Analysis Of Genetic Diversity And Relationship Between Tomato Genotypes Based On SSR Markers

Nine SSR (simple sequence repeat) primers were used to detect the genetic diversity among 24 tomato genotypes, and total 64 allels were obtained. The average allels per SSR locus were 7. 1 with a range from 3 to 12. The mean genetic distance of the 24 tomato accessions was 0. 198, varying from 0. 0312 to 0. 4371. Cluster analysis showed that the 24 tomato accessions could be classified into three classes at the genetic distance of 0.086. At the genetic distance of 0.0056, each of the four groups for the accessions based on SSR markers basically matched the performances of the agronomic characters. When the genetic distance was over 0.0056, however, the cluster result did not match the performances of the agronomic characters.The cluster result based on 8 morphological characters controlled by one dominat gene and two agronomic characters controlled by multi-genes showed in consistent with that based on SSR markers when the agronomic characters were relatively close.