Figure 2. The frequency distribution in the F₂ population of 16 Chinese cabbage traits.

The traits analyzed for the plants are as follows: PH, Plant height; PD1, Plant diameter 1; PD2, Plant diameter 2; LL, Leaf length; LWh, Leaf width; PL, Petiole length; PW, Petiole width; PLL, Petiole with leaf length; LWg, Leaf wing; LS, Leaf shrink; CLC, Core leaf color; LC, Outer leaf color measured by naked eye; LCL*, Outer leaf color measured by CR-300 type colorimeter (from black to white); LCa*, Outer leaf color measured by CR-300 type colorimeter (from green to red) LCb*, Outer leaf color measured by CR-300 type colorimeter b (from blue to yellow); CC, Inner and outer leaf; color contrast; PC, Petiole color; H, Heading; BL, Bolt length.