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Development of an HRM-based, safe and high-throughput genotyping system for two low phytic acid mutations in soybean

文献类型： 外文期刊

作者： Tan, Yuan-Yuan 1 ; Yu, Xiao-min 2 ; Shu, Qing-Yao 1 ; Zhang, Hua-Li 3 ; Wang, Shou-Gen 4 ; Yuan, Feng-Jie 2 ; Shi, Chu 1 ;

作者机构： 1.Zhejiang Univ, Inst Crop Sci, State Key Lab Rice Biol, Hangzhou 310058, Zhejiang, Peoples R China

2.Zhejiang Acad Agr Sci, Inst Crop Sci & Nucl Technol Utilizat, Hangzhou 310021, Zhejiang, Peoples R China

3.China Natl Rice Res Inst, Hangzhou 310006, Zhejiang, Peoples R China

4.Quzhou Acad Agr Sci, Quzhou 324000, Peoples R China

关键词： Soybean;Low phytic acid;High-resolution melting curve analysis;GmMIPS1;GmIPK1

期刊名称：MOLECULAR BREEDING （ 影响因子：2.589； 五年影响因子：2.75 ）

ISSN：

年卷期：

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收录情况： SCI

摘要： Two low phytic acid (lpa) mutants, Gmlpa- ZC-2 (ZC-lpa) and Gm-lpa-TW-1 (TW-lpa), resulting from a G -> A mutation in GmIPK1 and a 2-bp deletion in GmMIPS1, respectively, were previously developed to increase the nutritional value and environmental friendliness of soybean meal. Two functional CAPS markers were subsequently developed for genotyping plants carrying the two mutant genes; however, both are costly and time consuming and hence unsuitable for large-scale breeding use. In the present work, by integrating a quick DNA extraction protocol with an optimized high-resolution melting curve (HRM) analysis, we developed a fast and high-throughput genotyping system for the two mutations. In this system, (1) DNAs are extracted within half an hour using a protocol that only requires freezing and heating of leaf disks in two non-toxic solutions and can be directly used for PCR; (2) for genotyping, asymmetric PCRs with competitive primers are performed, and the samples are then discriminated and grouped through HRM analysis; and (3) all steps are performed in a 96-well plate, and hence adaptable to high-throughput genotyping. Although the system was developed for two lpa mutations, the general principle should be applicable to any other genes in soybean.

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