Diversity of Nordic horseradish

A Swedish PhD thesis concludes that there is large variation in the properties of horseradish found in plant collections in the Nordic countries (old naturalised and garden accessions). The diversity is large both in chemical content, form and appearance and DNA. This is somewhat surprising for a vegetatively propagated plant!

http://www.skogoglandskap.no/nyheter/2015/stor_genetisk_variasjon_i_nordisk_pepperrot

English thesis summary
http://pub.epsilon.slu.se/11629/