Abstract
Earlier analyses of chloroplast and mitochondrial DNA restriction site variations within 17 rose species gave two to three groups based on the cytoplasmic relatedness. The species were from seven sections within the subgenus Rosa. This study investigated the molecular systematics based on the cytoplasmic relatedness of the genus Rosa. Included in our study were the subgenera Hulthemia, Platyrhodon, and Hesperhodos, and the sections Indicae, Laevigatae and Bracteatae in the subgenus Rosa, all of which had not been examined previously. We used matK sequence variation for detailed analysis of phylogenetic relationships. Our molecular classification conformed closely to the traditional classification of botanical sections. Six out of the seven original species that contributed to modern roses were found to belong to only one clade. This confirms the narrow genetic background of modern roses.
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