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Breeding for water-use efficiency in wheat: progress, challenges and prospects.

Aqsa Hafeez1, Shehzad Ali2, Muhammad Ammar Javed3

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Drought significantly impacts wheat yield. Genetic strategies, including root system architecture (RSA) and biomarkers, are key to developing drought-tolerant wheat varieties with improved water-use efficiency (WUE).

Keywords:
DroughtGenetic engineeringPlant breedingRoot architecture

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Area of Science:

  • Agricultural Science
  • Plant Biology
  • Genetics

Background:

  • Drought stress is a major threat to global wheat production, causing significant yield losses.
  • Improving water-use efficiency (WUE) is critical for wheat resilience in arid and semi-arid regions.
  • Traditional breeding methods face challenges in rapidly developing drought-tolerant varieties.

Purpose of the Study:

  • To explore genetic approaches for enhancing drought tolerance in wheat.
  • To highlight the importance of root system architecture (RSA) in water uptake and drought resilience.
  • To review advanced techniques for accelerating the development of drought-resilient wheat.

Main Methods:

  • Review of genetic strategies for drought tolerance.
  • Analysis of root system architecture (RSA) traits and their contribution to water-use efficiency (WUE).
  • Discussion of biomarkers, high-throughput phenotyping, and quantitative trait loci (QTL) gene identification.

Main Results:

  • Genetic improvement offers a viable path to enhance wheat's response to drought stress.
  • Specific traits like deep roots, delayed senescence, and late wilting point are crucial for drought tolerance.
  • Advanced techniques like genetic engineering can introduce beneficial RSA traits.

Conclusions:

  • Targeted genetic modifications and selection of key traits are essential for developing drought-tolerant wheat.
  • Integrating biomarkers and high-throughput methods accelerates breeding for improved water-use efficiency (WUE).
  • Genetic engineering holds significant potential for creating resilient wheat germplasm against drought.