Phosphorus (P) is one of the essential macronutrients for rice. In this study, we used 120 rice backcross recombinant inbred lines (BRILs) derived from a cross indica cv. Changhui 891 and japonica cv. 02428. To elucidate the genetic control of P deficiency tolerance in rice, we have used high quality SNPs bin markers to identify some important loci underlying phosphorus deficiency. The bin map was generated which includes 3057 bins covering distance of 1266.5 cM with an average of 0.41 cM between markers. Based on this map, 50 loci, including four novel loci, qSL-3, qRL-11, qSDW-1, qRDW-1 with phenotypic variance 23.26%, 12.06%, 9.89% associated with P deficiency-related seedling traits were identified. No significant QTLs was found for root length under P+, shoot fresh weight P− and root length, shoot fresh weight for P+, P− and their ratio respectively. Root fresh weight, and root dry weight were strongly correlated to each other, and QTLs for these variables were located on the same chromosome 1 at the same region. Notably, 3 pleiotropic regions is the pioneer of our study, and these regions would facilitate map-based cloning to expedite the MAS selection for developing low phosphorous tolerant varieties. This study not only improves our knowledge about molecular processes associated with P deficiency, but also provides useful information to understand the genetic architecture of low phosphorous tolerance.

中文翻译：

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水稻对低磷胁迫的耐性新的主要基因座的遗传定位和鉴定。

磷（P）是水稻必需的大量营养素之一。在这项研究中，我们使用了120个杂交自杂交in稻的水稻回交重组自交系（BRIL）。Changhui 891 and japonica cv。02428.为了阐明水稻对磷缺乏耐受性的遗传控制，我们使用了高质量的SNPs bin标记来鉴定一些潜在的磷缺乏重要位点。生成的仓位图包括3057个仓位，覆盖距离为1266.5 cM，标记之间的平均值为0.41 cM。根据该图，有50个基因座，包括四个新基因座qSL - 3，qRL - 11，qSDW - 1，qRDW - 1表型变异的23.26％，12.06％，9.89％与磷缺乏相关的苗期性状相关。在P +以下的根长，鲜重P-和根长，在P +，P-的鲜重及其比例中均未发现明显的QTL。根鲜重和根干重之间存在极强的相关性，这些变量的QTL位于相同区域的同一染色体1上。值得注意的是，3个多效性区域是我们研究的先驱，这些区域将促进基于图的克隆以加快MAS选择，从而开发低磷耐受性品种。这项研究不仅提高了我们对与磷缺乏相关的分子过程的认识，而且为理解低磷耐受性的遗传结构提供了有用的信息。