The genome of the extremophile crucifer Thellungiella parvula

Maheshi Dassanayake, Dongha Oh, Jeffrey S. Haas, Álvaro Gonzalez Hernández, Hyewon Hong, Shahjahan Ali, Daejin Yun, Ray Anthony Bressan, Jian-Kang Zhu, Hans Jürgen Bohnert, John McP Cheeseman

Research output: Contribution to journalArticlepeer-review

228 Scopus citations

Abstract

Thellungiella parvula is related to Arabidopsis thaliana and is endemic to saline, resource-poor habitats, making it a model for the evolution of plant adaptation to extreme environments. Here we present the draft genome for this extremophile species. Exclusively by next generation sequencing, we obtained the de novo assembled genome in 1,496 gap-free contigs, closely approximating the estimated genome size of 140 Mb. We anchored these contigs to seven pseudo chromosomes without the use of maps. We show that short reads can be assembled to a near-complete chromosome level for a eukaryotic species lacking prior genetic information. The sequence identifies a number of tandem duplications that, by the nature of the duplicated genes, suggest a possible basis for T. parvula's extremophile lifestyle. Our results provide essential background for developing genomically influenced testable hypotheses for the evolution of environmental stress tolerance. © 2011 Nature America, Inc. All rights reserved.
Original languageEnglish (US)
Pages (from-to)913-918
Number of pages6
JournalNature Genetics
Volume43
Issue number9
DOIs
StatePublished - Aug 7 2011

ASJC Scopus subject areas

  • Genetics

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