Table 4. Analysis of molecular variance (AMOVA) of 483 AFLP loci for 28 Mikania micrantha populations from six introduced regions in southern China.

	Variance components	Percentage of total variation	P	Φ statistics
Among regions	2.884	4.74	<0.001	ΦCT = 0.0474
Among populations within regions	17.404	28.61	<0.001	ΦSC = 0.3004
Within populations	40.538	66.65	<0.001	ΦST = 0.3335

The P-value was calculated by a permutation procedure based on 1023 replicates.