| 摘要: |
| 【目的】探索多效唑及赤霉素在杂交小麦制种生产中的作用。【方法】以小麦温敏不育系“A河10”及其恢复系“389”为材料,采用裂区试验设计,以不用激素处理为对照,研究多效唑(75,90,105,120,135,150 g/hm2)和赤霉素(0,120 g/hm2,喷药液量375 kg/hm2)2种激素配合使用对不育系生长发育、花器性状、异交结实率和制种产量的影响。【结果】与对照相比,用75～150 g/hm2多效唑拌种,能够使成穗数、株头外露率、雌蕊长度和颖壳张开角度分别增加24.88%～66.51%,0.88%～4.57%,2.64%～6.16%,6.93%～14.35%,从而提高异交结实率和制种产量。与未喷施赤霉素相比,喷施赤霉素后,雌蕊长度显著增加,柱头外露率、颖壳张开角度、异交结实率和制种产量均极显著降低。其中以135 g/hm2多效唑拌种、不喷施赤霉素为最佳处理,其异交结实率和制种产量均最高,分别达到35.63%和2 142.0 kg/hm2。【结论】在杂交小麦制种中,可以通过多效唑拌种来优化群体组成及不育系异交特性,增加制种产量,使杂交小麦制种技术更加成熟。 |
| 关键词: 多效唑 赤霉素 小麦温敏不育系 制种产量 |
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| 基金项目:陕西省科技攻关项目 (2007K02-04-01) |
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| Effect of the combined application of MET in seed dressing and spurting GA3 on thermo-sensitive male-sterile wheat line in seed production |
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| Abstract: |
| 【Objective】 The study explored the effect of MET in seed dressing and spurting GA-3 on the hybrid wheat in seed production. 【Method】 Take no hormone treatment as CK,the split plot design was used to study the effect of two kinds of hormones:MET (75,90,105,120,135,150 g/hm2) and GA-3 (0,120 g/hm2,spraying liquid 375 kg/hm2),on plant character,flower character,outcrossing rate and the hybrid seed yield of the male-sterile line by using the material ‘A He 10’,which was the thermo-sensitive male-sterile wheat line,and it's restorer line‘389’.【Result】 Compared with the CK,MET in seed dressing with 75－150 g/hm2could increase the ears 24.88%－66.51%,promote the stigma length 2.64%－6.16%,improve the stigma exsertion rate 0.88%－4.57% and enhance the angle of grain husk 6.93%－14.35%,so did the outcrossing rate and seed production.Compared with no spurting GA-3,spurting GA-3 could promote the stigma length significantly,but reduce the stigma exsertion rate、the angle of grain husk、the outcrossing rate and seed production significantly or extremely significantly.Therefore,MET in seed dressing with 135g/ hm2 and no spurting GA-3 135 g/ hm2 was the best treatment,35.63% in the outcrossing rate and over 2000 kg/hm2 in the hybrid seed production was obtained.【Conclusion】 The hybrid seed production can be perfected,thus raising the hybrid seed yield by MET. |
| Key words: MET GA-3 thermo-sensitive male-sterile wheat line seed production |
