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Identification of Wheat Ideotype under Multiple Abiotic Stresses and Complex Environmental Interplays by Multivariate
Ibrahim Al-Ashkar1, Mohammed Sallam1, Abdullah Ibrahim1
1Department of Plant Production, College of Food and Agriculture Sciences, King Saud University, Riyadh 11451, Saudi Arabia.
Plants (Basel, Switzerland)
|October 28, 2023
Summary
Developing stress-tolerant wheat is crucial for global food security. This study identified stable, high-yielding wheat genotypes using advanced statistical methods to improve crop resilience against multiple abiotic stresses.
Area of Science:
- Agricultural Science
- Plant Breeding
- Genetics
Background:
- Global food security necessitates a 60% increase in wheat productivity by 2050.
- Abiotic stresses significantly reduce wheat yields worldwide, demanding stress-tolerant varieties.
- Understanding genetic basis and plant stress tolerance is key to developing resilient crops.
Purpose of the Study:
- To identify stable and high-yielding wheat genotypes adaptable to multiple abiotic stresses.
- To evaluate the effectiveness of integrated multivariate statistical techniques in genotype selection.
- To discover novel genetic resources for enhancing wheat productivity under stress.
Main Methods:
- Utilized multivariate analysis, including Additive Main Effects and Multiplicative Interaction (AMMI) model, Linear Discriminant Analysis (LDA), Multi-trait Genotype-Ideotype Distance Index (MGIDI), and Weighted Average of Absolute Scores (WAASB) index.
- Assessed twenty wheat genotypes across multiple environments under various abiotic stresses.
- Employed six tolerance multi-indices for comprehensive genotype evaluation.
Main Results:
- The AMMI model indicated performance variations inconsistent with trait and genotype differences.
- MGIDI analysis identified G01, G12, G16, and G02 as stable and appropriate genotypes.
- Biplot analysis highlighted G01, G03, G11, G16, G17, G18, and G20 for stability and high tolerance.
- Pooled analyses (LDA, MGIDI, WAASB) confirmed G01 as the most stable genotype.
Conclusions:
- Genotype G01 is a promising genetic resource for enhancing wheat productivity and stability under multiple abiotic stresses.
- Integrated application of multivariate statistical techniques effectively supports plant breeders in multi-environment trials.
- The study provides a robust framework for selecting superior wheat genotypes for stress-prone environments.
