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<p>Wheat stripe rust and alkaline-saline soils are two major factors affecting wheat planting areas globally. Producing wheat genotypes that tolerate the combined effect of these two factors will enhance wheat production. A&#xa0;set of 16&#xa0;wheat genotypes was evaluated for yield and stripe rust adult plant resistance under normal and alkaline-saline (AS) soils. The effects of single stripe rust stress (Yr) as well as combined Yr + AS stress were tested on yield and physiological parameters. Similar correlations were observed between each pair of yield traits, physiological traits, and stripe rust resistance under the tested environments. Misr&#xa0;4 showed high performance under combined stress, as well as high stripe rust resistance. Combined Yr + AS stress had a&#xa0;significantly negative effect on yield compared to Yr stress alone. Increases in chlorophyll&#xa0;a, chlorophyll&#xa0;b, and and proline content (PC) improved wheat performance under combined stress conditions and enhanced stripe rust resistance. However, these factors did not play a&#xa0;role in improving wheat performance under single Yr stress. The tested traits could be used in selecting high-performance genotypes under single Yr and combined Yr + AS stresses, except for total chlorophyll and plant height. Understanding the role of increased wheat adaptation to combined Yr + AS stress will accelerate wheat breeding programs by producing genotypes that can confront the harmful effects of global climate change.</p>

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Effect of Combined Alkaline-saline and Stripe Rust Stresses on Physiological and Yield Traits in Bread Wheat

  • 期刊论文

  • 发表日期：

    2025年1月8日

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  • A. M. Sharshar,
  • Samar M. Esmail,
  • Dina E. Elmoghazy,
  • Walaa A. Elhag,
  • M. S. Genedy,
  • Amira M. I. Mourad

摘要

Wheat stripe rust and alkaline-saline soils are two major factors affecting wheat planting areas globally. Producing wheat genotypes that tolerate the combined effect of these two factors will enhance wheat production. A set of 16 wheat genotypes was evaluated for yield and stripe rust adult plant resistance under normal and alkaline-saline (AS) soils. The effects of single stripe rust stress (Yr) as well as combined Yr + AS stress were tested on yield and physiological parameters. Similar correlations were observed between each pair of yield traits, physiological traits, and stripe rust resistance under the tested environments. Misr 4 showed high performance under combined stress, as well as high stripe rust resistance. Combined Yr + AS stress had a significantly negative effect on yield compared to Yr stress alone. Increases in chlorophyll a, chlorophyll b, and and proline content (PC) improved wheat performance under combined stress conditions and enhanced stripe rust resistance. However, these factors did not play a role in improving wheat performance under single Yr stress. The tested traits could be used in selecting high-performance genotypes under single Yr and combined Yr + AS stresses, except for total chlorophyll and plant height. Understanding the role of increased wheat adaptation to combined Yr + AS stress will accelerate wheat breeding programs by producing genotypes that can confront the harmful effects of global climate change.