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近年来,育种家们把克服优质所带来的油菜产量降低的希望主要寄托在杂种优势的利用上。目前,油菜杂种优势利用的主要途径是细胞质雄性不育和细胞核雄性不育。核不育两系因大田制种要拔掉50%的可育株,使其利用受到一定的限制。 我校从1982年开始了油菜细胞质雄性不育“三系”的研究与利用,杂交品系华杂2号已开始在生产上试种示范。但是,油菜细胞质雄性不育“三系”的育种程序复杂,育种周期较长,雄性不育系的繁殖成本较高,同时,象nap、波里玛和陕2A细胞质雄性不育存在着育性不稳定现象,即雄性不育在不同的条件下育性会发生变化(杨光圣、
In recent years, breeders have pinned their hopes of reducing the yield of rapeseed brought about by superior quality in the utilization of heterosis. At present, the main ways of rape heterosis utilization are cytoplasmic male sterility and nuclear male sterility. Two lines of nuclear sterile due to field seed to unplug 50% of fertile plants, its use is subject to certain restrictions. Our school from 1982 began rapeseed cytoplasmic male sterility “three lines” of research and utilization, hybrid hybrid huatang 2 has begun to test in the production of demonstration. However, the breeding program of “three lines” of rape cytoplasmic male sterility is complicated, the breeding cycle is longer, the breeding cost of male sterile lines is higher, and the fertility of cytoplasmic male sterility like nap, Instability, ie male sterility changes under different conditions fertility (Yang Guangsheng,