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Delete unwanted variables

 

When the barley mapping data is displayed in a biplot, it looks like:

 

 

Note that it is based on tester-standard deviation standardized data so that the units of the traits are removed.

 

Suppose one wants to identify QTL for kernel weight (KW):

 

 

 

 

 

In depth: Why double-haploid "31" stands out from other double-haploids because this genotype has a value of '0'  for all markers on chromosome 6, which are located on the other side of the biplot origin.