Anna Petri
Current Organizations / Institutes
The organizations/institutes from the scholar's latest article
Research Subjects
Research Interests
Anna Petri has a total of 6 co-authors. Here are the top co-authors by number of shared publications:
- Andreas Spillner
Department of Mathematics and Computer Science, University of Greifswald, Germany
1 shared publication Bengt Oxelman
Department of Plant and Environmental Sciences (DPES) University of Gothenburg Box 461 40530 Göteborg Sweden
1 shared publication- Bengt Oxelman
Department of Plant and Environmental Sciences, University of Gothenburg, Sweden
1 shared publication - Katharina T. Huber
School of Computing Sciences, University of East Anglia, Norwich, UK
1 shared publication - Martin Lott
School of Computing Sciences, University of East Anglia, Norwich, UK
1 shared publication - Vincent Moulton
School of Computing Sciences, University of East Anglia, Norwich, UK
1 shared publication
Latest Publications
Phylogenetic relationships within Silene (Caryophyllaceae) section Physolychnis
Phylogenetic relationships within Silene sect. Physolychnis are investigated using DNA sequences from two low‐copy nuclear regions and three plastid regions. We expand the circumscription of Physolychnis to include also Siberian and Eurasian taxa, with S . zawadzkii and S . uralensis as delimiters of the section. Two main clades are identified within Physolychnis , the Siberian S . ajanensis group and an Asian/American clade. Several taxa, previously classified to sect. Odontopetalae , sect. Occidentales , and sect. Morrisonmontanae , are shown to belong to the Asian/American clade, which otherwise corresponds to Bocquet's (1969) circumscription of sect. Physolychnis . Silene sect. Physolychnis also includes several additional, mainly Asian taxa (e.g., S . davidii , S . seoulensis , S . keiskei , S . viscosa , S . quadriloba , and homoeologues from S . songarica , S . firma , and S . tolmatchevii ). Several putative allopolyploids are identified, in several cases stemming from crosses between the two main clades. The two allotetraploids S . involucrata and S . sachalinensis , although morphologically and geographically distinct, have indistinguishable ancestries.
Phylogenetic relationships within Silene (Caryophyllaceae) section Physolychnis
Phylogenetic relationships within Silene sect. Physolychnis are investigated using DNA sequences from two low‐copy nuclear regions and three plastid regions. We expand the circumscription of Physolychnis to include also Siberian and Eurasian taxa, with S . zawadzkii and S . uralensis as delimiters of the section. Two main clades are identified within Physolychnis , the Siberian S . ajanensis group and an Asian/American clade. Several taxa, previously classified to sect. Odontopetalae , sect. Occidentales , and sect. Morrisonmontanae , are shown to belong to the Asian/American clade, which otherwise corresponds to Bocquet's (1969) circumscription of sect. Physolychnis . Silene sect. Physolychnis also includes several additional, mainly Asian taxa (e.g., S . davidii , S . seoulensis , S . keiskei , S . viscosa , S . quadriloba , and homoeologues from S . songarica , S . firma , and S . tolmatchevii ). Several putative allopolyploids are identified, in several cases stemming from crosses between the two main clades. The two allotetraploids S . involucrata and S . sachalinensis , although morphologically and geographically distinct, have indistinguishable ancestries.
- Open Access
- 28 August 2009
- Published by Springer Nature in BMC Ecology and Evolution
- Vol. 9 (1) , 216
Inferring polyploid phylogenies from multiply-labeled gene trees
Background: Gene trees that arise in the context of reconstructing the evolutionary history of polyploid species are often multiply-labeled, that is, the same leaf label can occur several times in a single tree. This property considerably complicates the task of forming a consensus of a collection of such trees compared to usual phylogenetic trees.Results: We present a method for computing a consensus tree of multiply-labeled trees. As with the well-known greedy consensus tree approach for phylogenetic trees, our method first breaks the given collection of gene trees into a set of clusters. It then aims to insert these clusters one at a time into a tree, starting with the clusters that are supported by most of the gene trees. As the problem to decide whether a cluster can be inserted into a multiply-labeled tree is computationally hard, we have developed a heuristic method for solving this problem.Conclusion: We illustrate the applicability of our method using two collections of trees for plants of the genusSilene, that involve several allopolyploids at different levels.
- 28 August 2009
- Published by Springer Nature in BMC Ecology and Evolution
- Vol. 9 (1) , 216
Open AccessInferring polyploid phylogenies from multiply-labeled gene trees
Background: Gene trees that arise in the context of reconstructing the evolutionary history of polyploid species are often multiply-labeled, that is, the same leaf label can occur several times in a single tree. This property considerably complicates the task of forming a consensus of a collection of such trees compared to usual phylogenetic trees.Results: We present a method for computing a consensus tree of multiply-labeled trees. As with the well-known greedy consensus tree approach for phylogenetic trees, our method first breaks the given collection of gene trees into a set of clusters. It then aims to insert these clusters one at a time into a tree, starting with the clusters that are supported by most of the gene trees. As the problem to decide whether a cluster can be inserted into a multiply-labeled tree is computationally hard, we have developed a heuristic method for solving this problem.Conclusion: We illustrate the applicability of our method using two collections of trees for plants of the genusSilene, that involve several allopolyploids at different levels.