Genetic diversity in peanut cultivars based on SSR markers.

In this study , 48 SSR markers were used to assess the genetic variation of 63 peanut cultivars. The results showed that total 251 polymorphic alleles were detected , and the number of polymorphic fragments per marker ranged from 2 to 13 with an average of 5. 23. The genetic diversity index ranged from 0. 508 to 2. 243 with an average of 1.272. Polymorphism information content (PIC) ranged from 0. 252 to 0. 873 with an average of 0. 647 per primer pairs. Genetic similarity coefficients (GS) ranged from 0.657 to 0 . 9 6 0 , GS were lower among different botanical types , and genetic relationship was more distant among different origins. Cluster analysis was performed with the GS and the UPGMA method. 63 cultivars were divided into 4 groups at the threshold of 0. 74. The result of clustering analysis supported the conventional classification. [ABSTRACT FROM AUTHOR]