The seed setting rate has no obvious difference between autotriploid and autotetraploid, but it will rise with the increase of the self-bred generations.
③同源三倍体和同源四倍体之间的自交结实率没有明显的区别，结实率会随着自交代数的增加而上升。
2
The superior maize self-bred lines of Danyu series such as Zi330, E28 and Dan340, etc, are the most important key materials for the maize breeding and production in China.