Table 2. qRT–PCR confirmation of expression differences between strains for selected genes at 8 months.

Name	GO term	Microarray	qRT–PCR
Hmox1	Porphyrin metabolic process	1.4	1.2
Sod2	Mitochondrial envelope	1.3	1.2
Mt1	Response to metal ion	0.5	0.5
Mt2	Response to metal ion	0.5	0.6

Fold change values are expressed as C/B6a.