四川省高淀粉甘薯品种资源亲缘关系SRAP分析

Genetic relationship of high starch sweet potato germplasma of Sichuan by SRAP

甘薯是我国重要的粮食作物和能源作物。本实验用30对SRAP引物研究了39份用于甘薯高淀粉育种的品种资源之间的亲缘关系。各引物组合产生10-40个扩增带，30对引物共产生87个多态性带，平均每对引物组合产生2．9个多态性带。在遗传距离（GD）为0．585处，可将39个甘薯品种分为A、B、两类。A类21个占整个实验材料的59％，其中A类有高淀粉型材料12个（57％），B类18个占整个实验材料的41％。A类中的高淀粉材料明显B类，A、B两大类中的低淀粉材料大致相等，B类中的一般型材料明显，从聚类图来看四川省用于甘薯高淀粉育种的品种资源材料的遗传多样较丰富。

Sweet potato is an important crop for food and industrial processing in our country. The authors selected thirty SRAP（ Sequence-related Amplified Polymorphism）primers giving stable amplified bands to studied the relationship of 39 high starch germplasma of sweet potato Thirty SRAP primers detected 87 alleles among the germplasma tested. The average number of alleles per SRAP locus was 2.9 with a range from 10 to 40. When we used GD = 0. 585 as standard, we can compartmentalize 39 sweet potato germplasma to two groups （ A, B） , A contains 59% of the whole sweet potato germplasma we used in this study and B 41% . In the study,the authors found that the genetic diversity of high starch germplasma of sweet potato in Sichuan province is profuse.