Genomics, Proteomics & Bioinformatics (Jun 2020)

Paleo-polyploidization in Lycophytes

  • Jinpeng Wang,
  • Jigao Yu,
  • Pengchuan Sun,
  • Chao Li,
  • Xiaoming Song,
  • Tianyu Lei,
  • Yuxian Li,
  • Jiaqing Yuan,
  • Sangrong Sun,
  • Hongling Ding,
  • Xueqian Duan,
  • Shaoqi Shen,
  • Yanshuang Shen,
  • Jing Li,
  • Fanbo Meng,
  • Yangqin Xie,
  • Jianyu Wang,
  • Yue Hou,
  • Jin Zhang,
  • Xianchun Zhang,
  • Xiu-Qing Li,
  • Andrew H. Paterson,
  • Xiyin Wang

Journal volume & issue
Vol. 18, no. 3
pp. 333 – 340

Abstract

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Lycophytes and seed plants constitute the typical vascular plants. Lycophytes have been thought to have no paleo-polyploidization although the event is known to be critical for the fast expansion of seed plants. Here, genomic analyses including the homologous gene dot plot analysis detected multiple paleo-polyploidization events, with one occurring approximately 13–15 million years ago (MYA) and another about 125–142 MYA, during the evolution of the genome of Selaginella moellendorffii, a model lycophyte. In addition, comparative analysis of reconstructed ancestral genomes of lycophytes and angiosperms suggested that lycophytes were affected by more paleo-polyploidization events than seed plants. Results from the present genomic analyses indicate that paleo-polyploidization has contributed to the successful establishment of both lineages—lycophytes and seed plants—of vascular plants.

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