小麦基因型间籽粒镉积累及低积累资源筛选  

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

作　　者：杨玉敏[1] 张庆玉[1] 张冀[1] 田丽[1] 雷建容[1] 喻华[1] 杨武云[2] 

机构地区：[1]四川省农业科学院土壤肥料研究所,成都610066 [2]四川省农业科学院作物研究所,成都610066

出　　处：《中国农学通报》2010年第17期342-346,共5页Chinese Agricultural Science Bulletin

基　　金：国家自然科学基金"川麦42遗传背景中人工合成小麦导入位点的遗传效应研究"(30771338);四川省育种攻关项目"主要作物基因资源收集保存;发掘与优异新种质创制"(2006YZGG-28);四川省财政育种青年基金项目"小麦籽粒镉低积累基因资源筛选及控制基因的基因定位"(2010QNJJ-020);国家小麦产业技术体系项目"国家小麦产业技术体系建设专项资金项目"(nycytx-03);公益性行业科研专项项目"绿肥作物生产与利用技术集成研究及示范"(200803029-08)

摘　　要：为解决镉(Cd)污染带来的粮食安全问题,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。以在Cd浓度为20mg/kg下筛选出的9份低积累和16份高积累材料为研究对象,进—步研究这些高低积累材料在Cd浓度分别为0.4、5和20mg/kg土壤环境下籽粒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。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, 17.65% was above 7 mg/kg, and 8.82% was below 4 mg/kg. And then 9 low-cadmium-accumulation （LCA） wheat materials and 16 high-cadmium-accumium-accumulation ones were choosen to further study Cd concentrations in wheat grain under 0.4 mg/kg, 5 mg/kg and 20 mg/kg Cd soil. The results showed that Cd accumulation in different wheat grains demonstrated remarkable inter-species difference in heavy Cd contaminated soils. Cd concentrations 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 Therefore, the results in this study were significant same time, the three LCA selecting or breeding wheat materials were chosen. wheat varieties with low Cd accumulation, understanding the regulation of Cd accumulation in grain and so on.

关 键 词：小麦 Cd积累 基因型 积累差异 

分 类 号：S326[农业科学—作物遗传育种]