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Sascha Heller

 

Sascha Heller

Ph.D. student

A2.16: DRIVERS OF EVOLUTION IN BROMELIOIDEAE IN THE MATA ATLANTICA AND CERRADOS/CAMPOS RUPESTRES

Evolution and phylogeny of Bromeliaceae (Poales), especially of the subfamily Bromelioideae.
The subfamily Bromelioideae (Bromeliaceae) comprises - besides the famous Pineapple (Ananas comosus) - more than 900 species in 33 genera. In the last years several molecular analyses of Bromeliaceae and especially Bromelioideae have been published. These analyses indicate that many bromeliad genera originally based on morphological characters are para- or polyphyletic. Especially the largest genus of Bromelioideae, Aechmea, is polyphyletic. The delimitation of Aechmea and allied genera is by no means clear and also the infrageneric classification of Aechmea receives hardly any support from molecular data. However, molecular studies at hand up to now suffer from still insufficient sampling and low support for the revealed topologies.
In our attempts to identify monophyletic groups we recently confirmed the monophyly of the so called Portea-Gravisia-clade, comprising taxa of the genera Aechmea, Portea and Canistrum using AFLPs.
Our new approach focuses on a broad sampling from the core-Bromelioideae. We selected more than 400 accessions to generate a large phylogeny based on plastid as well as nuclear sequences. Combination with biogeographical and morphological data will help to elucidate the evolutionary history and role of traits within the Bromelioideae and to identify monophyletic groups with suggestions for genus boundaries.

Poster

Heller, S., Leme, E., Kanz, B., Benko-Iseppon, A., Silvestro, D., Schulte, K., Zizka, G. (2011). The Portea/Gravisia-complex (Bromelioideae, Bromeliaceae) – new insights from molecular studies. Poster, XVIII. International Botanical Congress (23.-30.07.2011), Melbourne, Australia. P. 663 in Abstract Book (752 pp.).

Heller, S., Leme, E., Zizka, G. (2012). Phylogenetic relationships wihtin Bromelioideae (Bromeliaceae / Poales). Poster, 21st International Symposium „Biodiversity and Evolutionary Biology“ of the German Botanical Society (DBG) (16.-19.09.2012), Mainz, Germany. P27 in Abstract Book (111 pp.)

Steinbeisser, G., Paule, J., Heller, S., Leme, E., Zizka, G. (2012). Systematics and phylogeny of Ananas and its relatives (Bromeliaceae). Poster, 21st International Symposium „Biodiversity and Evolutionary Biology“ of the German Botanical Society (DBG) (16.-19.09.2012), Mainz, Germany. P69 in Abstract Book (153 pp.)

Presentation

Silvestro, D., Schulte, K., Heller, S., Leme, E.M.C., Benko-Iseppon, A.M., Zizka, G. (2011). Evolution of Neotropical epiphytes: a lesson from Bromelioideae (Bromeliaceae). Talk, XVIII. International Botanical Congress (23.-30.07.2011), Melbourne, Australia. P. 212 in Abstract Book (752 pp.).

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