The ABC Model and the Quartet Model of Floral Organ Identity
花器官决定的ABC 模型和四因子模型

The ABC model was established in late 1980s to explain the genetic interactions between floral homeotic mutations. As the progress in flower developmental genetics, the ABC model was expanded to the ABCD model with the introduction of D class genes for ovary identity. More recently, a A-E model was proposed and will be discussed in this short review.