Gesellschaft für Biologische Systematik (GfBS): The evolution and diversity of asexual organisms.
Convener: Elvira Hörandl (email@example.com).
The evolution of asexual eukaryotes provides challenging questions for evolutionary biology. Various reproductive strategies exist in animals and plants, and asexuality is often connected to a considerable short-term evolutionary success. Short term success is manifested e.g. in geographical parthenogenesis, ie., in the phenomenon that asexual organisms often have larger distribution areas than their sexual relatives. In plants, agamic polyploid complexes harbor a considerable diversity of lineages, often outnumbering sexual congeners. The advantages of mixed systems, and the long-term fate of asexual lineages, however, are still under dispute. The investigation of various case studies in plants and animals and the development of theory will greatly improve our understanding of a core question of evolutionary biology, that is, the predominance of sex in higher eukaryotes.
All slots for this symposium have been filled and abstract submission for oral presentations for this symposium is now closed.
Wednesday, August 16th. Morning session.
08.30 – 09.00
- A. Dickinson1,2, A. Liston3, N. Talent1:
Sex and the single apomict; a view through rose-tinted glasses.
1Royal Ontario Museum, Natural History, Toronto, Canada; 2University of Toronto, Ecology & Evolutionary Biology, Toronto, Canada; 3Oregon State University, Department of Botany & Plant Pathology, USA.
09.00 – 09.20
Christoph Dobeš1, Karl Hülber2, Henar Alonso-Marcos:
The role of reproductive interactions for co-occurrence of sexual and apomictic conspecific cytotypes – a case study on Potentilla puberula Krašan (Rosaceae).
1Austrian Research Centre for Forests, Department of Forest Genetics, Vienna; 2Department of Conservation Biology, Vegetation and Landscape Ecology, University of Vienna, Austria
09.20 - 09.40
Sílvia Castro1,2, João Loureiro1, Sofia Conceição3, Ana S. Róis3,4, Ana D. Caperta3:
Genome size differences, cytological features and chromatin organization in diploid and polyploid Limonium complexes.
1Centre for Functional Ecology, Department of Life Sciences, University of Coimbra, Coimbra, Portugal; 2Botanic Garden, University of Coimbra, Coimbra, Portugal; 3Linking Landscape, Environment, Agriculture and Food (LEAF), Instituto Superior de Agronomia (ISA), Universidade de Lisboa, Lisboa, Portugal; 4School of Psychology and Life Sciences, Universidade Lusófona de Humanidades e Tecnologias (ULHT), Lisboa, Portugal.
09.40 – 10.00
Wolbachia is highly prevalent in Calligrapha (Coleoptera: Chrysomelidae) but is not responsible for the evolution and maintenance of unisexuality in this genus
1Institute of Evolutionary Biology (CSIC-Universitat Pompeu Fabra), 08003 Barcelona, Spain.
10.00 – 10.30
10.30 – 10.50
The classification of asexual organisms in the -omics era
1Department of Systematics, Biodiversity and Evolution of Plants (with Herbarium), University of Goettingen, Göttingen, Germany.
10.50 – 11.10
Ladislav Hodač1, Birthe H. Barke1, Elvira Hörandl1:
Genetic and morphological segregation of F2 hybrids elucidate the origin of plant species in the Ranunculus auricomus complex
1Department of Systematics, Biodiversity and Evolution of Plants (with Herbarium), Georg-August-University of Göttingen, Göttingen, Germany.
11.10 – 11.30
No sex below the ground – oribatid mites as model organism to investigate long-term consequences of asexual reproduction.
1University of Göttingen, JF Blumenbach Institue of Zoology and Anthropology, Untere Karspüle 2, 37073 Göttingen, Germany.
11.30 – 11.50
Piyal Karunarathne1, Mara Schedler2, Eric J. Martínez2 Anna I. Honfi3, and Diego Hojsgaard1:
Cytotype displacement and niche differentiation between cytotypes shape distribution patterns in the South American grass Paspalum intermedium.
1Department of Systematics, Biodiversity and Evolution of Plants, Albrecht-von-Haller Institute for Plant Sciences, University of Goettingen, Goettingen, Germany; 2Instituto de Botánica del Nordeste (IBONE), Facultad de Ciencias Agrarias, Universidad Nacional del Nordeste (FCA-UNNE), Corrientes, Argentina. 3Programa de Estudios Florísticos y Genética Vegetal, Facultad de Ciencias Exactas, Químicas y Naturales, Universidad Nacional de Misiones, Instituto de Biología Subtropical, Posadas, Misiones, Argentina.
11.50 – 12.00
Nardi F. D.1,2, Alonso-Marcos H.1,3, Müller D.2, Grasegger T.2, Dobeš C.1, Tribsch A.2:
Origin of apomictic cytotypes of Potentilla puberula and their genetic relationship with sexuals.
1Department of Genetics, Federal Research and Training Centre for Forests, Natural Hazards, and Landscape, Vienna, Austria; 2Department of Ecology and Evolution, University of Salzburg, Salzburg, Austria; 3Department of Botany and Biodiversity Research, University of Vienna, Vienna, Austria.
Conceição, S.1, Caperta, A. D.1:
Limonium spp. as a model to study the emergence of apomixis
1Linking Landscape, Environment, Agriculture and Food (LEAF), Instituto Superior de Agronomia (ISA), Universidade de Lisboa, Lisboa, Portugal.
Henar Alonso-Marcos1,2, Flavia Domizia Nardi1,3, Tuuli Myllynen1, Patricia Pérez Rodríguez2, Karl Hülber2, Christoph Dobeš1:
Pollen competition between sexual and apomictic individuals in Potentilla puberula(Rosaceae).
1Federal Research and Training Centre for Forests, Natural Hazards and Landscape, Wien, Austria; 2Department of Conservation Biology, Vegetation Ecology and Landscape Ecology, University of Vienna, Vienna, Austria;3Department of Ecology and Evolution, University of Salzburg, Salzburg, Austria.