【摘要】 研究化杀剂SX-1对甘蓝型油菜品种制种双亲的影响,探讨规范科学标准化的油菜化杀杂交制种技术。油菜母本苔高20cm左右,80%植株最大花蕾达到2mm,花粉发育在单核期到单核靠边期第一次喷施5.5mg/L的SX-1,7~10天后第二次喷施6.5mg/L,每次每株着药量2.5mL左右。SX-1对两油菜品种母本的育性影响一致,杀雄彻底,雄性不育株率可达99%以上,自交不结实,异交授粉结实正常,植株没有明显药害,而部分器官形态和农艺性状则呈现显著性变化,如株高、有效分枝部位降低,主花序变短,花蕾、萼片和花瓣变小,花丝缩短,重量减轻,雌蕊伸长,重量增加等,结实上角果数、千粒重增加,每角粒数减少,制种产量仅比对照减产9.07%和15.27%;而对两父本的相关性状和结实没有影响或影响不显著。SX-1是一种高效油菜化学杂交剂,用于大面积制种是安全和可行的。更多还原

【Abstract】 This study aimed to reveal the influence of CHA SX-1 to parents , traits in Brassica napus.L, and explore the standardized scientific method of using CHA SX-1 in hybrids production in B. napus L. the two tested varieties of B. napus in the field was sprayed SX-1 with 5.5 mg/L on leaves for the first time , when the height of female parent stem was about 20 cm, and the biggest bud of 80% plants reached to about 2 mm, and pollen development was in uninucleate stage to the late uninucleate stage. After 7 days to 10 days, SX-1 with 6.5 mg/L was sprayed for the second time with 2.5 mL per plant. After spraying SX-1, sterility of the two female parents was completely, and the sterility rate reached to 99%, and self-cross of the two female parents could not obtain seeds, but outcrossing might set seeds normally, and plants did not show obvious phytotoxicity. However, parts of organ morphology and agronomic traits changed significantly. For example, plant height of female parents and effective branch position lowered, and main inflorescences shortened, buds, sepals and petals became smaller, filaments shortened and its weight lightened, and pistil elongated and its weight increased, and pods and 1000-seeds weight increased, seeds per silique reduced, but the yield of hybrids production just reduced 9.07% and 15.27% than CK, and correlated traits and yield traits of the two male parents did not been influenced significantly. SX-1 was a kind of efficient CHA for rape, and it was also safe and feasible in hybrids production of B. napus L.更多还原