Phylogenesis of 48 tobacco germplasms from different countries or regions was analyzed with amplified fragment length polymorphism (AFLP).

摘要利用AFLP技术，对48份不同类型和地域来源烟草种质亲缘关系分析。

The r-line idioplasm mainly is the kaoliang and trend kaoliang type.

恢复系种质主要是粱和倾粱类型。

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。