这些类型都是高度不育的，正如由基本的二倍体衍生三倍体和同源四倍体一样。
These forms are highly sterile, as would be expected of triploids and of autotetraploids derived from basic deploids.
同源四倍体水稻是二倍体水稻染色体加倍形成的。
Autotetroploid rice has double genome compared with diploid rice.
与二倍体对照相比，同源四倍体材料的花粉育性、结实率均不同程度下降，尤其低代材料的花粉育性59。
Compared with diploid control, the pollen fertility and seed set of autotetraploid declined dramatically, especially in preliminary generations, and they were only 59.
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