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Abstract Detail



Recent Topics Posters

LI, ZHENG [1], Barker , Michael [1].

Inferring Paleopolyploidy from Five Fern and Lycophyte Transcriptomes.

Polyploidy or whole genome duplication is one of the most important forces in vascular plant evolution. Recent genomic analysis suggests multiple rounds of ancient whole genome duplication or paleopolyploidy in flowering plants. Previous studies also suggested paleopolyploidy may be responsible for the high chromosome numbers of homosporous ferns. Although the nature and origin of these high chromosome numbers have been long studied, it has remained unclear how paleopolyploidy influenced chromosomal and genome evolution in ferns. Here we analyzed transcriptome data from five fern and lycophyte species. We identified 3056 orthogroups across these five taxa with OrthoMCL and employed SATe to make gene family phylogenies. Paleopolyploidy was inferred by a novel topology counting method we developed and implemented in our MultiSpecies Paleopolyploid Script (MSPS). Our results confirm at least one round of ancient whole genome duplication in the fern phylogeny, shared by Asplenium, Pteridum and Cryptogramma. This study also contributed to development and improvement of our new analytical tool for inferring paleopolyplody shared among multiple species.


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1 - University of Arizona, Department of Ecology and Evolutionary Biology, Tucson, Arizona, 85721, United States

Keywords:
polyploidy
Paleopolyploidy
fern
lycophyte
Transcriptome.

Presentation Type: Recent Topics Poster
Session: P
Location: /
Date: Monday, July 28th, 2014
Time: 5:30 PM
Number: PRT021
Abstract ID:1259
Candidate for Awards:None


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