Table 2.

Expression stability of the candidate reference genes calculated by NormFinder.

Rank	FD		XS		QH		Total
	Gene	Stability	Gene	Stability	Gene	Stability	Gene	Stability
1	GAPDH	0.082	GAPDH	0.1	TIP41	0.0	UBC	0.219
2	UBC	0.131	TIP41	0.1	EF-1α	0.1	TIP41	0.222
3	EF-1α	0.149	UBC	0.2	UBC	0.1	GAPDH	0.243
4	PP2A	0.236	EF-1α	0.3	GAPDH	0.3	PP2A	0.326
5	TIP41	0.386	PP2A	0.4	PP2A	0.3	EF-1α	0.464
6	ACTIN	0.439	CYP	0.6	ACTIN	0.7	ACTIN	0.58
7	α-TUB	0.517	ACTIN	0.7	α-TUB	0.8	CYP	0.719
8	β-TUB	0.68	α-TUB	0.7	CYP	0.9	α-TUB	0.747
9	CYP	0.719	β-TUB	0.9	SAMS	1.0	β-TUB	0.918
10	SAMS	1.019	SAMS	1.0	β-TUB	1.2	SAMS	0.949

FD, ‘Feng Dan’; XS, ‘Xi Shi’; QH, ‘Que Hao.’