Colloquium Biometricum

Vol: 41 Page: 103

Authors:

Title:
On the dependence of the size of genotype–environment interaction on the number of locations in series of spring barley trials

Language: English

Keywords:

genotype-environment interaction

number of locations

series of trials

Summary:
Inference on the value for cultivation and use (VCU) of new varieties is usually based on results of series of trials performed in different environments (trial stations, locations) over a period of 3–4 years. Similar series are also performed for post–registration investigations. The size of series (number of locations) depends on economic importance of species and varies (in Poland) from a very few trials for less important species to several dozens for the most important ones. There is a permanent economical pressure on reduction of the size of series. In this paper the influence of the number of experiments on the size of genotype–environment interaction is investigated and also the contribution of particular experimental stations (locations) to the genotype–environment interaction is assessed. The results of three year series of 113 trials on spring barley conducted in a period between years 1993 and 1995 at 41 experimental stations form a basis for investigations.