| 干旱条件下我国不同年代玉米品种保绿性比较 |
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| 引用本文： | 孙琦,张世煌,慈晓科,张德贵,李新海,郝转芳,翁建峰,白丽,李明顺.干旱条件下我国不同年代玉米品种保绿性比较[J].玉米科学,2013,21(2):71-77. |
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| 作者姓名： | 孙琦 张世煌 慈晓科 张德贵 李新海 郝转芳 翁建峰 白丽 李明顺 |
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| 作者单位： | 中国农业科学院作物科学研究所, 北京 100081;山东省农业科学院玉米研究所, 济南 250100;中国农业科学院作物科学研究所, 北京 100081;中国农业科学院作物科学研究所, 北京 100081;中国农业科学院作物科学研究所, 北京 100081;中国农业科学院作物科学研究所, 北京 100081;中国农业科学院作物科学研究所, 北京 100081;中国农业科学院作物科学研究所, 北京 100081;中国农业科学院作物科学研究所, 北京 100081;中国农业科学院作物科学研究所, 北京 100081 |
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| 基金项目： | 国家现代农业产业技术体系专项资金(CARS-02-01);中央级公益性科研院所基本科研业务费专项资金(20102) |
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| 摘 要： | 选用35个玉米品种(农家种4个, 双交种4个, 单交种27个), 在海南三亚设置正常浇水和花期干旱两个处理, 鉴定每个品种在干旱环境下的保绿性, 比较不同年代品种的持绿性。结果发现, 干旱导致玉米叶片叶绿素含量下降, 衰老启动时间提前, 干旱条件下品种的衰老启动时间、最大衰老速度出现时间均随年代更替而延后, 最大衰老速度均随着年代更替而下降, 即玉米的保绿性均随着年代更替而提高, 与正常浇水条件下的趋势相似。玉米保绿性与叶绿素含量均与产量呈显著相关;在干旱处理条件下, 品种保绿性均随年代更替而提高, 我国的玉米育种中已经对持绿性进行了改良, 耐旱性也得到提高。
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| 关 键 词： | 玉米 保绿性 干旱胁迫 |
| 收稿时间： | 4/1/2012 12:00:00 AM |
Comparison of Leaf Stay-Green Trait Chinese Different Era Maize Cultivars in Drought Environment |
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| SUN Qi,ZHANG Shi-huang,LI Xin-hai and LI Ming-shun.Comparison of Leaf Stay-Green Trait Chinese Different Era Maize Cultivars in Drought Environment[J].Journal of Maize Sciences,2013,21(2):71-77. |
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| Authors: | SUN Qi ZHANG Shi-huang LI Xin-hai and LI Ming-shun |
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| Institution: | Institute of Crop Sciences, Chinese Academy of Agricultural Sciences, Beijing 100081;Maize Institute, Shandong Academy of Agricultural Sciences, Jinan 250100, China;Institute of Crop Sciences, Chinese Academy of Agricultural Sciences, Beijing 100081;Institute of Crop Sciences, Chinese Academy of Agricultural Sciences, Beijing 100081;Institute of Crop Sciences, Chinese Academy of Agricultural Sciences, Beijing 100081;Institute of Crop Sciences, Chinese Academy of Agricultural Sciences, Beijing 100081;Institute of Crop Sciences, Chinese Academy of Agricultural Sciences, Beijing 100081;Institute of Crop Sciences, Chinese Academy of Agricultural Sciences, Beijing 100081;Institute of Crop Sciences, Chinese Academy of Agricultural Sciences, Beijing 100081;Institute of Crop Sciences, Chinese Academy of Agricultural Sciences, Beijing 100081 |
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| Abstract: | Thirty-five era cultivars were selected including four OPVs, four double hybrids and twenty-seven single hybrids. They were given two treatments comprised full irrigation and water stress in flowering stage in Sanya of Hainan province. Stay-green parameters of every cultivar were calculated. Then stay-green of each decade was compared. The results indicated that drought induced chlorophyll content decreasing and time of senescence start-up(Ts) occurring earlier. Under water-stress, the Ts, Time of maximal senescence velocity(Tmax) postponed s and velocity of maximal senescence(Vmax) declined with decades. That is to say, stay-green traits increased with decades under drought stress environments, just like full irrigation. Significant correlation existed between stay-green parameters and grain yield. Therefore, stay-green traits of maize cultivars were improved in breeding and their drought tolerances were also increased. |
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| Keywords: | Maize Stay-green trait drought stress |
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