Euphytica

, Volume 81, Issue 2, pp 143–149

Genetic variation for resistance to Phytophthora fragariae var. rubi in red raspberries

  • Rolf Nestby
  • Nina Heiberg
Article

DOI: 10.1007/BF00025426

Cite this article as:
Nestby, R. & Heiberg, N. Euphytica (1995) 81: 143. doi:10.1007/BF00025426

Summary

The inheritance of root rot resistance in red raspberry, caused by Phytophtora fragariae var. rubi, was investigated using two experimental breeding designs. Design A was not randomly mated and genetic parameters could not be calculated. Design B was therefore randomly mated to make it possible to do such estimations. Considerable genetic variation was associated with the recorded traits on seedlings tested in a glasshouse. Disease index and % survival were both found to be highly heritable with broad sense heritabilities (H2) close to 0.9 in each design. Estimates of narrow sense heritability (h2), indicated that progress towards resistance would be moderate. In the first design the cultivars ‘Festival’, ‘Asker’, ‘Boyne’ and ‘Sentry’ and the clones N85-02-13 and N85-06-140 had high general combining abilities. Some crosses had a high specific combining ability indicating the presence of non-additive genetic variation.

Key words

red raspberryroot rotheritabilityparentsprogeny

Copyright information

© Kluwer Academic Publishers 1995

Authors and Affiliations

  • Rolf Nestby
    • 1
  • Nina Heiberg
    • 2
  1. 1.Kvithamar Research StationStjørdalNorway
  2. 2.Ullenswang Research StationHermansverkNorway