Table 2.

Comparison of ITS2 genetic distance among different groups of seed plants.

Taxon	Genetic distance	Average value	95% Confidence interval	Variation		N
Spermatophyte	Intraspecific	1.19%	[1.06%, 1.32%]	[0, 64.00%]		2,476
	Sister species	3.76%	[3.20%, 4.32%]	[0.05%, 43.45%]		281
	Interspecific	7.77%	[7.75%, 7.80%]	[0, 84.53%]		293,277
Angiosperm	Intraspecific	1.20%	[1.06%, 1.34%]	[0, 64.00%]		2,247
	Sister species	3.98%	[3.36%, 4.59%]	[0.05%, 43.45%]		251
	Interspecific	7.88%	[7.85%, 7.91%]	[0, 84.53%]		285,837
Monocotyledon	Intraspecific	1.51%	[1.15%, 1.88%]	[0, 64.00%]		626
	Sister species	3.90%	[2.78%, 5.02%]	[0.37%, 20.73%]		62
	Interspecific	8.55%	[8.50%, 8.61%]	[0, 84.53%]		77,533
Dicotyledon	Intraspecific	1.08%	[0.95%, 1.21%]	[0, 43.19%]		1,621
	Sister species	4.00%	[3.27%, 4.73%]	[0.05%, 43.45%]		189
	Interspecific	7.69%	[7.66%, 7.71%]	[0, 69.07%]		226,832
Gymnosperm	Intraspecific	1.10%	[0.77%, 1.44%]	[0, 22.63%]		229
	Sister species	1.95%	[1.18%, 2.72%]	[0.40%, 8.23%]		30
	Interspecific	3.76%	[3.65%, 3.87%]	[0, 60.65%]		7,440
Pinidae	Intraspecific	1.00%	[0.55%, 1.44%]	[0, 19.07%]		113
	Sister species	1.73%	[0.97%, 2.48%]	[0.40%, 8.07%]		21
	Interspecific	4.87%	[4.72%, 5.02%]	[0, 20.98%]		3,343
Cycadidae	Intraspecific	0.98%	[0.32%, 1.63%]	[0, 22.63%]		79
	Sister species	1.64%	—	[0.55%, 2.82%]		4
	Interspecific	2.10%	[2.02%, 2.18%]	[0, 15.24%]		2,896
Gnetidae	Intraspecific	1.68%	[0.94%, 2.42%]	[0, 9.85%]		37
	Sister species	3.12%	—	[0.45%, 8.23%]		5
	Interspecific	4.68%	[4.22%, 5.14%]	[0, 60.65%]		1,201