qRT-PCR validation of target genes in ‘LA1777’ (a) and ‘Hezuo908’ (b) tomato. The reference gene was Actin. All reactions were repeated three times. Normalized target gene expression amount at 1 h without chilling treatment was arbitrarily set to 1. Differences between the NT and CT libraries were tested with a T test. *indicates a significant difference between the two libraries (<0.05).