Potato Research

, Volume 41, Issue 3, pp 219–228 | Cite as

Progeny tests to identify diploid potato clones homozygous at loci controlling resistance to PLRV

  • Bogdan Flis
  • Iwona Wasilewicz-Flis
Full Papers


Using potato parental lines homozygous at a locus or loci controlling resistance to potato leafroll virus (PLRV) can give advantages in the selection of resistant forms. In order to identify homozygous diploid clones their test-cross families were evaluated. All the clones that were test-crossed expressed resistance in primarily- and secondarily-infected plants and etiolated sprouts, and were derived from mating genotypes highly resistant to PLRV. Genotypes from test-cross families varied in resistance to PLRV, and one family was found which had only resistant genotypes, suggesting that the resistant parent of this progeny was homozygous at resistance loci. Evidence was gathered that resistance in some diploid clones may result from resistance to virus multiplication as well as restricted virus transport from leaves to tubers.

Additional keywords

homozygous genotypes Solanum tuberosum L. 


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Copyright information

© Kluwer Academic Publishers 1998

Authors and Affiliations

  • Bogdan Flis
    • 1
  • Iwona Wasilewicz-Flis
    • 1
  1. 1.Młochów Research CenterPlant Breeding and Acclimatization InstituteRozalinPoland

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