| 摘要: |
| 【目的】研究化学杂交剂SX-1对甘肃春油菜区不同生态类型甘蓝型油菜（春性15份、半冬性20份、冬性7份）的雄性不育诱导效果和生育期的影响，为化学杂交剂SX-1在该区域的有效利用提供科学依据。【方法】以不同生态类型的42份甘蓝型油菜为材料，在最大花蕾长度达2.0～2.5 mm时,分别以6.5 mg/L SX-1进行处理，间隔10～15 d以7.0 mg/L SX-1再喷第2次，第1次喷药4 d后，每隔2 d对植株生长发育和育性情况观察记载1次，直至终花。【结果】SX-1对参试的42份材料都有一定的杀雄作用，对SX-1的反应敏感程度表现为迟钝、略微敏感、敏感、特别敏感4种类型，分别占材料总数的4.76%，21.43%，61.91%，11.90%。略微敏感、敏感、特别敏感3种类型的材料全不育株率达到96%以上，占材料总数的95.2%。不同生态类型油菜不育持续时间19～31 d，初花期推迟1.9～2 d，花期延长3.4～3.8 d，全生育期增加3～5 d。【结论】SX-1对春油菜区不同生态类型甘蓝型油菜都有较好的杀雄效果，在油菜育种中具有重要的应用价值，可以在该区域油菜的育种和制种中大面积推广应用。 |
| 关键词: 化学杂交剂SX-1 生态类型 甘蓝型油菜 杀雄效果 春油菜区 |
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| 基金项目:陕西省自然科学基础研究计划项目（2013JZ005）；陕西省农业科技创新与攻关项目（2015NY096）；陕西省科技统筹创新工程计划项目（2014KTCQ02-01，2015KTCQ02-20）；陕西杨凌示范区科技计划项目（2014NY-24，2015NY-17） |
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| Gametocidal and growth period effects of chemical hybridizing agent SX-1 on different ecological types of Brassica napus in spring rape area |
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WEI Shihao,LI Yonghong,TIAN Jianhua,et al
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| Abstract: |
| 【Objective】The gametocidal and growth period effects of chemical hybridizing agent SX-1 on different ecological rapeseeds (15 spring rapeseeds,20 semi-winter rapeseeds,and 7 winter rapeseeds) in spring rape area of Gansu were studied to provide scientific basis for efficient application of SX-1.【Method】A total of 42 Brassica napus from different ecological types were treated with SX-1 at mass concentration of 6.5 mg/L when the length of maximum bud reached 2.0-2.5 mm.After 10-15 days,the rapes were treated with SX-1 at mass concentration of 7.0 mg/L for the second time.The development and fertility changes of rape were observed and recorded every two days from the fourth days of first spraying to demise of flowers.【Result】SX-1 had gametocidal effects to all 42 tested rapeseeds.Based on the sensitivity to SX-1,the rapeseeds were grouped to insensitivity,slightly sensitivity,sensitivity and hypersensitivity.The ratios of the four types were 4.76%,21.43%,61.91%,and 11.90%,respectively.The types of lightly sensitivity,sensitivity and hypersensitivity were complete male sterility with the total ratio of 95.2% and the sterile stages lasted for 19-31 days.The bloom stages were delayed by 1.9-2 days,flowering stages were delayed by 3.4-3.8 days,and the whole growth stages were increased by 3-5 days.【Conclusion】SX-1 had good gametocidal effect on different ecological types of Brassica napus.It had important applications in rape breeding,and can be used in large scale in spring rape area. |
| Key words: chemical hybridizing agent SX-1 ecological types Brassica napus gametocidal effect spring rape area |
