Genome-Wide Association Analyses Identify QTL Hotspots for Yield and Component Traits in Durum Wheat Grown under Yield Potential, Drought, and Heat Stress Environments

Frontiers in Plant Science
Sivakumar SukumaranCarolina Sansaloni

Abstract

Understanding the genetic bases of economically important traits is fundamentally important in enhancing genetic gains in durum wheat. In this study, a durum panel of 208 lines (comprised of elite materials and exotics from the International Maize and Wheat Improvement Center gene bank) were subjected to genome wide association study (GWAS) using 6,211 DArTseq single nucleotide polymorphisms (SNPs). The panel was phenotyped under yield potential (YP), drought stress (DT), and heat stress (HT) conditions for 2 years. Mean yield of the panel was reduced by 72% (to 1.64 t/ha) under HT and by 60% (to 2.33 t/ha) under DT, compared to YP (5.79 t/ha). Whereas, the mean yield of the panel under HT was 30% less than under DT. GWAS identified the largest number of significant marker-trait associations on chromosomes 2A and 2B withp-values 10-06to 10-03and the markers from the whole study explained 7-25% variation in the traits. Common markers were identified for stress tolerance indices: stress susceptibility index, stress tolerance, and stress tolerance index estimated for the traits under DT (82 cM on 2B) and HT (68 and 83 cM on 3B; 25 cM on 7A). GWAS of irrigated (YP and HT combined), stressed (DT and HT combined), combined analysis o...Continue Reading

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Citations

Dec 12, 2019·The Plant Journal : for Cell and Molecular Biology·Rebecca F TaliniMatteo Dell'Acqua
Jun 30, 2019·International Journal of Molecular Sciences·Ahmed SallamAndreas Börner
May 13, 2020·BMC Plant Biology·Samuel Adeyemi AdewaleAna Luísa Garcia-Oliveira
Sep 30, 2020·International Journal of Molecular Sciences·Osvin ArriagadaAndrés R Schwember
Aug 6, 2019·Frontiers in Plant Science·Shubin WangGuangmin Xia
Feb 23, 2020·Frontiers in Plant Science·Jessica SchmidtDelphine Fleury
May 12, 2019·Plant, Cell & Environment·Long LiRuilian Jing
Oct 9, 2020·TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik·Xiaobo WangQixin Sun
Dec 1, 2020·Frontiers in Plant Science·Frank MaulanaXue-Feng Ma
Mar 27, 2021·TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik·Reem JoukhadarHans D Daetwyler
Oct 17, 2021·TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik·Michael O ItamHisashi Tsujimoto

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Methods Mentioned

BETA
environmental stress
electrophoresis
genotyping
Genome Sequencing

Software Mentioned

DArT
STRUCTURE
Ensemble genome browser
SilicoDArTs
R
MEGA7
META
sommer
TASSEL
BLASTN

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