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的烟草种质的亲缘行了分。

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，倍体水平上选育水稻无融和生殖种质的难度较大，而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的生长点。