Table 2 AMOVA of mtDNA and ptDNA haplotype variation in Abies chensiensis and A. fargesii

Species	Source of variation	d.f.	SS	VC	V%	F-statistic
mtDNA haplotype
All	Among species	1	3.214	0.003	1.19	F_CT=0.012
	Among populations within species	23	56.956	0.244	87.81	F_SC=0.889^*
	Within populations	229	6.992	0.031	11.00	F_ST=0.890^*
	Total	253	67.161	0.278
A. chensiensis	Among populations	9	24.202	0.280	86.99	F_ST=0.870^*
	Within populations	86	3.600	0.042	13.01
	Total	95	27.802	0.322
A. fargesii	Among populations	14	32.754	0.223	90.37	F_ST=0.904^*
	Within populations	143	3.392	0.024	9.63
	Total	157	36.146	0.246
ptDNA haplotype
All	Among species	1	0.835	0.003	0.79	F_CT=0.008
	Among populations within species	23	24.412	0.078	21.70	F_SC=0.215^*
	Within populations	229	64.757	0.283	79.08	F_ST=0.209^*
	Total	253	90.004	0.358
A. chensiensis	Among populations	9	12.264	0.117	31.17	F_ST=0.312^*
	Within populations	86	22.184	0.258	68.83
	Total	95	34.448	0.375
A. fargesii	Among populations	14	12.149	0.055	15.54	F_ST=0.155^*
	Within populations	143	42.573	0.298	84.46
	Total	157	54.722	0.353

Abbreviations: AMOVA, analysis of molecular variance; d.f., degrees of freedom; mtDNA, mitochondrial DNA; ptDNA, plastid DNA; SS, sum of squares; VC, variance component. ^*P<0.001, 1000 permutations.

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