492A是由常德市农科所和亚华种业科学院用甘蓝型油菜不育系D6A、保持系D6B和新品系224—2作亲本分别进行杂交、回交转育而成的优质甘蓝型油菜胞质不育系。2001年2月通过湖南省农作物品种审定委员会审定。该品种不育株率100％,不育度95％以上,异交结实性较好。芥酸含量0.4％,硫代葡萄糖苷含量21.97微摩尔/克饼。生育期适中,适合配制中熟或中早熟组合。 栽培要点是:繁殖制种区与外界严格隔离,1000米内不得种植其它油菜及白菜、萝卜 492A is a high quality Brassica napus cell derived from the male sterile line D6A, the maintainer line D6B and the new line 224-2 of Changde Agricultural Science Institute and Yahua Seed Science Academy, respectively. CMS February 2001 through the Hunan Provincial Crop Variety Approval Committee. The varieties of sterile plants rate of 100%, sterility more than 95%, better outcrossing. Erucic acid content of 0.4%, glucosinolate content of 21.97 micromol / 克 cakes. Moderate growth period, suitable for the preparation of cooked or middle-aged combination. The main points of cultivation are: Strict isolation of breeding areas and the outside world, not to plant other rape and cabbage within 1000 meters, radishes