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，在二平上选育稻无融和生殖种质难度较大，而在多平筛选稻无融和生殖新种质已成为稻无融和生殖研究新生长点。