Ghd7 is a negative regulator of zinc concentration in brown rice
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Ghd7 is a negative regulator of zinc concentration in brown rice Mufid Alam & Yingnanjun Chen & Pingbo Li & Guangming Lou & Hao Zhou & Lei Wang & Rongjia Liu & Pingli Chen & Yin Zhou & Guanjun Gao & Dewei Tai & Xiaozhong Zhang & Yuqing He
Received: 4 September 2020 / Accepted: 26 November 2020 # The Author(s) 2020
Abstract Zinc (Zn) is an essential micronutrient for human, and improving Zn concentration in rice could be a simple and effective way to solve insufficient Zn uptake from daily diet. In this study, a recombinant inbred line (RIL) population was developed from a commercial hybrid combination Wandao153, and subjected to quantitative trait loci (QTL) detection for Zn concentration in brown rice and heading date. Five QTL for Zn concentration and six for heading date were detected across 2 years, among which two QTL for Zn concentration and two for heading date were co-located on chromosome 7 and 8, respectively. The two colocated QTL on chromosome 7, qZn7 and qHd7, were M. Alam : Y. Chen : P. Li : G. Lou : H. Zhou : L. Wang : R. Liu : P. Chen : Y. Zhou : G. Gao : Y. He (*) National Key Laboratory of Crop Genetic Improvement and National Center of Crop Molecular Breeding, Huazhong Agricultural University, Wuhan 430070 Hubei, China e-mail: [email protected]
likely to be Ghd7, a major gene for heading date and yield potential in rice. A combination of Zn concentration analysis and haplotype analysis of three pairs of genetic materials for Ghd7 revealed that it is a negative regulator of Zn concentration in brown rice. The other two co-located QTL on chromosome 8, qZn8 and qHd8, were likely to be Ghd8/DTH8, another major gene for heading date and yield potential in rice. These results could be of great use in genetic improvement of Zn concentration in brown rice. Keywords Oryza sativa . Zinc concentration . Heading date . Quantitative trait loci . Ghd7 . Ghd8 L. Wang e-mail: [email protected] R. Liu e-mail: [email protected] P. Chen e-mail: [email protected]
M. Alam e-mail: [email protected] Y. Chen e-mail: [email protected] P. Li e-mail: [email protected] G. Lou e-mail: [email protected] H. Zhou e-mail: [email protected]
Y. Zhou e-mail: [email protected] G. Gao e-mail: [email protected] D. Tai : X. Zhang (*) Anhui Academy of Agricultural Sciences, Hefei 230001, China e-mail: [email protected]
D. Tai e-mail: [email protected]
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Introduction Zn is an essential micronutrient for human, and Zn deficiency accumulates principle cause of malnutrition. Insufficient Zn uptake stimulates stunting growth, attenuated immunity power, diarrhea, lesions developed on eyes and skin, reduced wound healing, mental sickness, etc. (Gibson 2012). Rice (Oryza sativa L.) is a pioneer cereal crop being globally produced and a staple food feeding 3.5 billion of people, especially for Asian countries. Huge variation in Zn concentration in rice grain has been observed in different accessions (Roy and Sharma 2014). Therefore, development of rice cultivars displaying high
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