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Abstract Detail

Genomics / Proteomics

Gerelle, Wesley [1], Lam, Vivienne K. Y. [1], Graham, Sean W. [1].

Comparative genomics of Parasitaxus usta, a podocarp conifer with a unique form of heterotrophy.

Parasitaxus usta (Podocarpaceae) is a parasitic and possibly mycoheterotrophic conifer endemic to New Caledonia. Its plastid genome is highly reduced with only the ribosomal-protein genes, RNA polymerase genes, infA, ycf1, ycf2, matK, clpP and accD retained under putative purifying selection. Despite the loss of most plastid-encoded photosynthetic genes, it retains both nuclear and plastid-encoded genes of the CF1 complex of ATP synthase (the so-called 'lollipop head' of the enzyme). We examine how this complex is evolving based on analysis of dN/dS ratios and document the utility of each gene in phylogenetic inference. We also explore a transcriptome for this species produced by the 1KP (One Thousand Plants) project to document genome-wide patterns of gene retention, including nuclear-encoded photosynthetic genes and other plastid-targeted genes, with the goal of characterizing patterns of Gene Ontology (GO) term enrichment relative to its photosynthetic relatives in Podocarpaceae.

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1 - University of British Columbia, Botany, 3529 - 6270 University Boulevard, Vancouver, BC, V6T 1Z4, Canada

gene ontology
Gene loss.

Presentation Type: Oral Paper
Session: 27, Genomics & Proteomics II
Location: 105/Savannah International Trade and Convention Center
Date: Tuesday, August 2nd, 2016
Time: 2:45 PM
Number: 27006
Abstract ID:488
Candidate for Awards:Margaret Menzel Award

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