| 孙丰磊,曲延英,陈全家,高文伟.棉花抗旱相关指标综合评价及灰色关联分析[J].干旱地区农业研究,2019,37(1):233~239 |
| 棉花抗旱相关指标综合评价及灰色关联分析 |
| Comprehensive evaluation of cotton drought tolerance indexes and gray relational analysis |
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| DOI：10.7606/j.issn.1000-7601.2019.01.33 |
| 中文关键词: 棉花 农艺性状 抗旱性综合评价 灰色关联度分析 |
| 英文关键词:cotton agronomic indexes comprehensive drought resistance evaluation gray relational analysis |
| 基金项目:国家重点研发计划（2016YFC0501407）；南京农大-新农大联合基金（KYYJ201601）；新疆农业大学博士后流动站资助 |
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| 中文摘要: |
| 以30份棉花资源为材料，在大田对棉花花铃期进行干旱胁迫，于胁迫第10天测定光合指标，并分别取样测定叶片丙二醛（MDA）、叶绿素（Chl a+b）、超氧化物歧化酶（SOD）、脯氨酸（Pro）等的变化，吐絮后测定农艺性状；同时采用抗旱系数、抗旱指数、灰色关联分析等相结合的方法，对棉花的抗旱性进行综合评价。根据抗旱性度量值（D值）聚类分析结果，将30份材料聚类为4个类型，高抗旱型品种有贝尔斯诺、川98、库克C310-5100、KK1543、中R2015；中等抗旱型品种有新陆早49、新陆中8号、中R773-1等13个品种；抗旱型品种有新陆早47、辽18、富依德998等8个品种；干旱敏感型品种有军棉1号、中R2009、新陆早26、新陆中58。通过灰色关联分析，16个指标与D值的紧密程度依次为有效铃数、总铃数、有效果枝数、Gs、Tr、果枝数、MDA、叶绿素总量、Pn、叶绿素b、株高、WUE、叶绿素a、Pro、Ci、SOD。在受到干旱胁迫时，棉花农艺性状表型指标敏感，同时MDA、叶绿素总量这2个指标反应较其它生理生化指标敏感，蒸腾速率（Tr）、气孔导度（Gs）、净光合速率（Pn）相对其它光合指标较敏感。 |
| 英文摘要: |
| By conducting field water stress on 30 cotton varieties during the flowering and boll stages, we determined photosynthesis indexes in the 10th of stress and took samples to determine malondialdehyde (MDA), chlorophyll (a,b,a+b), superoxide dismutase (SOD), proline (Pro), and the major agronomic indexes. The drought tolerance of cotton was comprehensively evaluated by combining drought-tolerance indexes, drought tolerance coefficient, and grey correlation analysis. According to drought tolerance metric (D value), the 30 tested varieties were categorized as 4 groups including high drought tolerance (Beiersinuo, Chuan 98, Kuke C310-5100, KK 1543, Zhong R2015), moderate drought-tolerance (13 varieties including Xinluzao 49, Xinluzhong 8, and Zhong R773-1), low drought-tolerance (8 varieties including Xinluzao 47, Liao 18, and Fuyide 998), and sensitive drought-tolerance (Junmian1, Zhong R2009, Xinluzao 26, and Xinluzhong 58). Through the gray relational analysis of 16 indexes and D values, correlation of the indexes to the D values were ranked as effective number of bolls>total number of bolls>effective number of boll branches >Gs>Tr> number of boll branches>MDA>total chlorophyll>Pn>chlorophyll b>plant height>WUE>chlorophyll a>Pro>Ci>SOD. Under drought stress, the cotton agronomic phenotypic indexes were very sensitive. Meanwhile, MDA and total chlorophyll both were more sensitive than other physiological and biochemical indicators and transpiration rate (Tr), stomatal conductance (Gs), and net photosynthetic rate (Pn) were more sensitive than other photosynthetic index. According to the comprehensive drought resistance index, cluster analysis, gray correlation and soon, we comprehensively evaluated the drought resistance of 30 materials. |
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