The Difference of Glucosinolate Content in Different Cultivar of Daikon Roots

Raphanus sativus L.

Abstract

In order to elucidate the varietal difference in contents of total g1ucosinolate and 4-methylthio-3-butenyl glucosinolate (MTB-GSL) of daikon (Japanese radish) roots, 20 cultivars sown in late summer at open field for two years were subjected to analyses. The contents were determined by a col-orimetric or gas-liquid chromatographic method. The range and mean of MTB-GSL contents was 42 to 345μmo1/100g of fresh weight and 210μmol/100g of fresh weight, respectively. A coefficient of variance of the estimated values was 39%. Among the cultivars examined, the highest in total glucosinolate content contained 2.3 times higher than the lowest. The mean content of MTB-GSL was corresponded to about 80% of that of total glucosinolate. The MTB-GSL contents in 13 cultivars harvested in two different years were positively correlated between them.