The Aegilops tauschii genome reveals multiple impacts of transposons

Wheat is an important global crop with an extremely large and complex genome that contains more transposable elements (TEs) than any other known crop species. Here, we generated a chromosome-scale, high-quality reference genome of Aegilops tauschii , the donor of the wheat D genome, in which 92.5% s...

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Veröffentlicht in:Nature plants 2017-12, Vol.3 (12), p.946-955
Hauptverfasser: Zhao, Guangyao, Zou, Cheng, Li, Kui, Wang, Kai, Li, Tianbao, Gao, Lifeng, Zhang, Xiaoxia, Wang, Hongjin, Yang, Zujun, Liu, Xu, Jiang, Wenkai, Mao, Long, Kong, Xiuying, Jiao, Yuannian, Jia, Jizeng
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container_issue 12
container_start_page 946
container_title Nature plants
container_volume 3
creator Zhao, Guangyao
Zou, Cheng
Li, Kui
Wang, Kai
Li, Tianbao
Gao, Lifeng
Zhang, Xiaoxia
Wang, Hongjin
Yang, Zujun
Liu, Xu
Jiang, Wenkai
Mao, Long
Kong, Xiuying
Jiao, Yuannian
Jia, Jizeng
description Wheat is an important global crop with an extremely large and complex genome that contains more transposable elements (TEs) than any other known crop species. Here, we generated a chromosome-scale, high-quality reference genome of Aegilops tauschii , the donor of the wheat D genome, in which 92.5% sequences have been anchored to chromosomes. Using this assembly, we accurately characterized genic loci, gene expression, pseudogenes, methylation, recombination ratios, microRNAs and especially TEs on chromosomes. In addition to the discovery of a wave of very recent gene duplications, we detected that TEs occurred in about half of the genes, and found that such genes are expressed at lower levels than those without TEs, presumably because of their elevated methylation levels. We mapped all wheat molecular markers and constructed a high-resolution integrated genetic map corresponding to genome sequences, thereby placing previously detected agronomically important genes/quantitative trait loci (QTLs) on the Ae. tauschii genome for the first time. The wild grass Aegilops tauschii is a wheat progenitor. A high-quality genome sequence, along with methylome and transcriptome data, provides insights on domestication and the effect of transposons, and offers a resource for wheat improvement.
doi_str_mv 10.1038/s41477-017-0067-8
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subjects 631/1647/514/1948
631/208/212/2305
631/449/2492
Aegilops tauschii
Biomedical and Life Sciences
Chromosome Mapping
Chromosomes
Chromosomes, Plant
DNA methylation
DNA Transposable Elements
Domestication
Evolution, Molecular
Gene expression
Gene Expression Regulation, Plant
Gene mapping
Gene sequencing
Genes
Genetic Markers - genetics
Genome, Plant
Genomes
Goat grass
Life Sciences
Methylation
miRNA
Nucleotide sequence
Plant Sciences
Poaceae - genetics
Pseudogenes
Quantitative Trait Loci
Recombination
Transcriptomes
Transposons
Wheat
title The Aegilops tauschii genome reveals multiple impacts of transposons
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