关键词: 分子标记, 甘薯, 遗传多样性, 应用

Abstract: Genetic diversity is the basis for genetic improvement of sweet potato varieties. Due to the advantages of molecular markers, such as the great numbers, no restriction of environment and gene expression, mostly co-dominance,  and no effection on biological traits,  molecular markers technologies have been widely used in studies of genetic diversity in sweet potato. This paper compared several PCR\|based molecular markers such as RAPD,  AFLP,  SSR,  ISSR and SRAP. And their applications in the study of sweet potato genetic diversity were reviewed from two aspects,  genetic differences and relationship cluster analysis,  respectively. The comparative analysis indicated that ISSR was a kind of co-dominant and low cost molecular marker with good reproducibility,  high polymorphism, and very promising prospect, which has been widely used in researches of sweet potato including genetic diversity,  species relationship, taxonomy and assisted breeding.

Key words: molecular markers, sweet potato, genetic diversity, application