Fig. 7

Expression analysis via qRT-PCR of select genes in ‘Qinguan’ (QG) and ‘Honeycrisp’ (HC) in response to long-term drought stress. ‘WWQG’, ‘DSQG’, ‘WWHC’ and ‘DSHC’ indicate the well-watered ‘Qinguan’, drought-stressed ‘Qinguan’, well-watered ‘Honeycrisp’ and drought-stressed ‘Honeycrisp’, respectively. Gene expression profiles are shown using hierarchical clustering method. Gene IDs are listed on the right. Candidate gene is marked with red spot. Color gradient from blue to red represents range in expression from lower to higher