Genotypic variation in element concentrations in brown rice from Yunnan landraces in China

文献类型： 外文期刊

第一作者： Zeng, Yawen

作者： Zeng, Yawen;Pu, Xiaoying;Du, Juan;Yang, Shuming;Zeng, Yawen;Pu, Xiaoying;Du, Juan;Yang, Shuming;Zeng, Yawen;Wang, Luxiang;Liu, Jiafu;Zhang, Hongliang;Zhang, Hongliang

作者机构：

关键词： brown rice;core collection;element concentrations;genotypical difference;SSR markers

期刊名称：ENVIRONMENTAL GEOCHEMISTRY AND HEALTH （ 影响因子：4.609； 五年影响因子：4.677 ）

ISSN：

年卷期：

页码：

收录情况： SCI

摘要： The mineral elements present in brown rice play an important physiological role in global human health. We investigated genotypic variation of eight of these elements (P, K, Ca, Mg, Fe, Zn, Cu, and Mn) in 11 different grades of brown rice on the basis of the number and distance coefficients of 282 alleles for 20 simple sequence repeat (SSR) markers. Six-hundred and twenty-eight landraces from the same field in Yunnan Province, one of the largest centers of genetic diversity of rice (Oryza sativa L.) in the world, formed our core collection. The mean concentrations (mg kg~(-1)) of the eight elements in brown rice for these landraces were P (3,480) > K (2,540) > Mg (1,480) > Ca (157) > Zn (32.8) > Fe (32.0) > Cu (13.6) > Mn (13.2). Mean P concentrations in brown rice were 6.56 times total soil P, so the grains are important in tissue storage of P, but total soil K is 7.82 times mean K concentrations in brown rice. The concentrations of the eight elements in some grades of brown rice, on the basis of the number and distance coefficients of alleles for 20 SSR markers for the landraces, were significantly different (P < 0.05), and further understanding of the relationship between mineral elements and gene diversity is needed. There was large variation in element concentrations in brown rice, ranging from 2,160 to 5,500 mg P kg~(-1), from 1,130 to 3,830 mg K kg~(-1), from 61.8 to 488 mg Ca kg~(-1), from 864 to 2,020 mg Mg kg~(-1), from 0.40 to 147 mg Fe kg~(-1), from 15.1 to 124 mg Zn kg~(-1), from 0.10 to 59.1 mg Cu kg~(-1), and from 6.7 to 26.6 mg Mn kg~(-1). Therefore, germplasm evaluations for Ca, Fe, and Zn concentrations in rice grains have detected up to sevenfold genotypic differences, suggesting that selection for high levels of Ca, Fe, and Zn in breeding for mass production is a feasible approach. Increasing the concentrations of Ca, Fe, and Zn in rice grains will help alleviate chronic Ca, Zn, and Fe deficiencies in many areas of the world.

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