Fig. 4

A The gossypol content in the scion of different rootstocks of low- gossypol cotton; e1 is the scion of the ungrafted low-gossypol cotton, B The gossypol content in the rootstock of different scions of low-gossypol cotton, e2 is the rootstock of the ungrafted low-gossypol cotton. C The gossypol content in the scion of different rootstocks of high-gossypol cotton, f1 is the scion of the ungrafted high-gossypol cotton. D The gossypol content in the rootstock of different scions of high-gossypol cotton, f2 is the rootstock of the ungrafted high-gossypol cotton. Different letters indicate differences at P < 0.05, while uppercase letters indicate differences at P < 0.01