Chromosome-based survey sequencing reveals the genome organization of wild wheat progenitor Triticum dicoccoides


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Wild emmer wheat (Triticum turgidum ssp. dicoccoides) is the progenitor of wheat. We performed chromosome-based survey sequencing of the 14 chromosomes, examining repetitive sequences, protein-coding genes, miRNA/target pairs and tRNA genes, as well as syntenic relationships with related grasses. We found considerable differences in the content and distribution of repetitive sequences between the A and B subgenomes. The gene contents of individual chromosomes varied widely, not necessarily correlating with chromosome size. We catalogued candidate agronomically important loci, along with new alleles and flanking sequences that can be used to design exome sequencing. Syntenic relationships and virtual gene orders revealed several small-scale evolutionary rearrangements, in addition to providing evidence for the 4AL-5AL-7BS translocation in wild emmer wheat. Chromosome-based sequence assemblies contained five novel miRNA families, among 59 families putatively encoded in the entire genome which provide insight into the domestication of wheat and an overview of the genome content and organization.

Original languageEnglish
Pages (from-to)2077-2087
Number of pages11
JournalPlant Biotechnology Journal
Issue number12
StatePublished - Dec 2018


FundersFunder number
Junta de Andalucia
Montana Plant Sciences Endowment
National Program of Sustainability I)
Ministerstvo Školství, Mládeže a TělovýchovyLO1204
Grantová Agentura České RepublikyP501/12/G090
Ministerio de Economía y CompetitividadCGL2016-79790-P, P12-AGR-0482, AGL2016-77149-C2-1-P


    • chromosome sorting
    • comparative genomics
    • hexaploid wheat
    • next-generation sequencing
    • wild emmer wheat


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