化学杀雄剂对白菜型冬油菜陇油6号的杀雄效果

Effect of chemical hybridizing agents on winter Brassica rapa cv Longyou 6

通过两年大田试验,研究了化学药剂GSC、SX-1和麦极对北方寒区白菜型冬油菜陇油6号的化学杀雄技术。结果表明,不同种类化学杀雄剂对雄蕊的影响不同,SX-1和GSC对陇油6号均有较好的杀雄效果,麦极对雄蕊基本无影响;不同种类杀雄剂的最佳杀雄浓度不同,杀雄时期和方法、单株受药量对杀雄效果也有较大影响,以喷施2次杀雄剂的杀雄效果最佳。SX-1以浓度9.0～10.0mg/L于现蕾期和现蕾后10～12d左右各喷1次、单株受药量分别为3～4mL、5～6mL效果较好,诱导雄性不育株率达到95%;GSC以浓度为0.6mg/L左右、现蕾期和现蕾后10～12d左右各喷1次、单株受药量分别为9～10mL、15～16mL效果较好,诱导雄性不育株率达到98%;当SX-1和GSC的单株受药量分别超过8和20mL时,无论是在植株发育的哪个时期处理,均产生药害现象。

Three chemical agents,GSC,SX-1 and Maiji,were applied in two years to research male sterilization on winter Brassica rapa cv Longyou 6 in northern cold regions.Results indicated that SX-1 and GSC had better inducing effects on stamens than Maiji.Concentrations of the chemical hybridizing agents(CHA),treatment period,spray times and dose had great influences on inducing effects.Tests showed that spraying twice had the best sterilization effect.Double spray of SX-1 using 9.0 to 10.0mg/L with 3 to 4mL and 5 to 6mL per plant respectively at budding stage and 10 to 12 days later,led to more than 95% plants being male sterile.Or,double spray of GSC using 0.6mg/L with 9 to 10mL and 15 to 16mL per plant respectively,resulted in 98% plants being male sterile.When the dose was more than 8mL SX-1 or 20mL GSC per plant,it would damage the plant.