Gao Shangqing, Xia Jiaqi, Yuan Shu, Shen Youjie, Zhong Xinting, Zhang Senfeng, Li Yuhang, Hu Deyi, Zeng Jian, Lan Ting, Liu Yaxi, Chen Guangdeng
College of Resources, Sichuan Agricultural University, Chengdu, China.
Triticeae Research Institute, Sichuan Agricultural University, Chengdu, China.
Front Genet. 2020 Sep 4;11:580452. doi: 10.3389/fgene.2020.580452. eCollection 2020.
Phosphorus (P) deficiency in agricultural soil is a major constraint for crop production and increasing P acquisition efficiency (PAE) of plants is considered as one of the most cost-effective solutions for yield increase. The objective of this study was to detect quantitative trait loci (QTL) controlling (PAE) and P utilization efficiency (PUE) in barley under applied (+P) and non-applied P (-P) conditions. Based on the analysis of a recombinant inbred lines (RILs) population derived from a cross between a malting barley variety and a wild barley accession, 17 QTL controlling PAE, PUE and yield traits were detected. The phenotypic variation explained by each of these QTL ranges from 11.0 to 24.7%. Significant correlation was detected between most of P-related traits and yield traits. Five QTL clusters were identified on four different chromosomes (1H, 3H, 5H, and 7H). Two of the QTL clusters, located on chromosome 1H (for GPUP/PUP) and 7H (for SPUE/SPC), respectively, are novel. Fourteen genes located in the interval harboring the major QTL were identified as candidates associated with P efficiency. The stable QTL for PAE, PUE and yield-related traits could be important for breeding P-efficient barley varieties.
农业土壤中的磷（P）缺乏是作物生产的主要限制因素，提高植物的磷吸收效率（PAE）被认为是提高产量最具成本效益的解决方案之一。本研究的目的是检测在施磷（+P）和不施磷（-P）条件下控制大麦磷吸收效率（PAE）和磷利用效率（PUE）的数量性状位点（QTL）。基于对一个由麦芽大麦品种和野生大麦材料杂交产生的重组自交系（RILs）群体的分析，检测到17个控制PAE、PUE和产量性状的QTL。这些QTL中每个所解释的表型变异范围为11.0%至24.7%。大多数与磷相关的性状和产量性状之间检测到显著相关性。在四条不同的染色体（1H、3H、5H和7H）上鉴定出五个QTL簇。其中两个QTL簇，分别位于1H染色体（用于GPUP/PUP）和7H染色体（用于SPUE/SPC）上，是新发现的。在包含主要QTL的区间内定位的14个基因被鉴定为与磷效率相关的候选基因。PAE、PUE和产量相关性状的稳定QTL对培育磷高效大麦品种可能很重要。
