Table 2. Analyses of molecular variance (AMOVA) of Dioscorea humilis populations based on microsatellite data.

Source of variation (groups)	Sum of squared deviations (SSD)	d.f.	Variance components	% of the total variance
1. Dioscorea humilis s.l.
Among populations	443.049	16	0.39637	19.03
Within populations	1852.940	1099	1.68602	80.97
2. Taxonomic membership: humilis (Dhh01-Dhh15) vs . polyanthes (Dhp01. Dhp02)
Among groups	150.915	1	0.53219	21.37
Among populations within groups	292.314	15	0.27222	10.93
Within populations	1852.940	1099	1.68602	67.70
3. Dioscorea humilis subsp. humilis s.l.
Among populations	288.727	14	0.29176	15.00
Within populations	1589.255	961	1.65375	85.00
4. Geographical membership of D. humilis subsp. humilis : northern (Dhh01–08), vs . southern (Dhh09–15)
Among groups	133.969	1	0.25056	12.15
Among populations within groups	154.758	13	0.15781	7.65
Within populations	1589.255	961	1.65375	80.20
5. Genetic membership (excluding D. humilis susbp. polyanthes ): cluster Dhh01, Dhh05, Dhh07-Dhh08 vs . cluster Dhh02-Dhh04, Dhh06 vs . Dhh09-Dhh10 vs . Dhh11-Dhh15
Among groups	194.783	3	0.23571	11.81
Among populations within groups	93.944	11	0.10659	5.34
Within populations	1589.255	961	1.65375	82.85