中国小麦微核心种质籽粒Cu、Zn积累差异性分析及低积累品种筛选
毕业论文关键词：重金属污染；小麦微核心种质；积累差异；品种筛选
Differences of Copper and Zinc accumulation among Chinese wheat mini-core collections germplasms and screening for low Cu and Zn accumulative cultivars in grains
Abstract: To reduce the pollution of heavy metals into the food chain farmland, grain low heavy metal screening oic increase crop varieties, adopts heavy metal pollution of farmland in situ screening method, two years of field experiment, the micro of 262 wheat core germplasm grain of heavy metal copper (Cu) and zinc (Zn) accumulation difference. 262 wheat varieties were planted in a Nanjing typical Cu pollution farmland in 2014-2016.The contaminated farmland heavy metal contents were 1150.4 and 213.2 mg•kg-1, for Cu and Zn, respectively, which were close to the the GradeⅡof environmental quality standard for soil ( GB 15618—1995).There were significant differences in the accumulation capacity of Cu and Zn in 262 wheat varieties .The two-years variation of Cu content in wheat grain were 5.92 ~ 16.50 mg•kg-1 and 6.93 ~ 21.16 mg•kg-1 , respectively. The variation of Zn content in grains were 34.47 ~ 82.68 mg•kg-1 and 42.88 ~ 91.07 mg•kg-1 , respectively. According to the standards on Foods and Products ( NY861—2004 ), The exceeding rates of Cu content were 64.9% and 88.5% in two years, and the exceeding rates of Zn content were 89.8%, 93.8% in two years. A total of 262 wheat varieties were pided into five groups. In the end, we draw conclusions based on the field results: Cu low accumulation varieties include：Chushanbao、Baihuama、Hongchunmai、Hongheshangtou、Laoqimai、Xinshuguang 6、Fuzhuang 30、Motuoxiaomai、Heshangmai. Zn low cultivars include:Chushanbao、Shuiyuan86、Banjiemang、KaBKa3、Zangdong 4、Lvhan 328 and Xianmai . Among them, Chushanbao is low Cu and Zn accumulation variety.
Key words: heavy metal pollution; mini-core collections germplasms; accumulation of differences; variety screening
目 录
摘要 1
关键词 1
Abstract. 1
Key words 2
引言 2
1：材料与方法 3
1.1 实验田概况 3
1.2 供试材料 3
1.3 试验设计 3
1.4样品处理与分析 3
1.4.1土壤样品的分析测定 3
1.4.2小麦籽粒重金属含量测定 4
1.4.3 小麦籽粒富集系数： 4
1.5数据统计分析方法 4
1.6污染评价标准 4
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