No direct and simple relationship between chemical composition,
instrumentally measured colour and sensory evaluated colour
of Jerusalem artichoke tubers could be established. Discolouration
was expressed as enzymatic browning of raw tubers and aftercooking
darkening of boiled tubers. The investigated chemical
parameters were not sufficient to describe the processes occurring
in Jerusalem artichoke tubers during the discolouration. No differences
in sensory-evaluated enzymatic browning of raw tubers
were found, but Rema was identified to have a higher association
to browning by multivariate data analysis. Mari was the variety
with the least amount of after-cooking darkening. It can therefore
be recommended that Mari or Draga are chosen for raw consumption,
and if the tubers are to be boiled, Mari should be chosen.