De novo genome assemblies of two cryptodiran turtles with ZZ/ZW and XX/XY sex chromosomes provide insights into patterns of genome reshuffling and uncover novel 3D genome folding in amniotes

Table 1.

Summary statistics of the de novo genome assemblies of Staurotypus triporcatus and Apalone spinifera

Species (diploid number) Staurotypus triporcatus (2n = 54) Apalone spinifera (2n = 66)
Parameter Mbp Number of scaffolds L (#Chrom.pairs) Mbp Number of scaffolds L (#Chrom.pairs)
Total assembly 1756.72 29,514 1904.74 6700
N50 and L50 111.86 5 125.90 5
N count 122.37 22.03
Gaps 0.17 0.22
Average scaffold size 0.06 0.28
Largest scaffold size 296.41 317.79
N90 and L90 48.63 13 23.12 21
N and L when #scaffolds = #chromosome pairs 1717.02 27 largest L98 1892.59 33 largest L99
BUSCO Lineage set→ Eukaryota Vertebrata Tetrapoda Eukaryota Vertebrata Tetrapoda
Number of BUSCO genes 303 2586 3950 303 2586 3950
Number of complete genes (%) 274 (90.4%) 2479 (95.9%) 3718 (94.2%) 253.9 (83.8%) 2286 (88.4%) 3381.2 (85.6%)
Number of singleton genes (%) 270 (89.1%) 2467 (95.4%) 3692 (93.5%) 250.9 (82.8%) 2273.1 (87.9%) 3365.4 (85.2%)
Number of duplicated genes (%) 4 (1.3%) 12 (0.5%) 26 (0.7%) 3.03 (1%) 12.9 (0.5%) 15.8 (0.4%)
Number of fragmented genes (%) 10 (3.3%) 63 (2.4%) 126 (3.2%) 16.1 (5.3%) 178.4 (6.9%) 308.1 (7.8%)
Number of missing genes (%) 19 (6.3%) 44 (1.7%) 106 (2.6%) 33.03 (10.9%) 121.5 (4.7%) 260.7 (6.6%)
  • (#Chrom.pairs) number of chromosome pairs.

This Article

  1. Genome Res. 34: 1553-1569

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