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      Permanent link:
      https://www.ias.ac.in/article/fulltext/jgen/096/06/0951-0957

    • Keywords

       

      wheat; leaf rust; molecular marker; gene pyramiding; marker-assisted selection.

    • Abstract

       

      This study was undertaken to pyramid two effective leaf rust resistance genes (Lr19 and Lr24) derived from Thinopyrum (syn. Agropyron), in the susceptible, but agronomically superior wheat cultivar HD2733 using marker-assisted selection. In the year 2001, HD2733 was released for irrigated timely sown conditions of the north eastern plains zone (NEPZ) of India became susceptibleto leaf rust, a major disease of the region. Background selection helped in developing near-isogenic lines (NILs) of HD2733 with Lr19 and Lr24 with 97.27 and 98.94%, respectively, of genomic similarity with the parent cultivar, after two backcrossing and one generation of selfing.NILs were intercrossed to combine the genes Lr19 and Lr24. The combination of these two genes in the cultivarHD2733 is expected to provide durable leaf rust resistance in farmers’ fields.

    • Author Affiliations

       

      MONA SINGH1 2 N. MALLICK1 S. CHAND3 P. KUMARI1 J. B. SHARMA1 M. SIVASAMY4 P. JAYAPRAKASH4 K. V. PRABHU1 S. K. JHA1 VINOD 1

      1. Division of Genetics, ICAR-Indian Agricultural Research Institute, New Delhi 110 012, India
      2. Department of Bioscience and Biotechnology, Banasthali University, Tonk, Rajasthan 304 022, India
      3. School of Life Sciences, Devi Ahilya Vishwavidyalaya, Khandwa Road, Indore 452 001, India
      4. Regional Station, ICAR-Indian Agricultural Research Institute, Wellington 643 231, India
    • Dates

       
  • Journal of Genetics | News

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