Table 2. Results from analysis of molecular variance (AMOVA) of population structure in Cyclina sinensis.

Marker/Grouping	Source of variation	d.f.	Φ-Statistics	% of variation	P value
COI	Among groups	2	ΦCT = 0.732	73.3	0.0025
(Group I: 1–16; II: 17–20; III: 21)*	Among populations within groups	18	ΦSC = 0.212	5.7	< 0.0001
	Within populations	314	ΦST = 0.790	21.0	< 0.0001
ITS-1	Among groups	2	ΦCT = 0.876	87.6	0.0004
(Group I: 8, 9, 11, 13–16; II: 17–20; III: 21)*	Among populations within groups	9	ΦSC = 0.084	1.0	0.0140
	Within populations	90	ΦST = 0.886	11.4	< 0.0001

Significant P values are bolded. * Populations were assigned to three groups consistent with sea basins. See Table 1 for site number.