Contents - Index
Genotype-by-trait table in an environment
See this page for interpreting a genotype-by-trait biplot.
Comparing genotype by trait biplots in contrasting environments may reveal important information on the genotype by environment interactions in the data.
The following example is based on the 2003 Eastern Canada Spring Oat Trials data.
Comparing the genotype by trait biplot in Woodstock NS
with that in Hebertville QC
reveals that plant height may be responsible for the observed genotype by environment interaction for oat yield, because it had contrasting effects on yield in the two environments.
Covariate-effect biplot analysis is a more systematic approach for identifying explanatory traits that can explain the observed genotype-by-environment interactions regarding a trait of interest.