Premium
Assessment and genetic analysis of heavy metal content in rice grain using an Oryza sativa × O. rufipogon backcross inbred line population
Author(s) -
Huang Derun,
Fan Yeyang,
Hu Biaolin,
Xiao Yeqing,
Chen Dazhou,
Zhuang Jieyun
Publication year - 2017
Publication title -
journal of the science of food and agriculture
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.782
H-Index - 142
eISSN - 1097-0010
pISSN - 0022-5142
DOI - 10.1002/jsfa.8598
Subject(s) - oryza rufipogon , backcrossing , oryza sativa , quantitative trait locus , population , biology , agronomy , brown rice , inbred strain , interspecific competition , biofortification , horticulture , botany , chemistry , food science , gene , micronutrient , genetics , demography , sociology , organic chemistry
BACKGROUND Heavy metal accumulation in rice is a growing concern for public health. Backcross inbred lines derived from an interspecific cross of Oryza sativa × O. rufipogon were grown in two distinct ecological locations (Hangzhou and Lingshui, China). The objective of this study was to characterise the contents of heavy metal in rice grains, and to identify quantitative trait loci (QTLs) for heavy metal contents. RESULTS The contents of Ni, As, Pb, Cr and Hg in milled rice showed a significant decline as compared with those in brown rice, whereas the content of Cd showed little change. The concentration of heavy metal in rice grain varied greatly between the two environments. A total of 24 QTLs responsible for heavy metal contents were detected, including two for both the brown and milled rice, 13 for brown rice only, and nine for milled rice only. All the QTLs except two had the enhancing alleles derived from O. rufipogon . Sixteen QTLs were clustered in six chromosomal regions. CONCLUSION Environmental variation plays an important role in the heavy metal contents in rice grain. QTLs detected in this study might be useful for breeding rice varieties with low heavy metal content. © 2017 Society of Chemical Industry