Additional file 6: of Transcriptomic analysis reveals adaptive strategies to chronic low nitrogen in Tibetan wild barley QuanXiaoyan ZengJianbin ChenGuang ZhangGuoping 2019 Figure S2. Hierarchical cluster of DEGs at three time points in XZ149 and XZ56. The samples and treatments are displayed above each column. Genes are displayed by different colors and relative levels of expression are showed by a color gradient from low (green) to high (red). (PNG 142 kb)