Liu Xingdan, Fan Fengfeng, Liu Manman, Long Weixiong, Yu Yajie, Yuan Huanran, Pan Guojing, Li Nengwu, Li Shaoqing, Liu Jianfeng
College of Agronomy, Hunan Agricultural University, Changsha, China.
State Key Laboratory of Hybrid Rice, Key Laboratory for Research and Utilization of Heterosis in Indica Rice of Ministry of Agriculture, Engineering Research Center for Plant Biotechnology and Germplasm Utilization of Ministry of Education, College of Life Science, Wuhan University, Wuhan, China.
Front Plant Sci. 2020 Aug 12;11:1229. doi: 10.3389/fpls.2020.01229. eCollection 2020.
Mineral elements play an extremely important role in human health, and are worthy of study in rice grain. Wild rice is an important gene pool for rice improvement including grain yield, disease, and pest resistance as well as mineral elements. In this study, we identified 33 quantitative trait loci (QTL) for Fe, Zn, Se, Cd, Hg, and As contents in wild rice . Of which, 29 QTLs were the first report, and 12 QTLs were overlapped to form five clusters as on chromosome 1, on chromosome 4, on chromosome 5, on chromosome 9, and on chromosome 10. Importantly, , can significantly improve the Se content while reduce the Cd content, and can significantly improve both the Fe and Zn contents, they were delimited to an interval about 53.8 Kb and 26.2 Kb, respectively. These QTLs detected from not only establish the basis for subsequent gene cloning to decipher the genetic mechanism of mineral element accumulation, but also provide new genetic resource for rice quality improvement.
矿质元素在人体健康中发挥着极其重要的作用，值得在稻谷中进行研究。野生稻是水稻改良的重要基因库，包括产量、抗病虫性以及矿质元素等方面。在本研究中，我们鉴定了野生稻中铁、锌、硒、镉、汞和砷含量的33个数量性状位点（QTL）。其中，29个QTL为首次报道，12个QTL重叠形成了5个簇，分别位于第1染色体上、第4染色体上、第5染色体上、第9染色体上和第10染色体上。重要的是， ，可显著提高硒含量同时降低镉含量， 可显著提高铁和锌含量，它们分别被定位到约53.8 Kb和26.2 Kb的区间内。从 中检测到的这些QTL不仅为后续基因克隆以解析矿质元素积累的遗传机制奠定了基础，也为水稻品质改良提供了新的遗传资源。
