It is deduced that the polyploidization took place at early time of formation of Acipenseriformes and within the genus Acipenser.

• 说明在细胞水平的染色体加倍与鲟形目鱼类各科、属分化没有直接联系，只在鲟形目形成的早期和鲟形目形成后的鲟属种间分化中扮演着重要角色。