油菜是靠蜜蜂,风力等媒介传粉的异花授粉作物,异交率高达90%以上,如果不建立良种隔离繁殖基地和注意田间选留种工作,就会发生种性退化,品种混杂现象,使良种逐渐转化为劣种,往往会造成产量比良种减产一成,质量降低一等的后果。因此,建立油菜良种的隔离繁殖基地,并根据油菜的特性进行开花期、成熟期,采用株选留种、主轴留种、整枝留种的科学留种方法,是避免种子退化变劣,保证优良种性的重要措施。 1.株选留种。这一选种方法是于油菜开花期间,在同一优良品种 Rape is a cross-pollination cross pollination by bees, wind and other media pollination crops, outgrowth rate as high as 90% or more, if you do not establish a breeding base for breeding and pay attention to field selection work, there will be species degradation, mixed species, so that The gradual transformation of the elite seeds into inferior ones often results in a yield reduction of 10% of the yield of the elite species and the consequent reduction in quality. Therefore, the establishment of rapeseed breeding base isolation, and according to the characteristics of rapeseed flowering, maturity, the use of selected species of plant species, the main species of spawning, pruning species to stay species of science is to avoid deterioration of seed deterioration, to ensure good An important measure of sex. 1. strains selected species. This selection method is in rape during flowering, in the same fine varieties