子粒镉低积累型甜糯玉米材料的筛选  

Screening of sweet glutinous maize materials with low-Cd accumulation in grains

作　　者：李淑君[1] 付忠军[1] 祁志云[1] 袁亮[1] LI Shu-jun;FU Zhong-jun;QI Zhi-yun;YUAN Liang(Chongqing Academy of Agricultural Sciences,Chongqing 401329,China)

机构地区：[1]重庆市农业科学院,重庆401329

出　　处：《湖北农业科学》2024年第7期1-5,199,共6页Hubei Agricultural Sciences

基　　金：重庆市自然科学基金面上项目(cstc2021jcyj-msxmX0226);重庆市农业科学院市级财政科研项目(cqaas2023sjczsf003,cqaas2023sjczhx009)。

摘　　要：为筛选出在不同土壤镉(Cd)浓度胁迫下子粒Cd低积累型的甜糯玉米(Zea mays L.)材料,以45份甜糯玉米材料为对象,采用盆栽试验,设置2个土壤添加外源Cd处理,即C1(1.3 mg/kg)和C2(3.2 mg/kg),以不额外添加Cd为对照(CK),对甜糯玉米材料子粒Cd的积累差异进行研究。结果表明,甜糯玉米子粒Cd含量随土壤中Cd浓度的增加而增加,且在材料间存在极显著差异(P<0.01)。不同Cd浓度下,所有甜糯玉米材料子粒Cd的富集系数均小于1。聚类分析发现,有15份材料在不同Cd浓度下均表现出子粒低积累特性,其中S18、S29、S30、S36和S44这5份材料子粒的Cd含量在不同处理下均小于食品安全国家标准的0.1 mg/kg,说明这5份材料可作为子粒Cd低积累型亲本材料,为甜糯玉米Cd安全品种的培育提供种质资源。In order to screen the sweet glutinous maize(Zea mays L.)with low-Cd accumulation in grains under different soil cadmi⁃um concentrations stress,a pot experiment was conducted to study the difference of the Cd accumulation in grains by 45 sweet gluti⁃nous maize materials.2 soil cadmium concentrations were set,namely C1(1.3 mg/kg),C2(3.2 mg/kg),and the soil without exoge⁃nous-Cd was taken as the control(CK).The results showed that the Cd concentrations in sweet glutinous maize grains increased with the increase of Cd concentration in soil,and there were significant differences among the 45 sweet glutinous materials(P<0.01).The enrichment coefficients of Cd in grains of all maize materials were less than 1 under different Cd concentrations.The cluster analysis showed that 15 materials exhibited grain low-Cd accumulation characteristics under different Cd concentrations,and the Cd contents in the grain of S18,S29,S30,S36 and S44 were lower than the National Food Safety Standard(0.1 mg/kg).Thus,these 5 materials with low-Cd accumulation in grains could be used as parent materials,providing germplasm resources for the cultivation of Cd-safe va⁃rieties in sweet glutinous maize.

关 键 词：甜糯玉米(Zea mays L.) 子粒镉积累 外源镉 富集系数 Cd低积累型材料 

分 类 号：X53[环境科学与工程—环境工程] S513[农业科学—作物学]