Acta Horticulturae Sinica ›› 2021, Vol. 48 ›› Issue (3): 439-455.doi: 10.16420/j.issn.0513-353x.2020-0421

• Research Papers • Previous Articles     Next Articles

Indentification and Expression Analysis of Trihelix Transcription Factor Family in Pear

HAN Wenlong1, ZHU Zhen1, LI Junru1, CHEN Tianzhe1, LI Guohui1, SU Xueqiang1, JIN Qin1,2, CHENG Xi1,2, CAI Yongping1,2,*()   

  1. 1School of Life Science,Anhui Agricultural University,Hefei 230036,China
    2Anhui Provincial Engineering Technology Center for Development & Utilization of Regional Characteristic Plants,Hefei 230036,China
  • Received:2020-09-28 Online:2021-03-25 Published:2021-04-02
  • Contact: CAI Yongping


Trihelix transcription factors(TFs)binded to light-responsive GT elements are called GT transcription factors. This study not only identified 16 members of the Trihelix family from the pear genome,named PbGT1-PbGT16 in turn,but also identified 11 and 16 members of the Trihelix family respectively from the genomes of strawberry and peach belonging to the Rosaceae family like pear. Chromosome localization showed that the Trihelix family members of pear,strawberry and peach were distributed on 12,6 and 8 chromosomes,respectively. Segmental duplication events were found in the Trihelix family of pear by gene duplication events analysis. The clustering result of interspecific phylogenetic tree showed that the Trihelix family members of pear,strawberry and peach were divided into six subfamilies and the Trihelix family members of pear(PbGTs) belong to the GT-2,Subfamily O and SIP1 subfamilies. Combined with evolutionary relationship and qRT-PCR verification,PbGT15 may be involved in regulating lignification of pear fruit stone cells.

Key words: pear, Trihelix transcription factors, comparative genomics, expression analysis, lignification

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