Figure 4

Nucleotide diversity of tf alleles in hexaploids (black) and tetraploids (grey). The X-axis shows the abbreviation of each sampled location, and Y- axis indicates value of nucleotide diversity. Geographic areas of the sampled locations are indicated by curly braces on the top. JH, Jing-Hang Grand Canal; L-YzR, lower basin of Yangtze River; M-YzR, middle basin of Yangtze River; U-YzR, upper basin of Yangtze River; NW, northwest of China; NE, northeast of China; YR, Yellow river; U-PR, upper basin of Pearl River.