Biochemical and phenological characterization of diverse wheats and their association with drought tolerance genes.

Iftikhar Ali, Saeed Anwar, Ahmad Ali, Zahid Ullah, Dalal Nasser Binjawhar, Hassan Sher, Usama K Abdel-Hameed, Muhammad Aamir Khan, Khawar Majeed, Mariusz Jaremko

Research output: Contribution to journalArticlepeer-review

3 Scopus citations

Abstract

Drought is one of the most important wheat production limiting factor, and can lead to severe yield losses. This study was designed to examine the effect of drought stress on wheat physiology and morphology under three different field capacities (FC) viz. 80% (control), 50% (moderate) and 30% (severe drought stress) in a diverse collection of wheat germplasm including cultivars, landraces, synthetic hexaploid and their derivatives. Traits like grain weight, thousand grain weight and biomass were reduced by 38.23%, 18.91% and 26.47% respectively at 30% FC, whereas the reduction rate for these traits at 50% FC were 19.57%, 8.88% and 18.68%. In principal component analysis (PCA), the first two components PC1 and PC2 accounted for 58.63% of the total variation and separated the cultivars and landraces from synthetic-based germplasm. Landraces showed wide range of phenotypic variations at 30% FC compared to synthetic-based germplasm and improved cultivars. However, least reduction in grain weight was observed in improved cultivars which indicated the progress in developing drought resilient cultivars. Allelic variations of the drought-related genes including TaSnRK2.9-5A, TaLTPs-11, TaLTPs-12, TaSAP-7B-, TaPPH-13, Dreb-B1 and 1fehw3 were significantly associated with the phenological traits under drought stress in all 91 wheats including 40 landraces, 9 varieties, 34 synthetic hexaploids and 8 synthetic derivatives. The favorable haplotypes of 1fehw3, Dreb-B1, TaLTPs-11 and TaLTPs-12 increased grain weight, and biomass. Our results iterated the fact that landraces could be promising source to deploy drought adaptability in wheat breeding. The study further identified drought tolerant wheat genetic resources across various backgrounds and identified favourable haplotypes of water-saving genes which should be considered to develop drought tolerant varieties.
Original languageEnglish (US)
JournalBMC plant biology
Volume23
Issue number1
DOIs
StatePublished - Jun 19 2023

Bibliographical note

KAUST Repository Item: Exported on 2023-06-22
Acknowledgements: We would like to thank Princess Nourah bint Abdulrahman University Researchers Supporting Project number (PNURSP2023R155), Princess Nourah bint Abdulrahman University, Riyadh, Saudi Arabia. We would also like to thank King Abdullah University of Science and Technology (KAUST) for financial support in the process of publications.

ASJC Scopus subject areas

  • Plant Science

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