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Table 1 Comparison of general features of fern chloroplast genomes

From: Complete chloroplast genome sequence of a tree fern Alsophila spinulosa: insights into evolutionary changes in fern chloroplast genomes

  Alsophila spinulosa Adiantum capillus-veneris Psilotum nudum Angiopteris evecta
Total Length (bp) 156661 150568 138829 153901
   GC content (%) 40.43 42.01 36.03 35.48
LSC Length (bp) 86308 82282 84617 89709
   GC content (%) 39.62 40.82 33.63 33.66
SSC Length (bp) 21623 21392 16304 22086
   GC content (%) 37.85 37.10 29.97 33.05
IR Length (bp) 24365 23447 18954 21053
   GC content (%) 43.02 46.33 44.00 40.65
Number of genea 117 117 118 121
   Protein gene 85 84 81 85
   rRNA gene 4 4 4 4
   tRNA gene 28 29b 33 32
  1. a The genes in IRs were considered only once
  2. b trnSeC was counted here according to the annotation in GenBank and the reference [10]