Abstract Detail

Systematics

LI, JIANHUA [1], Del Tredici, Peter [2], Lemmon, Alan R. [3], Moriarty Lemmon, Emily [3].

Phylogenetic Relationships of Theaceae Revisited: Evidence from Sequences of Multiple Nuclear Loci.

Theaceae consist of 9 genera and over 450 species with a geographic distribution in both the New and Old Worlds. The theaceous plants are important in ecology, economy, and culture; tea culture has been well developed in Asia in ancient times and in other parts of the world in recent centuries. Both morphological and molecular data support the division of the theaceous genera into three groups (tribes): Theeae, Stewartieae, and Gordineae. In the latter two tribes, however, several systematics questions remain unanswered: 1) What are the relationships among the genera, Franklinia, Gordonia, Hartia, Schima, and Stewartia? 2) Are the species of Hartia a derived lineage within Stewartia? 3) Do the North American species of Stewartia form a monophyletic group, as do the Asian species? 4) How many times have the rounded bracts evolved in Stewartia? 5) Are there distinct lineages (or species) in the Stewartia sinensis complex? Our previous phylogenetic analyses of multiple plastid DNA regions provided some insights for the questions as outlined above. However, the phylogenetic hypotheses inferred from the plastid sequence data need further testing from other lines of evidence. Hence in this study we employed the anchored phylogenomic technique to gather DNA sequence data from over 400 nuclear loci. This effort represents the first test of the phylogenetic relationships of Theaceae using multiple nuclear loci.

1 - Hope College, ARNOLD ARBORETUM, 35 E 12th Street, Holland, MI, 49423, USA
2 - Arnold Arboretum, 1300 Centre Street, Weld Hill Research Building, Boston, MASSACHUSETTS, 02131, United States
3 - Florida State University, 89 Chieftain Way, Biology Unit 1, Tallahassee, FL, 32306-4295, United States

Keywords:
Theaceae
low-copy nuclear markers
anchored phylogenomics
Stewartia
Hartia
Stewartia species complex.

Presentation Type: Poster
Session: P, Systematics Section/ASPT Posters
Location: Exhibit Hall/Savannah International Trade and Convention Center
Date: Monday, August 1st, 2016
Time: 5:30 PM This poster will be presented at 6:15 pm. The Poster Session runs from 5:30 pm to 7:00 pm. Posters with odd poster numbers are presented at 5:30 pm, and posters with even poster numbers are presented at 6:15 pm.
Number: PSY038
Abstract ID:433
Candidate for Awards:None