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The relative performance of an entry relative to individual testers
From Biplot Tools, click Examine an Entry, an entry selection pane will appear above the biplot.
Click the Tester button, it will be changed to Entry, and the drop-down box will be filled with entries.
Click the drop-down arrow by the textbox to select the entry (genotype) to be examined and click the button Rank. The biplot will be changed to the following:
The following will appear on the biplot:
o A frame around selected entry (entry1, this case), with all other entries represented by "o" (or other symbols);
o A red line passing through the biplot origin and the selected entry, which is referred to as "Entry1 axis",
o A red arrow pointing to the selected entry from the biplot origin,
o A blue line passing through the biplot origin and perpendicular to the red line, and
o Based on the relative performance of the selected entry, the testers are ranked along the Entry1 axis, with the arrow pointing to a better relative adaptation of Entry1:
Test7 > Test5 > Test2 > Test3 > Test1 >= Test4 >= Test9 > Test6 >= Test8.
o The blue line separates testers in which Entry1 had above-average values from those in the entry1 had below-average values:
Test7 > Test5 > Test2 > average > Test3 > Test1 >= Test4 >= Test9 > Test6 >= Test8. So Entry1 is most adapted to Test7, Test5, and Test2, but is not well adpated to the other testers.
Note: The distance between a tester and the Entry1 axis has no meaning (but compare with the mean vs. stability of entries view).
Caution: if the vector of the genotype is short (i.e., when the genotype is positioned close to the biplot origin), relative to the biplot dimension, this interpretation may not be meaningful or accurate, because this genotype tends to have similar relative performances in all environments.