The genus Rosa(Rosoideae, Rosaceae) revisited: molecular analysis of nrITS‐1 and atpB‐rbcL intergenic spacer (IGS) versus conventional taxonomy
- V. Wissemann, C. Ritz
- Biology
- 1 March 2005
The results suggest that Rosa in its traditional infrageneric circumscription is not reflected by molecular data, and the highest taxonomic rank below the generic level should be the sectional status.
Epicuticular wax morphology and the taxonomy ofRosa (sectionCaninae, subsectionRubiginosae)
- V. Wissemann
- BiologyPlant Systematics and Evolution
- 1 March 2000
Comparison with specimens grown under the same conditions confirmed these findings on natural populations and additionally revealed that following artificial hybridism, offspring develop the maternal type of wax structure due to the matroclinal inheritance in this section.
AFLP markers as a tool to reconstruct complex relationships: A case study in Rosa (Rosaceae).
- W. Koopman, V. Wissemann, M. Smulders
- BiologyAmerican-Eurasian journal of botany
- 1 March 2008
This work examined the applicability of AFLP markers for reconstructing (species) relationships in Rosa, using UPGMA clustering, Wagner parsimony, and Bayesian inference to yield reliable trees.
Evolution by reticulation: European dogroses originated by multiple hybridization across the genus rosa.
- C. Ritz, H. Schmuths, V. Wissemann
- BiologyJournal of Heredity
- 2005
Molecular evidence is presented by an analysis of nuclear ribosomal DNA data that dogroses are complex allopolyploids resulting from multiple hybridization events and that the pentaploid Caninae genome originated from different members of nondogroses and the now extinct Protocaninae.
Different evolutionary histories of two Phragmidium species infecting the same dog rose hosts.
- C. Ritz, W. Maier, F. Oberwinkler, V. Wissemann
- BiologyMycological Research
- 1 May 2005
Phylogenetic analyses of the D1/D2 region of the LSU rDNA suggest that P. mucronatum shares a common ancestor with other rose rusts, whereas P. tuberculatum is quite distinct, and must have undergone a host shift to Rosa spp.
Reproduction and Hybridisation in the Genus Rosa, Section Caninae (Ser.) Rehd.
- V. Wissemann, F. Hellwig
- Biology
- 1 June 1997
Apomictic reproduction was shown to be possible in all species of the section tested, but viable seed yields were only about 5% of those produced by xenogamy, which contradicts the hypothesis on the genomic constitution of the pentaploid Caninae with unbalanced heterogamy.
Formalizing morphologically cryptic biological entities: new insights from DNA taxonomy, hybridization, and biogeography in the leafy liverwort Porella platyphylla (Jungermanniopsida, Porellales).
- J. Heinrichs, H. Kreier, V. Wissemann
- BiologyAmerican-Eurasian journal of botany
- 1 August 2011
The present investigation was carried out to elucidate the molecular diversity of P. platyphylla s.l. and the distribution of its main clades, and to evaluate evidence for the presence of one vs. several species.
Male correlated non-matroclinal character inheritance in reciprocal hybrids of Rosa section Caninae (DC.) Ser. (Rosaceae)
- C. Ritz, V. Wissemann
- BiologyPlant Systematics and Evolution
- 4 November 2003
The morphological analysis gives clear evidence that conventional taxonomical concept is artificial and does not reflect the evolutionary patterns among dog-roses.
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