| Abstract Detail
Systematics Goncalves, Deise [1], Simpson, Beryl [1], Ortiz, Edgardo M. [1], Jansen, Robert [1]. Comparative analyses of whole plastid genomes from the Myrtales. According to the most recent classification of angiosperms, Myrtales is nested in the malvid clade and is sister to Geraniales, a group well known for their highly rearranged and rapidly evolving plastid genomes. Among the nine myrtalean families, Myrtaceae and Melastomataceae are the largest, comprising ca. 9,000 species that are pantropically distributed. Phylogenetic relationships among and within myrtalean families have been investigated in the last decade, however, plastid genome information is only available for a few genera of Myrtaceae and Onagraceae. To further investigate plastid genome variation in Myrtales, at least one taxon per family was sampled, sequenced, assembled and annotated. In addition, at least one taxon of all the eight genera of Vochysiaceae were included in the comparative analysis with genomes previously published (e.g., Eucalyptus spathulata, Oenothera glazioviana, Nicotiana tabacum). Plastid genome evolution is being investigated through comparative analysis of structural organization in order to detect gene rearrangements, losses, duplications and transfers. We will also present general features of the genomes, including size, GC content, percentage of coding sequences and gene content, number of protein-coding genes, and tRNA and rRNA genes. The analysis of the whole plastid genomes will allow detection of highly variable non coding regions that may be useful for phylogenetic studies of the families within the order. Furthermore, this study provides genomic scale data to test previous phylogenies of myrtalean families based on few molecular markers. This research is in progress and a phylogenetic reconstruction built using sequences that are already available supports relationships previously suggested among the families. Further analysis will be done with more taxa representing all the families. Comparative analysis of whole plastid genomes annotated to date exhibit gene order and genome organization similar to E. spathulata. Plastid genome sequences of the following species will be presented: Callisthene major, Erisma bracteosum, Heimia myrtifolia, Laguncularia racemosa, Qualea grandiflora, Ruizterania albiflora, Saltera sarcocolla, Salvertia convallariodora, Tibouchina urvilleana, and Vochysia acuminata.
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1 - The University of Texas at Austin, Department of Integrative Biology, Plant Biology Graduate Program, 1 University Station, C0930, Austin, TX, 78712, USA
Keywords:
Melastomataceae
Lythraceae
Combretaceae
Penaeaceae
Vochysiaceae
Phylogenetically informative sites
Plastid DNA.
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 5:30 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: PSY033
Abstract ID:506
Candidate for Awards:None |
