油菜粕 飼料化를 위한 有害成分(glucosinolate) 改良育種에 關한 硏究 第2報. 油料用 brassica屬 作物의 登熟中 有害成分 含量變異

Breeding for improvement of glucosinolate content in feed utilizability of rapeseed meal 2. Variation of glucosinolate content during grain filling in brassica species

The major aim of the investigation was to study the variation of glucosinolates content among the Brassica species such as rape, turnip and mustard, during their grain filling Of the three Brassica species, rapeseed meals had the lowest total glucosinolate content. Volatile isothiocyanates in seed meals of three Brassica species were calculated as 3-butenylisothiocyanate and 4-pentenylisothiocyanate. The content of isothiocyanate increased progressively from 30 to 50 days after flowering in all species. 5-vinyl-2-oxazolidinethione content of two Brassica species such as rape and turnip, increased rapidly from 35 days after flowering, after which there was a little change during the remainder of the grain filling period. On the other hand, 5-vinyl-2-oxazolidinethione was not found in the seed meals of mustard. In rape two interest cultivars, Yeongsanyuchae and Bronowski were found which revealed a very low isothiocyanates and 5-vinyl-2-oxazolidinethione contents.