1Qingdao Agricultural University，College of Horticulture，Qingdao 266000，Shandon，China；2State Key Laboratory of Vegetable Biobreeding，Institute of Vegetables and Flowers，Chinese Academy of Agricultural Sciences，Beijing 100081，China
Abstract：During the breeding process of Lycopersicon esculentum var. cerasiforme A. Gray，materials with rich genetic diversity are advantageous for further cultivation of varieties with important target traits．This paper performed genetic diversity and DNA fingerprinting on 12 commercial cherry tomato varieties collected from market，and 110 accessions of cherry tomato inbred lines bred for several years using 48 pairs of core InDel marker screened out from fresh-eating and processing tomato germplasm resources．The results indicated that the 122 accessions germplasm resources exhibited significant genetic diversity in field phenotype．And 48 pairs of core InDel marker also displayed good polymorphism among these cherry tomato germplasm resources．The genetic distances among the 122 germplasm resources were ranged from 0-0.886 cM．The average genetic distance was 0.473 cM．Clustering analysis had divided all germplasm resources into 3 main microbial strains，among them the selected 110 inbred lines distributed in different groups，mostly in the groups of ‘Fenbeibei’ and ‘Fenbeini’．Comprehensive evaluation carried out on 420 F1 combinations prepared by using inbred lines had discovered that among the 10 chosen combinations，6 with better yields．Their genetic distances were close to or greater than the average value，showing significant advantages．Furthermore，using parents of the 10 combinations constructed by 48 pairs core InDel markers and clear fingerprint of the 12 commercial varieties could completely distinguish the above materials．
