Table 1 Assembly contiguity metrics of chicken genomes by version
MetricsGallus_gallus-4.0Gallus_gallus-5.0
Total base length (bp)1,046,932,0991,230,258,557
Total spanned gapsa8246358
Total contigs27,04124,693
N50 contig length (bp)b279,7502,894,815
Placed contigs (bp)c1,014,655,9631,091,712,069
Unplaced contigs (bp)32,120,124138,199,872
Total scaffolds16,84723,870
N50 scaffold length (bp)b12,877,3816,379,610
  • a Total spanned gaps are calculated on ordered and oriented chromosome sequences.

  • b N50 is the percentage of the genome assembly that is the measured length metric or greater.

  • c Placed contigs refer to chromosome sequences with order and orientation or just chromosomal assignment without order or orientation.