QTL detection for grain yield and micro-nutrition contents in rice (Oryza sativa) using an interspecific backcross population derived from Dongxiang wild rice (Oryza rufipogon)

文献类型： 外文期刊

第一作者： Duan, Liuying

作者： Duan, Liuying;Xie, Jiankun;Duan, Liuying;Wu, Ting;Li, Xia;Chen, Ping;Hu, Biaolin;Huang, Derun;Li, Xiaobai;Wen, Xixian

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关键词： backcross inbred lines; biofortification; brown rice; Dongxiang wild rice (Oryza rufipogon Griff.); grain yield and yield components; micro-nutritional contents; milled rice; QTLs

期刊名称：CROP & PASTURE SCIENCE （ 影响因子：2.249； 五年影响因子：2.541 ）

ISSN： 1836-0947

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收录情况： SCI

摘要： Context. Enhancing grain yield and micro-nutrition contents in rice (Oryza sativa L.) through biofortification breeding is an efficient way to address micro-nutrient deficiencies in human. Aims. QTL mapping for grain yield and micro-nutritional traits is prerequisite for developing new rice varieties. Methods, QTLs for grain yield and micro-nutritional traits were identified using a backcross inbred lines (BIL) derived from an interspecific backcross of Xieqingzao B and Dongxiang wild rice (Oryza rufipogon Griff.). Key results. A total of 16 and 29 QTLs were identified for grain Zn, Mn and Cu contents, including three for brown and milled rice, 10 for brown rice only, and three for milled rice only, and for grain related traits, respectively. Among grain micro-nutrient QTLs, three QTLs, qMn4, qMn6.2 and qZn6.2, showed genetic effects on both brown and milled rice. Conclusion. Sixteen QTLs for grain related traits and eight QTLs for grain micro-nutrient content had 0. rufipogon favourable alleles. A total 31 QTLs were clustered eight chromosomal regions. Importantly, two clusters, qZn4/qGW4 and qZn6.2/qMn6.2/qCu6.3/qGYP6.2, had the favourable wild alleles, suggesting that 0. rufipogon alleles had synergistic effects on both yield component and micro-nutrient content. Implications. These candidate QTLs could be useful for the improvement of grain yield and micro-nutrients through QTL pyramiding.

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