Abstract Detail

Phylogenomics

Gates, Daniel [1], Smith, Stacey [2].

Anthocyanin regulating MYB transcription factor evolution in four Solanaceous species.

The MYB domain containing class of genes represent a large and important transcription factor gene family plants. They have often been demonstrated as having vital transcriptional roles in many cell processes. Of their diverse cellular roles, regulation of gene pathways involved in floral epidermal structuring and coloration are frequent targets of these transcription factors. MYBs have also proliferated greatly in multicellular plants, so much so that angiosperm species frequently contain hundreds of genes within the family. While MYBs likely play a vital role in plant evolution and speciation via their involvement in floral coloration shifts, little is known about the evolution of MYB genes involved in floral coloration because of of the computational burdens of accurately aligning, reconstructing the phylogenetic history, and identifying important loss and duplication events. In this study we attempt to use whole genome information from four plant species within the family Solanaceae to assess the level of homology of MYB transcription factors which have a known function as regulators of the anthocyanin pigment pathways as well as document novel gains and losses within pigmentation MYB clades. In this study we demonstrate that, with some exception, pigmentation reltated mybs from Solanum lycopersicum, Solanum tuberosum, Nicotiana bentamiana, and Iochroma cyaneum form a single clade and that novel gene duplications and losses have occurred between the closely related S. lycopersicum and S. tuberosum the result of which is at least three chromosomally colocalized paralogous copies of S. lycopersicum pigmentation MYBs and a loss of the putative orthologous copy in S. tuberosum.

Broader Impacts:

1 - 619 S 20th St Apt 9, Lincoln, NE, 68510, USA
2 - University of Nebraska, School of Biological Sciences, 1104 T St., Lincoln, NE, 68588-0118, USA

Keywords:
Floral Color
genome evolution
gene duplication
functional divergence of gene duplicates
Phylogenomics.

Presentation Type: Poster:Posters for Topics
Session: P
Location: Grand Salon A - D/Riverside Hilton
Date: Monday, July 29th, 2013
Time: 5:30 PM
Number: PPL002
Abstract ID:464
Candidate for Awards:Genetics Section Poster Award