Among the three hybrid species, the AACC and BBCC genomes are the closest Genetically, the AABB genome has a longer distance from the BB genome man from the AA genome.

• 复合种同基本种之间的关系是：AABB和AA基因组的关系，要比它同BB的关系近，BBCC同CC基因组的关系，要比它同BB基因组近。