Table 1. The National Center for Biotechnology Information (NCBI) reference sequence assembly and accession information of W chromosomes in avian species

Species	Common name	Reference sequence assembly accession1	Annotation release	Reference sequence accession	Size (Mb)
Gallus gallus	Chicken	GCF_000002315.5	103	NC_006126.4	5.16
Coturnix japonica	Japanese quail	GCF_001577835.1	100	NC_029546.1	12.12
Meleagris gallopavo	Turkey	GCF_000146605.2	102	NC_015042.2	26.06

Contributors: International Chicken Genome Consortium (Chicken); McDonnell Genome Institute - Washington University School of Medicine (Japanese quail); Turkey Genome Consortium (Turkey).