Genetic Diversity and Population Structure of Japanese Plum-Type (Hybrids of P. salicina) Accessions Assessed by SSR Markers

Japanese plum (Prunus salicina Lindl.) is widely distributed in temperate zones across the world. Since its introduction to USA late 19th century, this species has been hybridized with up 15 different diploid Prunus species. This high level of introgression resulted a wide range traits and agronomic behaviors among currently grown cultivars. In work, 161 plum-type accessions were genotyped using set eight Simple Sequence Repeats (SSR) markers assess current genetic diversity population structure. A total 104 alleles detected, an average 13 per locus. The overall Polymorphic Informative Content (PIC) value SSR was 0.75, which indicates that these are highly polymorphic. Unweighted Pair Group Method Arithmetic (UPGMA) dendrogram seven groups inferred by Discriminant Analysis Principal Components (DAPC) revealed strong correlation structure parentage background accessions, supported moderate but significant differentiation. results reported herein provide useful information for breeders preservation germplasm resources.