Fig. 2
Heat map of a result of HTRgene analysis for cold stress data. The heat map includes 425 response order preserving DEGs that are grouped into 12 response phase clusters, which were discovered by HTRgene analysis of 28 cold stress time-series sample datasets. The rows of the heat map are 12 response phase gene clusters, and the numbers in parentheses are the number of genes for each cluster. The columns of the heat map are four time-series samples with more than five time points: S1 to S4. The red or blue color of the heat map indicates up or down change in gene expression level compared to the time point before stress (T=0). The black lines represent the response time point of a cluster in each sample. The heat map shows response times of gene clusters (the black line) defined by the HTRgene method are clearly propagated along the time axis in a conserved ordering across multiple samples