Genome scans capture key adaptation and historical hybridization signatures in tetraploid wheat

Par Conseil national de recherches du Canada

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DOI	Trouver le DOI : https://doi.org/10.1002/tpg2.20410
Auteur	Rechercher : Sertse, Demissew¹Identifiant ORCID : https://orcid.org/0000-0003-1306-0419; Rechercher : Haile, Jemanesh K.; Rechercher : Sari, Ehsan; Rechercher : Klymiuk, Valentyna Identifiant ORCID : https://orcid.org/0000-0001-9308-7886; Rechercher : N'Diaye, Amidou Identifiant ORCID : https://orcid.org/0000-0001-7769-7801; Rechercher : Pozniak, Curtis J.Identifiant ORCID : https://orcid.org/0000-0002-7536-3856; Rechercher : Cloutier, Sylvie Identifiant ORCID : https://orcid.org/0000-0001-9934-5540; Rechercher : Kagale, Sateesh¹
Affiliation	Conseil national de recherches du Canada. Développement des cultures et des ressources aquatiques
Format	Texte, Article
Résumé	Tetraploid wheats (Triticum turgidum L.), including durum wheat (T. turgidum ssp. durum (Desf.) Husn.), are important crops with high nutritional and cultural values. However, their production is constrained by sensitivity to environmental conditions. In search of adaptive genetic signatures tracing historical selection and hybridization events, we performed genome scans on two datasets: (1) Durum Global Diversity Panel comprising a total of 442 tetraploid wheat and wild progenitor accessions including durum landraces (n = 286), domesticated emmer (T. turgidum ssp. dicoccum (Schrank) Thell.; n = 103) and wild emmer (T. turgidum ssp. dicoccoides (Korn. ex Asch. & Graebn.) Thell.; n = 53) wheats genotyped using the 90K single nucleotide polymorphism (SNP) array, and (2) a second dataset comprising a total 121 accessions of nine T. turgidum subspecies including wild emmer genotyped with >100 M SNPs from whole-genome resequencing. The genome scan on the first dataset detected six outlier loci on chromosomes 1A, 1B, 3A (n = 2), 6A, and 7A. These loci harbored important genes for adaptation to abiotic stresses, phenological responses, such as seed dormancy, circadian clock, flowering time, and key yield-related traits, including pleiotropic genes, such as HAT1, KUODA1, CBL1, and ZFN1. The scan on the second dataset captured a highly differentiated region on chromosome 2B that shows significant differentiation between two groups: one group consists of Georgian (T. turgidum ssp. paleocolchicum A. Love & D. Love) and Persian (T. turgidum ssp. carthlicum (Nevski) A. Love & D. Love) wheat accessions, while the other group comprises all the remaining tetraploids including wild emmer. This is consistent with a previously reported introgression in this genomic region from T. timopheevii Zhuk. which naturally cohabit in the Georgian and neighboring areas. This region harbored several adaptive genes, including the thermomorphogenesis gene PIF4, which confers temperature-resilient disease resistance and regulates other biological processes. Genome scans can be used to fast-track germplasm housed in gene banks and in situ; which helps to identify environmentally resilient accessions for breeding and/or to prioritize them for conservation.
Date de publication	2023-11-16
Maison d’édition	Wiley Crop Science Society of America
Licence	Creative Commons Attribution 4.0 International (CC BY 4.0 DEED) https://creativecommons.org/licenses/by/4.0/deed.fr
Dans	The Plant Genome (16 novembre 2023).
Langue	anglais
Sous presse	Oui
Publications évaluées par des pairs	Oui
Exporter la notice	Exporter en format RIS
Signaler une correction	Signaler une correction (s'ouvre dans un nouvel onglet)
Identificateur de l’enregistrement	4ebdc488-6724-498d-93d9-4038726e79ad
Enregistrement créé	2023-12-20
Enregistrement modifié	2023-12-20

Date de modification :: 2024-07-17