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Combining Genetic and Phenotypic Analyses for Detecting Bread Wheat Genotypes of Drought Tolerance through
Mohammed Sallam1, Abdelhalim Ghazy1, Abdullah Al-Doss1
1Department of Plant Production, College of Food and Agriculture Sciences, King Saud University, Riyadh 11451, Saudi Arabia.
Life (Basel, Switzerland)
|February 24, 2024
Summary
This study combined genotyping and phenotyping to identify drought-tolerant wheat. Simple sequence repeat (SSR) markers and agro-physio-biochemical traits successfully identified diverse genotypes for improved wheat breeding.
Area of Science:
- Agricultural Science
- Plant Breeding
- Genetics
Background:
- Promoting drought tolerance in wheat is crucial for food security.
- Combining phenotyping and genotyping offers a powerful approach for wheat improvement.
Purpose of the Study:
- To assess genetic diversity in wheat genotypes using SSR markers.
- To identify drought-tolerant wheat genotypes through agro-physio-biochemical trait analysis.
- To associate SSR markers with traits for efficient selection.
Main Methods:
- Simple sequence repeat (SSR) marker analysis of 60 wheat genotypes.
- Field evaluation of 13 genetically diverse genotypes under drought stress.
- Estimation of 30 agro-physio-biochemical traits.
- Multivariate analyses including Hierarchical Cluster (HC) and Principal Component Analysis (PCA).
Main Results:
- Hierarchical cluster analysis of SSR markers classified genotypes into five drought tolerance categories.
- Six traits showed high heritability and genetic gain.
- Nine key traits (e.g., grain yield, flag leaf area) were identified as effective screening tools.
- SSR markers were significantly correlated with identified traits, aiding selection.
Conclusions:
- A combined phenotyping and genotyping approach effectively identifies drought-tolerant wheat.
- Specific SSR markers and agro-physio-biochemical traits can assist in selecting superior wheat genotypes.
- This study provides valuable insights into the genetic and phenotypic basis of drought tolerance in wheat.
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