| 摘要: |
| 【目的】分析吉林省4个主推的具有不同杂种优势模式的玉米品种和4个自选品种的耐密性。【方法】在3.0，4.5，6.0，7.5，9.0，11.0和13.0万株/hm2密度下，选用吉林省玉米生产中的主推品种先玉335、郑单958、农华101、利民33和组配的JNY688、JNY988、JNY558、JNY355为试验材料，采用裂区试验，以密度为主区、品种为副区，研究不同杂交模式下玉米杂交种的耐密性。【结果】4个主推品种耐密性顺序为利民33＞郑单958＞农华101＞先玉335；4个改良品种的耐密性顺序为JNY355＞JNY668＞JNY988＞JNY558；不同杂交模式的耐密性顺序为改良Reid×外杂选＞改良Reid×塘四平头＞改良Reid×Lancaster＞美杂选×旅大红骨模式。【结论】JNY355、JNY668和JNY988是改良比较成功的杂交种，JNY558具有耐密植潜力，但仍需继续改良。 |
| 关键词: 玉米 杂交模式 种植密度 |
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| 基金项目:国家“863”项目(2011AA10A103)；国家科技计划项目(2011BAD35B01)；农业部“948”项目(2011-G1-21) |
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| Density-tolerance of mainly popularized maize varieties with different heterotic patterns in Jilin Province |
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JIANG Long,ZHANG Ye,LI Ji-zhu,et al
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| Abstract: |
| 【Objective】Density-tolerances of four mainly popularized maize varieties in Jilin Province and four customized varieties with different planting densities were studied.【Method】Mainly popularized maize varieties (XY335,ZD958,NH101,and LM33) in Jilin Province and four hybrids (JNY688,JNY988,and JNY558,JNY335) were planted with different densities (3.0,4.5,6.0,7.5,9.0,11.0,and 13.0）×104 plants/hm2).The split-plot experimental design was used.Density-based districts were treated as main districts,and variety-based districts were treated as deputy districts to study the density tolerance with different heterotic patterns.【Result】The density-tolerances of mainly popularized varieties were in a decreasing order of LM33>ZD958>NH101>XY335,while that of customized varieties were in a decreasing order of JNY355＞JNY668＞JNY988＞JNY558.The density-tolerances of different heterotic patterns were in a decreasing order of Improved Reid×Abroad hybrid＞Improved Reid×Tang4pingtou＞Improved Reid×Lancaster＞the USA-hybrid×Luda Red Cob.【Conclusion】JNY355,JNY668 and JNY988 were successfully improved hybrids,and JNY558 had high density-tolerance potential.However,improvement is still needed. |
| Key words: maize heterotic pattern planting density |
