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EST data suggest that poplar is an ancient polyploid
KTH, School of Biotechnology (BIO), Proteomics.ORCID iD: 0000-0003-3281-8088
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2005 (English)In: New Phytologist, ISSN 0028-646X, E-ISSN 1469-8137, Vol. 167, no 1, 165-170 p.Article in journal (Refereed) Published
Abstract [en]

We analysed the publicly available expressed sequence tag (EST) collections for the genus Populus to examine whether evidence can be found for large-scale gene-duplication events in the evolutionary past of this genus. The ESTs were clustered into unigenes for each poplar species examined. Gene families were constructed for all proteins deduced from these unigenes, and K-S dating was performed on all paralogs within a gene family. The fraction of paralogs was then plotted against the K-S values, which resulted in a distribution reflecting the age of duplicated genes in poplar. Sufficient EST data were available for seven different poplar species spanning four of the six sections of the genus Populus. For all these species, there was evidence that a large-scale gene-duplication event had occurred. From our analysis it is clear that all poplar species have shared the same large-scale gene-duplication event, suggesting that this event must have occurred in the ancestor of poplar, or at least very early in the evolution of the Populus genus.

Place, publisher, year, edition, pages
2005. Vol. 167, no 1, 165-170 p.
Keyword [en]
EST (expressed sequence tag) data, evolution, fossil record, genome duplication, K-S dating, polyploidy, Populus (poplar), expressed sequence tags, nucleotide substitution, phylogenetic analysis, functional genomics, duplicate genes, arabidopsis, model, evolution, populus, program
URN: urn:nbn:se:kth:diva-14794DOI: 10.1111/j.1469-8137.2005.01378.xISI: 000229581600017ScopusID: 2-s2.0-21244483590OAI: diva2:332835
QC 20100525Available from: 2010-08-05 Created: 2010-08-05Bibliographically approved

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Sterky, Fredrik
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