Table 1 Metrics of the genomes of P. cf. gigantea and a selection of 6 reference species. * by considering only genes with intron(s). See also Figs. S2, S3 and S5 

nb of contigs/chromosomes

787

934

355

8

435

14

5470

1006

total length of assembly (bp)

8,806,768

9,049,943

13,873,624

9,102,324

63,472,444

23,292,622

192,006,978

72,475,329

mean length contigs/chromosomes (bp)

11,190.3

9689.45

39,080.63

1,137,790.5

145,913.66

1,663,758.71

35,101.82

72,043.07

GC content (%)

54.3

54.3

53.8

30.2

52.4

19.3

49.1

58.1

nb of protein coding genes

5270

5361

6606

4020

8862

5602

30,604

23,412

mean length of coding genes (bp)

1438.2

1450.3

1392.6

1865.0

5602.9

2488.6

4507.6

2704.7

nb of tRNA

14

14

231

45

150

45

0

0

nb of rRNA

27

25

0

5

420

28

0

0

nb of gene with intron(s)

2957

2981

2390

575

6801

3010

21,895

22,163

median length of the introns (bp)

28 [27–30]

28 [27–30]

95 [56–145]

65 [51–91]

467 [322–632]

140 [110–184]

372 [273–520]

81 [70–98]

mode of intron length (bp)

28

28

37

44

55

121

320

74

mean nb of introns per gene*

1.8

1.8

1.4

1.8

5.9

2.9

5.4

7.9

non-coding DNA (%)

16

16

37

24

68

47

74

50