近几年来我所引进国内外一批甘兰型油菜进行试种,并在各县进行试验,甘兰型油菜推广面积逐年扩大。 1975年发现甘兰型油菜盛花期出现植株徒长,分枝多,开花多,结角少,或植株矮化,节茎丛生,叶片变厚,根部膨大呈瘤状,角果不发育的症状;有的植株外部形态虽正常,但角果少而 In recent years, I have introduced a number of Brassica napus at home and abroad for trial planting and experimentation in all counties. The promotion area of ​​Brassica napus has been expanding year by year. In 1975, it was found that in the flowering stage of Brassica napus, the plants were lengthened, with many branches, more flowers, fewer knots or dwarf plants, the stems and stems grew thick, the leaves became thick, Although some plant external morphology is normal, but fewer fruit