Phosphorus (P) is essential for plant growth, especially for soybean. P deficiency results in a severe decline of soybean productivity worldwide. Biomass is an important index to measure the tolerance of plants to low P. In this study, SNPs significantly associated with four P deficiency tolerance‐related traits were identified by genome‐wide association study (GWAS) using a natural population comprised of 272 soybean accessions from a wide geographic range and a high‐density NJAU 355K SoySNP array. As a result, four SNPs associated with RPDW (ratio of root dry weight under normal P condition and low P condition) with similar positions on chromosome 18 were identified and explained 24.71% to 30.89% of the phenotypic variation. One of these SNPs was identified in two environments and with two traits. Two genes were chosen as candidate genes responding to low P stress, one of which was annotated as a copper transporter and the other was annotated as a lipid transfer protein. In brief, these findings will be helpful for improving P efficiency and the marker‐assisted selection breeding in soybean.

中文翻译：

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全基因组关联研究大豆（Glycine Max）缺磷耐受性的苗期

磷（P）对于植物的生长至关重要，特别是对于大豆而言。磷缺乏会导致全世界大豆生产力的严重下降。生物量是衡量植物对低磷耐受性的重要指标。在这项研究中，通过全基因组关联研究（GWAS）使用包含272个大豆种质的自然种群，鉴定了与4个与磷缺乏耐受性相关的性状显着相关的SNP。来自广泛的地理范围和高密度NJAU 355K SoySNP阵列。结果，鉴定了与18位染色体上相似位置的RPDW（正常P条件和低P条件下的根干重比）相关的四个SNP，并解释了表型变异的24.71％至30.89％。这些SNP之一是在两种环境中被鉴定出来的，具有两个特征。选择了两个基因作为响应低磷胁迫的候选基因，其中一个注释为铜转运蛋白，另一个注释为脂质转移蛋白。简而言之，这些发现将有助于提高大豆的磷效率和标记辅助选择育种。