1.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
Genomics, Proteomics & Bioinformatics 2020;18(3):333-340
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.
Evolution, Molecular
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Genome, Plant
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Genomics
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Phylogeny
;
Polyploidy
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Selaginellaceae/genetics*
Result Analysis
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