In this study，the glucosinolate（GS）component and content in flower stalk and bud from 30
rapeseed varieties were measured by ultra-high performance liquid chromatography（UPLC）．The results showed
that there were bigger variation ranges in the total glucosinolates contents of these 30 rapeseed varieties，between
21.67-119.29 μmol·g^-1．The glucosinolate contents in bud were mostly higher than that in flowering stalk．The
average glucosinolate content in bud was 37.26 μmol·g^-1，while that in flowering stalk was 28.06 μmol·g^-1．
The glucosinolate components in bud and flowering stalk were similar，all took 4-pentenyl glucosinolate and
2-hydroxy-3-butenyl glucosinolate as their basis．Their contents in bud and flowering stalk accounted for
46.24%，28.52% and 45.19%，29.13% of the total glucosinolates contents，respectively．Further analysis
was conducted in the glucosinolate components and contents of rapeseed varieties with high，medium and low
glucosinolate contents．The results showed that the differences in glucosinolate contents were mainly caused by
4-pentenyl glucosinolate．