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质的亲缘关系进行了分。

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，在二倍体水平水稻无融和生殖质的难度较大，而在多倍体水平筛水稻无融和生殖新质已成为水稻无融和生殖研究新的生长点。