar. In the present study, we investigated the molecular phylogeny, duplication, expression and target genes of the MIR169 gene family in poplar. Both tandem duplications and chromosome segmental duplications contributed to the expanding of ptc-MIR169 gene family, and the expression patterns diversified obviously among the gene family. These findings suggest that the ptc-MIR169 gene family is involved in complex regulatory networks, and plays significant roles in development and stress response in poplar. This paper provides a reference for the evolutionary study of miRNAs in poplar and related species in Salicaceae.

Cite this article

LIU Zhi-Xiang ZENG Chao-Zhen TAN Xiao-Feng . Molecular evolution of the poplar MIR169 gene family[J]. Hereditas(Beijing), 2013 , 35(11) : 1307 -1316 . DOI: 10.3724/SP.J.1005.2013.01307

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