小麦种质芽期和苗期的耐盐性鉴定评价
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江苏省农业科技自主创新资金项目(CX(10)127);科技基础性工作专项(2007FY110500-06)


Germplasm screening for salinity tolerance at germination and seedling stages in wheat
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The Self-directed Innovation Fund of Agricultural Science and Technology in Jiangsu Province, China (Grant No. CX [10]127);Special Foundation for State Science and Technology Basic Research(2007FY110500-06)

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    摘要:

    【目的】研究不同来源小麦种质资源的耐盐性差异,筛选耐盐性较好的品种(系),探索不同生育期小麦耐盐性鉴定的适合盐浓度,为小麦耐盐鉴定及耐盐小麦品种选育提供参考。【方法】对来源不同的293份小麦种质,在1.5%NaCl盐溶液下进行盐胁迫处理,调查各种质的芽期相对盐害指数;选择芽期相对耐盐指数小于40%的24份小麦资源,在苗期进行不同盐浓度胁迫鉴定,测量不同处理的根长及苗高相对生长率。【结果】筛选出16份芽期相对盐害指数小于20%的高耐盐种质和42份芽期相对盐害指数20-40%耐盐的小麦种质;苗期鉴定表明1.0% NaCl盐浓度为合适的筛选浓度、根长相对生长率为适合的苗期耐盐性鉴定指标,以此为鉴定技术筛选出了Marmin-Minhardi譎44-Minturki和花树蒲两份芽期及苗期均表现耐盐的优异小麦种质;【结论】来源不同的小麦资源中芽期综合耐盐性大小依次为地方品种>国外引进品种>中间试验品系;Marmin-Minhardi譎44-Minturki和花树蒲两份耐盐小麦种质可作为小麦耐盐育种新种质。

    Abstract:

    【Objective】 The study aims at the work of developing better wheat varieties with salinity tolerance and searching for suitable NaCl concentration for screening salinity tolerance.【Method】293 accessions of wheat germplasm were treated with 1.5%NaCl at germination stage to get the relative salt injury rate; 24 varieties whose relative salt injury rate below 40% were treated with different NaCl concentration at seedling stage to get the relative growth rate.【Result】The relative salt injury rate indicated 16 varieties were high salt-tolerant lines and 42 varieties were salt-tolerant lines; 1.0% NaCl was the suitable concentration for wheat salt-tolerance at seedling stage, Marmin-Minhardi譎44-Minturki and Huashupu were salt-tolerant lines at both germination and seeding stages;【Conclusion】The salinity tolerance of different original germplasm were bred and local varieties > introduced varieties > advanced lines; Marmin-Minhardi譎44-Minturki and Huashupu were newly evaluated germplasm with salinity tolerance and may be useful in wheat improvement for salinity tolerance.

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张巧凤.小麦种质芽期和苗期的耐盐性鉴定评价[J].植物遗传资源学报,2013,14(4):620-626.

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  • 收稿日期:2012-10-15
  • 最后修改日期:2013-01-17
  • 录用日期:2013-06-07
  • 在线发布日期: 2013-06-07
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