Fig. 4

Heatmap diagrams of the differentially expressed unigenes related to ambient temperature and photoperiod. The two heatmaps are used to show the relative expression trends of key candidate genes which were probably associated with temperature or photoperiod changes, and possibly involved in impacting CR characteristic of ‘Hang Baishao’. Red cell means up-regulation and green cell means down-regulation. Bars on the top indicate the range of gene expression change, values (−3 to +3) of which were normalized from FPKMs value of unigene by using Genesis 1.7.6. On the right side of two heatmap diagrams, the first column is Gene ID, the second is Arabidopsis homology, and the third one is gene name of Arabidopsis. Abbreviations of partial important unigenes, and their closely related factors or processes were labeled on the right side of these three columns. The expression patterns of Unigene003256, Unigene050870, Unigene022263 and Unigene005409 based on RNA-Seq data had been analyzed in our previous publication [11]. We added the expression data of these four genes here again in order to facilitate the relevant presentation and discussion in the current study, and also facilitate the comparative analysis of RNA-Seq data of 2012–2013 and qRT-PCR data of 2015–2016 for Unigene022263 and Unigene005409