Measuring late blight attack of potato foliage in field trials: optimal resource allocation in assessment trials

Authors

  • Bernd Truberg Julius Kühn Institute, Federal Research Centre for Cultivated Plants, Institute for Breeding Research on Agricultural Crops, Quedlinburg, Germany; since 2010 NORIKA Nordring-Kartoffelzucht- und Vermehrungs-GmbH, Gross Lüsewitz Sanitz, Germany
  • Thilo Hammann Julius Kühn Institute, Federal Research Centre for Cultivated Plants, Institute for Breeding Research on Agricultural Crops, Quedlinburg, Germany
  • Ulrich Darsow Julius Kühn Institute, Federal Research Centre for Cultivated Plants, Institute for Breeding Research on Agricultural Crops, Quedlinburg, Germany
  • Hans-Peter Piepho University of Hohenheim, Department of Crop Production and Grassland Research (340), Bioinformatics (340c), Stuttgart, Germany

Keywords:

Solanum tuberosum, Phytophthora infestans, AUDPC, field trial, variance components

Abstract

An empirical data set was analysed in order to give recommendations on the optimal resource allocation in a field testing system to measure late blight attack in potato. The data set was derived from an experiment comprising 854 genotypes, three years, two replicates per year, and 16 to 18 scoring dates per year. AUDPC (area under disease progress curve) values were calcu­lated based on percentage of attacked haulm. Artificial inoculation was used to establish late blight in the testing field. Three testing years, two replicates per year, and three scoring dates per year are recommended to be sufficient. The results are based on the assumption, that the quality of data is independent of the frequency of data collection. This assumption is critically discussed.

DOI: 10.5073/JfK.2010.04.02, https://doi.org/10.5073/JfK.2010.04.02

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Published

2010-04-01

Issue

Vol. 62 No. 4 (2010)

Section

Original Article