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Heat Stress-Tolerant Quantitative Trait Loci Identified Using Backcrossed Recombinant Inbred Lines Derived from Intra-Specifically Diverse Aegilops tauschii Accessions.
Ahmed, Monir Idres Yahya; Kamal, Nasrein Mohamed; Gorafi, Yasir Serag Alnor; Abdalla, Modather Galal Abdeldaim; Tahir, Izzat Sidahmed Ali; Tsujimoto, Hisashi.
Afiliación
  • Ahmed MIY; United Graduate School of Agricultural Sciences, Tottori University, Tottori 680-8550, Japan.
  • Kamal NM; Arid Land Research Center, Tottori University, Tottori 680-0001, Japan.
  • Gorafi YSA; Agricultural Research Corporation (ARC), Wad-Medani P.O. Box 126, Sudan.
  • Abdalla MGA; Agricultural Research Corporation (ARC), Wad-Medani P.O. Box 126, Sudan.
  • Tahir ISA; International Platform for Dryland Research and Education, Tottori University, Tottori 680-0001, Japan.
  • Tsujimoto H; Agricultural Research Corporation (ARC), Wad-Medani P.O. Box 126, Sudan.
Plants (Basel) ; 13(3)2024 Jan 24.
Article en En | MEDLINE | ID: mdl-38337879
ABSTRACT
In the face of climate change, bringing more useful alleles and genes from wild relatives of wheat is crucial to develop climate-resilient varieties. We used two populations of backcrossed recombinant inbred lines (BIL1 and BIL2), developed by crossing and backcrossing two intra-specifically diverse Aegilops tauschii accessions from lineage 1 and lineage 2, respectively, with the common wheat cultivar 'Norin 61'. This study aimed to identify quantitative trait loci (QTLs) associated with heat stress (HS) tolerance. The two BILs were evaluated under heat stress environments in Sudan for phenology, plant height (PH), grain yield (GY), biomass (BIO), harvest index (HI), and thousand-kernel weight (TKW). Grain yield was significantly correlated with BIO and TKW under HS; therefore, the stress tolerance index (STI) was calculated for these traits as well as for GY. A total of 16 heat-tolerant lines were identified based on GY and STI-GY. The QTL analysis performed using inclusive composite interval mapping identified a total of 40 QTLs in BIL1 and 153 QTLs in BIL2 across all environments. We detected 39 QTLs associated with GY-STI, BIO-STI, and TKW-STI in both populations (14 in BIL1 and 25 in BIL2). The QTLs associated with STI were detected on chromosomes 1A, 3A, 5A, 2B, 4B, and all the D-subgenomes. We found that QTLs were detected only under HS for GY on chromosome 5A, TKW on 3B and 5B, PH on 3B and 4B, and grain filling duration on 2B. The higher number of QTLs identified in BIL2 for heat stress tolerance suggests the importance of assessing the effects of intraspecific variation of Ae. tauschii in wheat breeding as it could modulate the heat stress responses/adaptation. Our study provides useful genetic resources for uncovering heat-tolerant QTLs for wheat improvement for heat stress environments.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Plants (Basel) Año: 2024 Tipo del documento: Article País de afiliación: Japón Pais de publicación: Suiza
Texto completo
Añadir a Mi BVS
Imprimir
XML
PubMed Links
Buscar en Google

Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Plants (Basel) Año: 2024 Tipo del documento: Article País de afiliación: Japón Pais de publicación: Suiza