摘要
稻田镉污染造成的水稻籽粒镉积累超标严重影响稻米食品安全。本试验以贵州省水稻耕种区的87个主栽品种为研究对象,通过对这些品种在镉污染稻田中的镉积累特征进行分析,并联合4个已知的低镉连锁位点进行基因型鉴定,分析供试品种的稻米镉积累特征并筛选稻米镉的低积累品种。最终筛选出含有镉低积累主效基因qCd7.1位点的9个水稻品种,如大粒香、D优35和成优33,其籽粒中的镉含量显著低于不含任何低镉位点基因的品种。本试验通过分子辅助手段结合表型鉴定进行低镉品种的筛选,为稻田镉污染的水稻耕种区提供了可行的选种建议。
Cadmium accumulation in rice grains caused by cadmium pollution in paddy fields seriously affects rice food safety. In this study, 87 main varieties collected in the rice cultivation area of Guizhou province were selected as the research object to investigate the cadmium accumulation characteristics of these rice varieties in the cadmium-contaminated paddy fields, and genotype identification was conducted by analyzing four known low cadmium linkage loci. And, the cadmium accumulation characteristics of experimental cultivars were further analyzed and the varieties with low cadmium accumulation were screened. Finally, nine rice varieties containing qCd7.1 locus of low cadmium accumulation-related major gene were screened, such as Dalixiang, D you 35 and Chengyou 33, etc. And, the cadmium content in their grains was significantly lower than that in the varieties without any low cadmium loci. To sum up, we screened low cadmium varieties by molecular marker-assisted breeding combined with phenotypic identification, which provided feasible seed selection suggestions for cadmium-contaminated rice cultivation areas.
作者
张上都
伍祥
彭菊
石邦志
蒙秀菲
柏连阳
宋泽
周乐良
ZHANG Shangdu;WU Xiang;PENG Ju;SHI Bangzhi;MENG Xiufei;BAI Lianyang;SONG Ze;ZHOU Leliang(Long Ping Branch of Graduate School,Central South University,Changsha Hu’nan 410125,China;Guizhou Rice Research Institute,Guizhou Academy of Agricultural Sciences,Guiyang 550006,China;Hunan Agricultural Biotechnology Research Institute,Hunan Academy of Agricultural Sciences,Changsha 410125,China;Intitute of Crop Germplasm Resources,Guizhou Academy of Agricultural Sciences,Guiyang 550006,China)
出处
《种子》
北大核心
2021年第11期15-21,共7页
Seed
基金
贵州省科技支撑项目“稳定耐镉型水稻Cd吸收差异蛋白的筛选与鉴定”(黔科合支撑[2018]2295号)
“优质、抗稻瘟病水稻恢复系G 578及杂交水稻组合选育研究”(黔科合支撑[2019]2305号)
长沙市科技重大专项“镉污染稻田微生物萃取快速修复技术的推广与示范”(kq 2006026)
国家自然科学基金“根内外微生物协同调控水稻镉积累的机理研究”(41907032)。
关键词
贵州省
水稻
耕种区
主栽品种
低镉筛选
Guizhou province
rice
farming area
main varieties
low cadmium screening