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亲缘关系进行了分。

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，在二倍体选育稻无融和生殖难度较大，而在多倍体筛选稻无融和生殖新已成为稻无融和生殖研究新生长点。