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中国农学通报

中国农学通报 ›› 2010, Vol. 26 ›› Issue (17): 342-346.

所属专题： 生物技术； 资源与环境； 小麦

• 资源 环境 生态 土壤 气象 • 上一篇    下一篇

小麦基因型间籽粒镉积累差异及低镉积累资源筛选

杨玉敏 张庆玉   

  • 收稿日期:2010-02-05 修回日期:2010-03-17 出版日期:2010-09-05 发布日期:2010-09-05
  • 基金资助:

    国家自然科学基金;国家973项目;国家863计划;国家小麦产业技术体系项目;公益性行业科研专项项目;四川省育种攻关项目;四川省财政育种青年基金项目

Genotypic Differences of Cadmium Accumulation in Triticum aestivum and Screening of Low- accumulation Material

  • Received:2010-02-05 Revised:2010-03-17 Online:2010-09-05 Published:2010-09-05

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摘要：

为解决镉(Cd)污染带来的粮食安全问题，本试验采用盆栽试验对102份不同基因型的小麦资源在Cd污染土壤环境下小麦籽粒Cd积累差异进行了分析。结果表明，在土壤Cd含量为20mg/kg时，102份小麦中73.53%的籽粒Cd积累为4~7mg/kg，17.65%籽粒Cd积累〉7mg/kg，8.82%籽粒Cd积累〈4mg/kg。将在Cd浓度为20mg/kg下筛选出的9份低积累和16份高积累材料进—步在Cd浓度为0.4mg/kg, 5mg/kg和20mg/kg土壤环境下分析籽粒Cd积累差异, 结果表明，小麦籽粒Cd积累与基因型有很大的关系，不同基因型小麦在不同Cd浓度下籽粒Cd积累差异显著，籽粒Cd积累量与土壤中Cd含量呈显著正相关，籽粒Cd积累系数与土壤Cd含量呈负相关。同时根据材料在不同浓度Cd积累情况，筛选出3份低Cd积累小麦，为进一步选育小麦籽粒低Cd积累品种奠定材料基础。

关键词: 生物多样性, 生物多样性, 生物多样性保护, 海岸带, 生态系统

Abstract:

To limit cadmium(Cd) accumulation in the wheat grain, the experiment was conducted to study Cd accumulation in grain among 102 different wheat cultivars or materials. The results showed that Cd concentrations of 73.53% wheat grain varied from 4 mg/kg to 7 mg/kg in soil with 20 mg/kg Cd, the Cd concentration of 17.65% of the wheat varieties grain was above 7 mg/kg, and 8.82% was below 4 mg/kg. And then 9 low-cadmium-accumulation(LCA) wheat material and 16 high-cadmium-accumium-accumulation ones were choosen to further study Cd concentration in wheat grain under 0.4 mg/kg, 5 mg/kg and 20 mg/kg Cd soil. The results Cd accumulation in different wheat grains demonstrated remarkable inter-species difference in heavy Cd contaminated soils. Concentrations of Cd in soil were closely positive related to Cd concentrations in grain, and were negatively related to phyto-accumulation facor (PAF) of Cd in grain. At the same time, the three LCA wheat materials were chosen. Therefore, the results in this study were significant in selecting or breeding wheat varieties with low Cd accumulation, understand the regulation of Cd accumulation in grain and so on.