Distribution map of EST coverage and abundance of Arabidopsis thaliana, Zea mays and Vitis vinifera.

The species name is shown at the end of each chromosome model, and different gradient colors describe the abundance in each plant. Based on the alignment results, the abundance of EST sequences were divided into six parts, including the EST matched times of 0, 1–10, 11–20, 21–30, 31–40, >40 in Arabidopsis thaliana; 0, 1–8, 9–16, 17–24, 25–32, >32 in Zea mays; 0, 1, 2, 3, 4, >4 in Vitis vinifera, respectively.