Читать книгу Principles of Plant Genetics and Breeding - George Acquaah - Страница 351

Apomixis arises by a number of mechanisms, of which four major ones that differ according to origin (cell that undergoes mitosis to produce the embryo) are discussed next. Seed formation without sexual union is called agamospermy, the mechanism that may be summarized into two categories – gametophytic apomixis and adventitious apomixis. There are two types of gametophytic apomixis – apospory and diplospory.