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吴儒刚,裴艳婷,张 超,范业泉,靳义荣,刘 鹏,贾德新,戴忠民.基于盐胁迫的小麦农艺性状多样性分析及评价[J].麦类作物学报,2019,(9):1029
基于盐胁迫的小麦农艺性状多样性分析及评价
Analysis and Evaluation of Agronomic Character Diversity of Wheat Based on Salt Stress
  
DOI:10.7606/j.issn.1009-1041.2019.09.003
中文关键词:  盐胁迫  多样性  农艺性状  黄淮麦区
英文关键词:Salt stress  Diversity  Agronomic traits  Huanghuai wheat region
基金项目:山东省自然科学基金项目(ZR2019MC032);国家自然科学基金项目(31271667);国家重点研发计划项目(2016YFD0300400)
作者单位
吴儒刚,裴艳婷,张 超,范业泉,靳义荣,刘 鹏,贾德新,戴忠民 (1.德州市农业科学研究院山东德州 2530152.德州学院生物系山东德州 253023) 
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中文摘要:
      为筛选耐盐性优良的小麦资源,在0、0.3%和0.5% NaCl处理下,对黄淮麦区的132个小麦品种的8个数量性状进行了遗传多样性、相关性、主成分分析和耐盐性评价。结果表明,供试材料具有丰富的遗传多样性,且随盐浓度的升高,被测指标的变异系数和遗传多样性指数逐渐增大,其中单株成穗数、穗下茎节长和单株产量的变异系数均大于10%;除株高外,其他性状的遗传多样性指数均大于2。相关分析表明,在高盐(0.5% NaCl)胁迫下,株高与单株产量极显著正相关,而在低盐(0.3% NaCl)胁迫下则相关不显著;在低盐胁迫下,千粒重与单株产量极显著正相关,而在高盐胁迫下相关性不显著。主成分分析表明,在低盐、高盐胁迫下,前4个主成分累计贡献率达到82.677%、88.897%。以综合耐盐指数为依据,发现河北省的衡4399、石麦15,山东省的青麦6号、青丰1号、青农2号和烟农5286,河南省的洛旱6号、郑麦366、周麦22号、周麦23号和周麦28号共11个品种在两种盐分条件下均表现为耐盐性强。结合田间群体表现和产量,认为周麦22号、洛旱6号、郑366、青农2号、烟5286和衡4399为高产耐盐小麦种质资源,可在耐盐育种工作中加以利用。
英文摘要:
      In this study, the evaluation of salt tolerance and analysis of genetic diversity, correlation and principal component were conducted with eight main quantitative traits of 132 wheat varieties from Huanghuai wheat region grown in salt pond with 0.3% and 0.5% salt concentration. Results indicated that the genetic diversity was abundant for the tested materials, and the coefficient of variation and genetic diversity index were increased with the increase of salt stress, in which, the variation coefficient of panicle number per plant, stem node length under panicle and yield per plant was greater than 10%, and the genetic diversity index of other traits was greater than 2, except for plant height. Analysis of the correlation between plant height and yield per plant indicated that there is significantly positive and not significant correlation, respectively, under high and low salt concentrations(0.5% and 0.3% NaCl). In addition, the 1 000-grain weight had significantly positive and not significant correlation with yield per plant, respectively, under low and high salt concentrations.Principal component analysis showed that the cumulative contribution rate of the first four principal components was 82.677% and 88.897% under low and high salt stress, respectively. Based on the comprehensive salt tolerance index, 11 varieties:Heng 4399 and Shimai 15 from Hebei Province, Qingmai 6, Qingfeng 1, Qingnong 2 and Yannong 5286 from Shandong Province, Luohan 6, Zhengmai 366, Zhoumai 22, Zhoumai 23 and Zhoumai 28 from Henan Province were screened out, which showed strong salt tolerance under two salt conditions. Combined with the field traits and yield, it can be concluded that Zhoumai 22, Luohan 6, Zheng 366, Qingnong 2, Yan 5286 and Heng 4399 are high-yield and salt-tolerance wheat germplasm resources which can be utilized in salt-tolerant breeding.
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