Seven kinds of CMS have been identified in sorghum, including A1, A2, A3, A4, A5, A6, and 9E, but only A1(milo) CMS has been widely used in commercial sorghum hybrid production.

• 杂交种F1 代的甲基化水平低于双亲,是由于F1 代相对于其亲本甲基化模式经过重新调整,在F1 代基因组中甲基化水平的总体变化。