Table 2.

Four species of poplar statistics of the genome quality for the final assembly.

Species	P. nigra ‘NL-1976’ nigraHap1	P. nigra ‘NL-1976’ nigraHap2	P. nigra ‘NL-1976’	P. deltoides ‘I-69’	P. nigra betulifolia L., 1753	P. trichocarpa Nisqually-1 Trahap1	P. trichocarpa Nisqually-1 Trahap2
Genome size (Mb)	385.18	390.48	389.43	424.59	414.18	391.76	397.43
GC content (%)	33.6	33.72	33.64	33.34	35	33.86	33.91
Number of Gap	0	0	0	0	277	6	2
N50 (Mb)	22.31	22.05	22.04	21.51	22.49	21.8	20.9
Maximum scaffold sequence length (bp)	48,831,123	49,313,916	48,827,307	53,044,917	50,570,738	52,164,823	52,084,038
Minimum scaffold sequence length (bp)	12,830,606	13,255,773	6,224,961	15,239	55,380	15,726	10,965
Average length (bp)	20,272,893.4	20,551,560.4	18,544,479	1,608,294.8	16,567,390	3,211,530.1	1,252,100
Complete BUSCOs (%)	98.7	98.8	98.7	98.6	98. 4	98.5	98.2