Banca de QUALIFICAÇÃO: JULIENE DE FATIMA MACIEL DA SILVA

Uma banca de QUALIFICAÇÃO de DOUTORADO foi cadastrada pelo programa.
STUDENT : JULIENE DE FATIMA MACIEL DA SILVA
DATE: 28/06/2024
TIME: 09:30
LOCAL: On-line
TITLE:

"Systematics and evolution of Bulbostylis Kunth (Cyperaceae) in the Neotropics"

KEY WORDS:

Angiosperms353, biodiversity, biogeography, phylogenomics, taxonomy

PAGES: 33
BIG AREA: Ciências Biológicas
AREA: Botânica
SUMMARY:

Bulbostylis (hairsedges) is a speciose lineage of sedges with about 230 accepted extant species worldwide. Recent molecular phylogenetic work has provided support for the Bulbostylis clade, but the morphological delimitations of infrageneric taxa remain problematic in areas of high species-richness. Bulbostylis is an example where limited availability of molecular data impedes clarification of evolutionary relationships, and hamper the study of character evolution and biogeographical history of the genus. The Neotropics is one of the centres of diversity for Bulbostylis with about 80 currently accepted species, however, the taxonomy continues to be poorly understood, numerous specimens not identified at the species level and probably with still undescribed species. The main objective of this project is to carrying out a systematic and evolutionary study of the neotropical Bulbostylis through a taxonomic revision and phylogenomic and biogeographic analyses. It is predicted to prepare a taxonomic revision of the neotropical species of Bulbostylis; to obtain an enlightening phylogeny based on phylogenomic data and extensive sampling of species complexes; to investigate possible speciation events, which may have contributed to the current distribution patterns of Bulbostylis species. Preliminary results include: analysing almost 4000 specimens of neotropical Bulbostylis deposited at the herbaria, fieldtrips undertaken in Brazil for the collecting specimens for herbaria and DNA samples in Amazon and Cerrado domain, DNA extraction from 44% of samples, discovery of new species to science, new occurrence registrations, and new research funds. This notoriously taxonomically complex Cyperaceae genus is in urgent need of revision using an integrative taxonomic approach combining molecular and morphological data.

COMMITTEE MEMBERS:
Presidente - ***.309.237-** - ANDRÉ DOS SANTOS BRAGANÇA GIL - MPEG
Interna - ***.377.842-** - ANNA LUIZA ILKIU BORGES BENKENDORFF - MPEG
Externo à Instituição - CLIMBIÊ FERREIRA HALL - UFMS
Externa à Instituição - LUCIANA PEREIRA DA SILVA - UFSC