Genetic relationship of genus Rosa germplasm and genetic diversity of Rosa rugosa in Korea.

Fifty-nine accessions of 23 species in genus Rosa were collected, and 15 accessions of Rosa rugosa were collected throughout 10 regions of Korea. Their genetic relationship was investigated by using morphological analysis and RAPD marker. The morphological analysis was measured for 7 quantitative and quantified for 4 qualitative traits. RAPD analysis obtained a total of 959 polymorphic bands by using twenty primers. Morphological analysis classified most according to the rose section system except for several species. The cluster analysis of genus Rosa based on RAPD data could identify the subgenus Platyrhodon and Eurosa. The subgenus Eurosa separated five sections; Gallicanae, Cinnamomeae, Pimpinellifolia, Synstylae, and Caninae. Correlation analysis between morphological and RAPD analysis showed low significance (r = 0.35). The accessions of R. rugosa belonged to the section Cinnamomeae clustered into three groups at genetic distance ranging from 0.28 on the base of RAPD analysis. In conclusion, the genetic relationship of the genus Rosa was consistent to the previously reported rose section system, and domestic collections of R. rugosa were separated from 3 groups on the base of RAPD marker.