图2. 简化油菜杂交种制种：父母本制种示意图
A：类型1母本,生产上广泛使用的全不育系。可在现蕾初期喷施含苯磺隆的化学诱导雄性不育剂,将杂株杀雄,提高制种纯度。B：类型2母本,育性有分离或不稳定的不育系统;C：类型3母本,常规自交系和常规品种

Fig.2. A simplified production method of hybrid F₁ seed in rapeseed: Production procedure of parental lines
A: Type1 female lines, widely used full male sterile lines in production. Tribenuron-methyl can be used as the male sterility induction agent to make male-fertile plants sterility and increase seed purity; B: Type2 female lines, Fertility segregated or instable male sterile lines; C: Type3 female lines, Conventional inbred lines and varieties