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Variation in Cadmium Tolerance and Accumulation and Their Relationship in Wheat Recombinant Inbred Lines at Seedling Stage

文献类型： 外文期刊

作者： Ci, Dunwei 2 ; Jiang, Dong 1 ; Dai, Tingbo 2 ; Jing, Qi 2 ; Cao, Weixing 2 ;

作者机构： 1.Nanjing Agr Univ, Coll Agr, Nanjing 210095, Jiangsu Prov, Peoples R China

2.Nanjing Agr Univ, Key Lab Crop Physiol & Ecol So China, Minist Agr Hitech, Key Lab Informat Agr Jiangsu Prov, Nanjing 210095, Jiangsu Prov, Peoples R China

3.Crops Inst Shandong Acad Agr Sci, Jinan, Peoples R China

关键词： Cadmium (Cd);Wheat (Triticum aestivum L.);Recombinant inbred lines (RILs);Cd-tolerant index;Membership function analysis

期刊名称：BIOLOGICAL TRACE ELEMENT RESEARCH （ 影响因子：3.738； 五年影响因子：3.44 ）

ISSN： 0163-4984

年卷期： 2011 年 142 卷 3 期

页码：

收录情况： SCI

摘要： In order to identify the variation of cadmium (Cd) tolerance and accumulation in wheat (Triticum aestivum L.), a study was conducted in hydroponic culture with or without Cd using recombinant inbred lines (RILs) consisting of 103 RILs derived from a cross of Chuan 35050 x Shannong 483 at seedling stage. The parameters of shoot height, secondary roots numbers, tiller numbers, shoot dry weights, root dry weights, and maximum efficiency of photosystem II photochemistry under dark-adopted conditions were measured. Cd-tolerant indexes were then calculated as relative the above traits under Cd stress to those under the control. Cd concentration in shoot or root was determined and Cd accumulation and translocation were calculated. Based on the Cd-tolerant indexes, membership function analysis was used to determine the variation of the above parameters. The results showed a continuous distribution among the RILs and then the RILs were divided into five groups according to their tolerance. Lines 76 and 17 were considered as the most Cd-tolerant lines while lines 103 and 51 were as the most Cd-sensitive lines. Meanwhile, lines 38 and 79 were with minimum Cd translocation ratio while lines 88 and 53 were with maximum Cd translocation ratio, respectively. The relationship between Cd tolerance and accumulation was not significant, indicating Cd tolerance and accumulation may be independent traits in the RILs. Thus, lines with high Cd tolerance and less Cd accumulation could be selected for wheat breeding.

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