polyploid

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

与同倍杂合体物种相，与基加倍相关的体数目的变化,多倍杂合体物种很容易判断。

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的难度较大，而在多倍体水平筛选水稻无融和生殖新种质已成水稻无融和生殖研究新的生长点。