A chromosome-based draft sequence of the hexaploid bread wheat (Triticum aestivum) genome

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DOIResolve DOI: http://doi.org/10.1126/science.1251788
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TypeArticle
Journal titleScience
ISSN0036-8075
Volume345
Issue6194
Article number1251788
Subjectchromosome; gene expression; genetic marker; genome; polyploidy; wheat; diploidy; gene duplication; gene locus; gene loss; gene sequence; genetic conservation; plant chromosome; plant genome; polyploidy; sequence homology; tetraploidy; Triticum aestivum
AbstractAn ordered draft sequence of the 17-gigabase hexaploid bread wheat (Triticum aestivum) genome has been produced by sequencing isolated chromosome arms. We have annotated 124,201 gene loci distributed nearly evenly across the homeologous chromosomes and subgenomes. Comparative gene analysis of wheat subgenomes and extant diploid and tetraploid wheat relatives showed that high sequence similarity and structural conservation are retained, with limited gene loss, after polyploidization. However, across the genomes there was evidence of dynamic gene gain, loss, and duplication since the divergence of the wheat lineages. A high degree of transcriptional autonomy and no global dominance was found for the subgenomes. These insights into the genome biology of a polyploid crop provide a springboard for faster gene isolation, rapid genetic marker development, and precise breeding to meet the needs of increasing food demand worldwide.
Publication date
LanguageEnglish
AffiliationAquatic and Crop Resource Development; National Research Council Canada
Peer reviewedYes
NRC numberNRC-ACRD-56011
NPARC number21272884
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Record identifier1b1bdc02-3b35-4804-8cf8-69093ac64bed
Record created2014-12-03
Record modified2016-05-09
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