| 模拟干旱条件下冬小麦品种萌发期抗旱性评价 |
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| 引用本文： | 孙绿,李玉刚,王圣健,刘亚东,王志英,刘丹,李娜娜,赵长星,盖红梅.模拟干旱条件下冬小麦品种萌发期抗旱性评价[J].干旱地区农业研究,2017,35(6):109-115. |
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| 作者姓名： | 孙绿 李玉刚 王圣健 刘亚东 王志英 刘丹 李娜娜 赵长星 盖红梅 |
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| 作者单位： | 青岛农业大学农学与植物保护学院，山东省旱作农业技术重点实验室， 山东 青岛 266109；青岛市农业科学研究院， 山东 青岛 266100;山东省农作物种质资源中心， 山东 济南 250100 |
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| 基金项目： | 国家自然科学青年基金(31301320)；国家科技支撑计划项目(2011BAD09B01-2)；山东省农业科学院青年科研基金(2014QNM09)；国家重点研发计划(2016YFD0300400，2016YFD0100302) |
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| 摘 要： | 为了筛选适于华北旱作区种植的优良冬小麦品种,采用PEG-6000模拟干旱环境,评价了119份小麦品种的萌发期抗旱性,并通过加权隶属函数法对供试材料的抗旱性进行综合评价。研究结果表明,供试材料的5个性状均值,处理比对照分别下降了77.3%,40.0%,30.7%,16.7%和78.0%,不同品种间差异明显。19.6%的PEG-6000处理促进了部分材料的主胚根长伸长,包括洛夫林13、汶农14、轮选987等24份材料,这部分种质可能为萌发期对干旱响应比较积极的品种。隶属函数法计算综合评价值(D值)结果表明,其与胚芽鞘长、主根数等各指标抗旱系数的隶属函数值均呈极显著正相关。UPGMA聚类分析可以将试验材料在遗传距离为0.82处供试材料分为两大类。初步筛选出的小麦萌发期抗旱较强的种质为:洛夫林13、汶农14、中国春、漯麦8号、轮选987、泰山22、山农17、泰农18、烟航选2号、中育6号、鲁麦14、泰农6258、泰农2987。
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| 关 键 词： | 小麦 萌发期 抗旱性 胚芽鞘长 隶属函数法 聚类分析 |
Evaluation of drought resistance of winter wheat under drought stress simulation at germination stage |
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| SUN Lv,LI Yu-gang,WANG Sheng-jian,LIU Ya-dong,WANG Zhi-ying,LIU Dan,LI Na-n,ZHAO Chang-xing,GE Hong-mei.Evaluation of drought resistance of winter wheat under drought stress simulation at germination stage[J].Agricultural Research in the Arid Areas,2017,35(6):109-115. |
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| Authors: | SUN Lv LI Yu-gang WANG Sheng-jian LIU Ya-dong WANG Zhi-ying LIU Dan LI Na-n ZHAO Chang-xing GE Hong-mei |
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| Institution: | College of Agronomy and Plant Protection, Qingdao Agricultural University, Shandong Provincal Key Laboratory of Dryland Farming Techniques, Qingdao, Shandong 266109, China; Qingdao Academy of Agricultural Sciences, Qingdao, Shandong 266100, China,Qingdao Academy of Agricultural Sciences, Qingdao, Shandong 266100, China,Qingdao Academy of Agricultural Sciences, Qingdao, Shandong 266100, China,College of Agronomy and Plant Protection, Qingdao Agricultural University, Shandong Provincal Key Laboratory of Dryland Farming Techniques, Qingdao, Shandong 266109, China,Qingdao Academy of Agricultural Sciences, Qingdao, Shandong 266100, China,Qingdao Academy of Agricultural Sciences, Qingdao, Shandong 266100, China,Shandong Center of Crop Germplasm Resources, Jinan, Shandong 250100, China,College of Agronomy and Plant Protection, Qingdao Agricultural University, Shandong Provincal Key Laboratory of Dryland Farming Techniques, Qingdao, Shandong 266109, China and Qingdao Academy of Agricultural Sciences, Qingdao, Shandong 266100, China |
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| Abstract: | To identify winter wheat varieties with high germination rate, which is suitable for dry area of north China, drought treatments were performed using -0.50 MPa (19.6%) PEG-6000 aqueous solution. The results showed that the averages of the five traits under treatment were decreased by 77.3%, 40.0%, 30.7%, 16.7% and 78.0%, respectively compared with the control. Analysis with the traits of drought resistance showed that the 19.6% PEG-6000 simulation stress promoted the main radicle length elongation of some varieties, including Lovlin 13, Wennong 14 and Lunxuan 987, which may be active in drought-resistance response. D value calculated by the weighting membership function method was positively correlated with drought resistance indices, such as the coleoptile length, root number. According to UPGMA algorithm with drought resistance coefficient, the material was divided into two major categories in the genetic distance of 0.82. Accordingly, the strongest drought-resistance germplasm was indentified as Lovlin 13, Wennong 14, Chinese spring wheat, Luomai 8, Lunxuan 987, Taishan 22, Shannong 17, Tainong 18, Yanhangxuan 2, Zhongyu 6, Lumai 14, Tainong 6258 and Tainong 2987. |
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| Keywords: | wheat germination stage drought resistance coleoptile length membership function method clustering analysis |
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