低芥酸油菜在繁育过程中,要求严防生物学混杂和机械混杂,保证原种芥酸含量不得超过0.5%,良种(生产用种)不得超过1.5%,大田油菜(商品油菜)不超过5%。同时,在保证品质的前提下不断提高其优良特性。为此,将低芥酸油菜良种繁育和商品生产的防杂保纯的有关问题综述如下。 一、不同地形,不同隔离距离对油菜芥酸含量的影响 1.平原地区低芥酸油菜与高芥酸油菜品种间隔的距离 据报道,甘蓝型油菜之间、甘蓝型油菜与结球白之间都能串花杂交,前者自然异交率随着距离的愈近愈高,甘蓝型油菜相距109米,自然异交率为4.5%相距36米时为7.2%,相距1.8米时高达19.5%。有人曾将甘蓝型油菜的两个不同品种相邻种植,其中内侧相邻枝间杂交率达15.2％,外两侧相邻枝之间杂交率为10%以下。侯国佐曾将低芥酸油菜与高芥酸油菜在不同的距离内进行试验结果表明,品种间隔30米以内的3个点芥酸含量比原供试品种提高1.567—8.187%,平均提高5.787%;间隔250— Low erucic acid rape in the breeding process, the need to prevent biological hybrid and mechanical hybrid to ensure that the original species of erucic acid content of not more than 0.5%, good seed (production of species) shall not exceed 1.5%, field Rape (rape) no more than 5% . At the same time, under the premise of ensuring the quality of its excellent features continue to improve. To this end, the low erucic acid rapeseed breeding and commodity production of anti-hybrid purity related issues are summarized below. First, the different terrain, different isolation distance on the erucic acid content of rape 1. Low erucic acid plain rapeseed and high erucic acid rapeseed spacing distance reported that between the Brassica napus, Brassica napus and the ball between the white The crossbreeding rate of the former is as high as the distance, the rapeseed is 109 meters apart, the natural rate of outcrossing is 4.5%, 7.2% when it is 36 meters, and 19.5% when the distance is 1.8 meters. Two different varieties of rapeseed have been planted adjacent to each other, in which the rate of cross between adjacent branches is 15.2%, and the rate of cross between adjacent branches on both sides is less than 10%. Hou Guozuo had low erucic acid rape and high erucic acid at different distances to the test results show that the species within 30 meters interval 3 points erucic acid content than the original test increased 1.567-8.187%, an average increase of 5.787%; Interval 250-