Table 2.

Stability values and ranking order of seven candidate reference genes obtained of all analysed samples from Idared and Free Redstar based on results from geNorm, NormFinder, BestKeeper, Delta Ct and Comprehensive ranking.

Ranking	Genorm		NormFinder		BestKeeper		Delta Ct		Comprehensive ranking
	gene	M-value*	gene	Stability value*	gene	Std dev [ ± CP]*	gene	Average of st dev*	Gene	Geomean of ranking values (GM)*
1	proC	0.550	proC	0.077	ffh	0.46	proC	0.55	proC	1.41
2	recA	0.558	pykA	0.091	pykA	0.48	recA	0.56	recA	2.06
3	pykA	0.561	recA	0.094	recA	0.49	pykA	0.57	ffh	2.63
4	ffh	0.603	ffh	0.104	proC	0.50	ffh	0.60	pykA	2.63
5	gyrA	0.631	gyrA	0.123	gyrA	0.57	gyrA	0.63	gyrA	5.23
6	rpoB	0.661	rpoB	0.135	rpoB	0.59	rpoB	0.66	rpoB	5.73
7	glyA	0.747	glyA	0.163	glyA	0.67	glyA	0.75	glyA	7.00

*As lower value as more stable gene.