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<p>Winter wheat is considered to have a more developed root system compared to spring one. A few studies showed a dependence of root system architecture from the allelic state of <i>Vrn-1</i> locus. The aim of this work was to obtain spring wheat plants with a large root system. To achieve this, we used a hybrid population derived from crossing a spring variety Saratovskaya 29 (S29) with small roots and a winter introgression line IL 5D-5 with large roots. By a direct selection for spring habit and large root system, such plants were obtained in F<sub>5</sub> generation. The spring habit of the plants was determined by dominant alleles <i>Vrn-A1a</i> and <i>Vrn-B1c</i> inherited from S29. They did not inhibit root development. The overall root system phenotype was similar to that of the winter line IL 5D-5. We suppose that a gene with a dominant mode of inheritance controlling large roots is located near <i>vrn-D1</i>. It was obtained from the introgression region of 5D chromosome from <i>Ae. tauschii</i>, present in the IL 5D-5 line. The F<sub>5</sub> plants were studied for flowering date, root length, root weight, technological properties of grain, and productivity components. They substantially exceeded the spring parent for root length and weight, protein and gluten content in grain, stem length, shoot number, grain number and weight from the plant and 1000-grain weight. Root length correlated with stem length and 1000-grain weight, root weight correlated with flour particle diameter.</p>

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Increasing the Size of the Root System of Spring Bread Wheat Using Introgression from Aegilops tauschii

  • 期刊论文

  • 发表日期：

    2026年5月20日

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  • Olga G. Smirnova,
  • Evgeniya V. Chumanova,
  • Malak Alkubesi,
  • Anastasia G. Chernook,
  • Alexander V. Simonov,
  • Tatyana A. Pshenichnikova

摘要

Winter wheat is considered to have a more developed root system compared to spring one. A few studies showed a dependence of root system architecture from the allelic state of Vrn-1 locus. The aim of this work was to obtain spring wheat plants with a large root system. To achieve this, we used a hybrid population derived from crossing a spring variety Saratovskaya 29 (S29) with small roots and a winter introgression line IL 5D-5 with large roots. By a direct selection for spring habit and large root system, such plants were obtained in F5 generation. The spring habit of the plants was determined by dominant alleles Vrn-A1a and Vrn-B1c inherited from S29. They did not inhibit root development. The overall root system phenotype was similar to that of the winter line IL 5D-5. We suppose that a gene with a dominant mode of inheritance controlling large roots is located near vrn-D1. It was obtained from the introgression region of 5D chromosome from Ae. tauschii, present in the IL 5D-5 line. The F5 plants were studied for flowering date, root length, root weight, technological properties of grain, and productivity components. They substantially exceeded the spring parent for root length and weight, protein and gluten content in grain, stem length, shoot number, grain number and weight from the plant and 1000-grain weight. Root length correlated with stem length and 1000-grain weight, root weight correlated with flour particle diameter.