Theoretical and Applied Genetics

, Volume 93, Issue 5–6, pp 859–863 | Cite as

Molecular mapping of genes for resistance to rice blast (Pyricularia grisea Sacc.)

  • Z. H. Yu
  • D. J. Mackill
  • J. M. Bonman
  • S. R. McCouch
  • E. Guiderdoni
  • J. L. Notteghem
  • S. D. Tanksley
Article

Abstract

Two dominant genes conferring complete resistance to specific isolates of the rice blast fungus, Pyricularia grisea Sacc., were located on the molecular map of rice in this study. Pi-l(t) is a blast resistance gene derived from the cultivar ‘LAC23’. Its map location was determined using a pair of nearly isogenic lines (NILs) and a B6F3 segregating population from which the isoline was derived. RFLP analysis showed that Pi-l(t) is located near the end of chromosome 11, linked to RZ536 at a distance of 14.0±4.5 centiMorgans (cM). A second gene, derived from the cultivar ‘Apura’, was mapped using a rice doubled-haploid (DH) population. This gene was located on chromosome 12, flanked by RG457 and RG869, at a distance of 13.5+-4.3 cM and 17.7+-4.5 cM, respectively. The newly mapped gene on chromosome 12 may be allelic or closely linked toPi-ta. (=Pi-4(t)), a gene derived from Tetep that was previously reported to be linked to RG869 at a distance of 15.4±4.7 cM. The usefulness of markers linked to blast resistance genes will be discussed in the context of breeding for durable blast resistance.

Key words

Disease resistance Rice (Oryza sativa L.) Blast (Pyricularia grisea Sacc.) Restriction fragment length polymorphism (RFLP) Gene mapping 

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Copyright information

© Springer-Verlag 1996

Authors and Affiliations

  • Z. H. Yu
    • 1
  • D. J. Mackill
    • 2
  • J. M. Bonman
    • 3
  • S. R. McCouch
    • 1
  • E. Guiderdoni
    • 4
  • J. L. Notteghem
    • 4
  • S. D. Tanksley
    • 1
  1. 1.Department of Plant Breeding and BiometryCornell UniversityIthacaUSA
  2. 2.USDA-ARS, Department of Agronomy and Range ScienceUniversity of CaliforniaDavisUSA
  3. 3.Du Pont Agricultural ProductsNewarkUSA
  4. 4.Centre International de Recherches Agronomiques en cooperation pour le DéveloppementMontpellier CedexFrance
  5. 5.USDA-ARS-SCRLCollege StationUSA

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