Fig. 1

Genome-wide identification of VQs in 50 species. a Phylogenetic tree of 50 species. The tree was constructed according to the data retrieved from the NCBI Taxonomy database (http://www.ncbi.nlm.nih.gov/taxonomy). b Genome size (Mb), numbers of annotated protein coding genes and numbers of identified TPSs in these 50 species. We identified VQs in each species using HMM profiling searches. We constructed the HMM profiling using the key motif sequences from the Pfam database (PF05678, https://pfam.xfam.org/). * VQs in Arabidopsis thaliana, Brassica rapa, Glycine max, Vitis vinifera, Zea mays and Oryza sativa were previously identified and their references were also listed