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Comparisons of heterosis in the super-hybrid rice combination Xieyou 9308. (A) The upper panel illustrates the cross between Xieqingzao B and R9308 at the tillering stage. Left, Xieqingzao B; middle, Xieyou 9308; right, R9308. The lower panel shows the cross at the heading stage. Left, R9308; middle, Xieyou 9308; right, Xieqingzao B. (B) Root traits of Xieyou 9308, Xieqingzao B, and R9308 at tillering and heading stages.
