CAJ | 학술논문

遗传多样性是甘薯品种遗传改良的基础。由于分子标记具有数量极大、不受环境及基因表达与否的限制、多为共显性、不影响生物性状表现等优点，现已在甘薯遗传多样性研究中得到广泛应用。本文比较了 RAPD、AFLP、SSR、ISSR和SRAP等几种基于PCR的分子标记方法，分别从遗传差异和亲缘聚类分析两方面，对它们在甘薯遗传多样性研究中的应用进行了综述。对比分析表明ISSR是一种共显性、成本较低、重复性好、多态性较高且非常有发展前途的分子标记，并已经被广泛应用到甘薯遗传多样性、物种亲缘关系、系统分类和辅助育种研究中。
유전다양성시감서품충유전개량적기출。유우분자표기구유수량겁대、불수배경급기인표체여부적한제、다위공현성、불영향생물성상표현등우점，현이재감서유전다양성연구중득도엄범응용。본문비교료 RAPD、AFLP、SSR、ISSR화SRAP등궤충기우PCR적분자표기방법，분별종유전차이화친연취류분석량방면，대타문재감서유전다양성연구중적응용진행료종술。대비분석표명ISSR시일충공현성、성본교저、중복성호、다태성교고차비상유발전전도적분자표기，병이경피엄범응용도감서유전다양성、물충친연관계、계통분류화보조육충연구중。
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.