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Related Experiment Videos

A novel gene for rust resistance.

Richard C Staples1

  • 1Boyce Thompson Institute, Cornell University, Ithaca, NY 14853, USA. rcs8@cornell.edu

Trends in Plant Science
|April 25, 2003
PubMed
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Researchers have cloned the Rpg1 gene, providing barley resistance to stem rust fungus Puccinia graminis. This gene confers resistance to susceptible varieties and may represent a new class of plant resistance genes.

Area of Science:

  • Plant genetics
  • Agricultural science
  • Mycology

Background:

  • The Rpg1 gene has been crucial for North American barley cultivars, offering resistance to stem rust (Puccinia graminis f.sp. tritici) for over six decades.
  • Stem rust poses a significant threat to barley production, necessitating robust resistance mechanisms.

Purpose of the Study:

  • To clone the Rpg1 gene responsible for stem rust resistance in barley.
  • To investigate the potential of the cloned Rpg1 gene in conferring resistance to susceptible barley varieties.

Main Methods:

  • Gene cloning techniques were employed to isolate the Rpg1 gene.
  • Transformation of susceptible barley varieties with the cloned Rpg1 gene.

Main Results:

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  • The Rpg1 gene was successfully cloned.
  • A single copy of the Rpg1 gene conferred resistance to a susceptible barley variety.
  • Progeny from transformed varieties exhibited consistently higher resistance than the original source variety, an unexplained phenomenon.

    • Conclusions:

    • The cloning of Rpg1 provides a valuable tool for developing disease-resistant barley cultivars.
    • The Rpg1 gene's unique resistance mechanism suggests it may belong to a novel class of plant resistance genes.
    • Further research is warranted to understand the enhanced resistance observed in progeny and the gene's mode of action.