| 孙丰磊,张玻,曲延英,陈全家,高文伟.花铃期干旱胁迫对不同棉花品种光合特性影响及抗旱性评价[J].干旱地区农业研究,2018,36(5):7~13 |
| 花铃期干旱胁迫对不同棉花品种光合特性影响及抗旱性评价 |
| Effects of drought stress during the blooming period on photosynthetic characteristics and assessment drought resistance of different cotton varieties |
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| DOI：10.7606/j.issn.1000-7601.2018.05.02 |
| 中文关键词: 干旱 棉花品种 光合特性 主成分分析 抗旱性评价 |
| 英文关键词:drought cotton variety photosynthetic characteristic vprincipal components analysis drought resistance evaluation |
| 基金项目:南京农大-新农大联合基金（KYYJ201601）;国家重点研发计划（2016YFC0501407）;新疆农业大学博士后流动站资助项目 |
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| 中文摘要: |
| 以28份抗旱性不同的棉花品种为材料，通过大田花铃期水分胁迫，以抗旱系数和主成分分析综合评价各个棉花品种的抗旱水平，并对其评价和等级进行划分。结果表明，各个棉花品种在花铃期干旱胁迫下，各指标反应程度不同，其中叶绿素、净光合速率、水蒸汽压亏缺、气孔导度变化较明显，通过RI值聚类分析，将材料分成4个大类，第Ⅰ类为高抗型品种有C1470、ND359-5、新炮1号、新陆中39等18份品种；第Ⅱ类为中抗型的包括天合995、吉扎81、大铃棉、TM-1、10615-1、塔什干7号；第Ⅲ类为敏感型的包括新陆早1号、新石K7、鲁棉28；第Ⅳ为极敏感型的新陆早26。进一步利用逐步回归建立回归方程D=-1.496+0.775Ci+0.160Gs-0.020VPD+0.719Pn+0.799Tr-0.241WUE+0.663Chl（R2=0.996），筛选出7个指标，分别为Ci、 Gs、VPD、A、Tr、WUE、Chl，各材料估计精度大于97.55%。 |
| 英文摘要: |
| Field water stress during the blooming period was conducted to assess drought resistant capacity and partition clahierarchy of 28 varieties of cotton by drought resistance coefficient.The results showed that cotton varieties under drought stress during the blooming period, indexes responded variously.Chlorophyll, net photosynthetic rate, stomatal conductance, water vapor pressure deficit changed more apparently.The material could be divided into four major categories, by RI value clustering analysis. The first (Ⅰ) type for high class type varieties were C1470, ND359-5, Xinpao 1, Xinluzhong 39 in 18 varieties. The second (Ⅱ) class for the type of resistance included Tianhe 995,Jizha 81,Dalingmian,TM-1, Tashigan 7. The third (Ⅲ) for sensitive was Xinluzao 1, Xinshi K7, Lumian 28. The fourth (Ⅳ) for highly sensitive was Xinluzao 26 earlier,The mathematical evaluation model was established as D=-1.496+0.775Ci+0.160Gs-0.020VPD+0.719Pn+0.799Tr- 0.241WUE+0.663Chl（R2=0.996）,and the evaluation accuracy of the equation was higher than 97.55%. Seven indexes closely related to the chilling tolerance, Ci、 Gs、VPD、A、Tr、WUE and Chl. |
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