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Genetic analysis and molecular mapping of a wheat gene conferring tolerance to the greenbug (Schizaphis graminum Rondani)

Theoretical and Applied Genetics volume 109, pages 289–293 (2004)Cite this article

Abstract

The greenbug, Schizaphis graminum (Rondani), is one of the major pests of wheat worldwide. The efficient utilization of wheat genes expressing resistance to greenbug infestation is highly dependent on a clear understanding of their relationships. The use of such genes will be further facilitated through the use of molecular markers linked to resistance genes. The present study involved several F2 wheat populations derived from crosses between susceptible cultivars and resistant germplasm carrying different greenbug resistance genes. These populations were used to characterize the inheritance of a wheat gene (Gbz) conferring tolerance to greenbug biotype I, to identify molecular markers linked to Gbz, and to investigate the relationship between Gbz and Gb3, a previously identified greenbug resistance gene. Our results indicated that Gbz is inherited as a single dominant gene. Microsatellite marker Xwmc157 is completely linked to Gbz, and Xbarc53 and Xgdm46 flank Gbz at distances of 5.1 and 9.5 cM, respectively. Selection of Gbz using marker Xwmc157 alone gives breeders 100% selection accuracy. Gbz may be placed in the distal region of the long arm of the wheat chromosome 7D. The results of allelism tests indicated that Gbz is either allelic or tightly linked to Gb3.

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Acknowledgements

This work was financially supported by the Kansas Crop Improvement Association, the Kansas Agricultural Experiment Station, the Kansas Wheat Commission, and a KSU-CSREES IPM minigrant to L.C. Zhu. We thank Dr. Tom Harvey for the kind supply of greenbug biotype I, and Dr. Xuming Liu and Sharon Starkey for all their suggestions and help. Kansas Agricultural Experimental Station Contribution No. 04-045-J.

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Affiliations

  1. Department of Entomology, Kansas State University, Manhattan, KS 66506, USA

    L. C. Zhu, C. M. Smith & E. V. Boyko

  2. Department of Agronomy, Kansas State University, Manhattan, KS 66506, USA

    A. Fritz

  3. Department of Zoology, Southern Illinois University, Carbondale, IL 62901, USA

    M. B. Flinn

Authors
  1. L. C. Zhu
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  2. C. M. Smith
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  3. A. Fritz
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  4. E. V. Boyko
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  5. M. B. Flinn
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Corresponding author

Correspondence to C. M. Smith.

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Communicated by D.A. Hoisington

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Zhu, L.C., Smith, C.M., Fritz, A. et al. Genetic analysis and molecular mapping of a wheat gene conferring tolerance to the greenbug (Schizaphis graminum Rondani). Theor Appl Genet 109, 289–293 (2004). https://doi.org/10.1007/s00122-004-1632-x

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  • DOI: https://doi.org/10.1007/s00122-004-1632-x

Keywords

  • Susceptible Parent
  • Single Dominant Gene
  • Microsatellite Primer
  • Wheat Germplasm
  • Inheritance Mode