polyploid

In contrast to homoploid hybrid species,polyploid species are easily diagnosed because of chromosome number changes associated with genome doubling.

与同倍杂体种相比，为与组加倍相关染色体数目变化,多倍杂体种很容易判断。

Abstract : It is difficulty to select and breed apomictic germplasm among diploid rices at present, but it has become a hotspot to select and breed apomictic germplasm among polyploid rices.

摘要 ： 目前，在二倍体水平上选育水稻无融和生殖种质难度较大，而在多倍体水平筛选水稻无融和生殖新种质已成为水稻无融和生殖研究新生长点。