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Molecular Breeding

, 37:151 | Cite as

Development and validation of breeder-friendly KASPar markers for er1, a powdery mildew resistance gene in pea (Pisum sativum L.)

  • Yu Ma
  • Clarice J. Coyne
  • Dorrie Main
  • Stefano Pavan
  • Suli Sun
  • Zhendong Zhu
  • Xuxiao Zong
  • José Leitão
  • Rebecca J. McGeeEmail author
Short Communication

Abstract

Powdery mildew of pea is caused by Erysiphe pisi DC and is a serious threat to pea (Pisum sativum L.) production throughout much of the world. Development and utilization of genetic resistance to powdery mildew is considered an effective and sustainable strategy to manage this disease. One gene, er1, conferring powdery mildew resistance, was previously cloned and sequenced, and the functional markers for each resistance allele were reported. Allele-specific DNA markers are efficient and powerful tools to facilitate crop improvement and new cultivar development in breeding programs. However, extensive application of these markers is limited by gel-associated obstacles. In this study, eight breeder-friendly kompetitive allele-specific PCR (KASPar) markers were developed to overcome the problems of gel-based markers and increase the efficiency of genotypic screening. In order to identify additional pea germplasm with powdery mildew resistance, these KASPar markers were deployed and used to genotype a pea collection derived from the USDA pea single-plant (PSP) collection. Simultaneously, a phenotypic screening and a genotypic validation using the corresponding gel-based functional markers were conducted on the PSP collection. One pea accession, PI 142775, was identified by both phenotyping and genotyping to carry the allele er1-1 for powdery mildew resistance, indicating that the KASPar assay is an efficient and robust tool for breeding for powdery mildew resistance.

Keywords

er1 KASPar assay Marker-assisted breeding Powdery mildew Pisum sativum 

Notes

Acknowledgments

The authors thank Drs. Shimna Sudheesh, Sukhjiwan Kaur, and John W. Foster from the Centre for AgriBioscience, Bundoora, Australia for their contributions in this research.

Funding information

The authors gratefully acknowledge the funding from the Washington State Department of Agriculture Specialty Crop Block Grant K1273 and USA Dry Pea and Lentil Council Research grant.

Supplementary material

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Copyright information

© This is a U.S. government work and its text is not subject to copyright protection in the United States; however, its text may be subject to foreign copyright protection 2017

Authors and Affiliations

  • Yu Ma
    • 1
  • Clarice J. Coyne
    • 2
  • Dorrie Main
    • 1
  • Stefano Pavan
    • 3
  • Suli Sun
    • 4
  • Zhendong Zhu
    • 4
  • Xuxiao Zong
    • 4
  • José Leitão
    • 5
  • Rebecca J. McGee
    • 6
    Email author
  1. 1.Department of HorticultureWashington State UniversityPullmanUSA
  2. 2.Plant Germplasm Introduction and TestingUSDA ARSPullmanUSA
  3. 3.Section of Genetics and Plant Breeding, Department of Soil, Plant and Food ScienceUniversity of BariBariItaly
  4. 4.National Key Facility for Crop Gene Resources and Genetic Improvement, Institute of Crop ScienceChinese Academy of Agricultural SciencesBeijingChina
  5. 5.Laboratory of Genomics and Genetic Improvement, BioFIG, FCTUniversidade do AlgarveFaroPortugal
  6. 6.Grain Legume Genetics and Physiology Research UnitUSDA ARSPullmanUSA

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