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. 2020 Sep 4:11:580452.
doi: 10.3389/fgene.2020.580452. eCollection 2020.

Novel QTL Conferring Phosphorus Acquisition and Utilization Efficiencies in Barley

Shangqing Gao  1 , Jiaqi Xia  1 , Shu Yuan  1 , Youjie Shen  1 , Xinting Zhong  1 , Senfeng Zhang  1 , Yuhang Li  1 , Deyi Hu  1 , Jian Zeng  1 , Ting Lan  1 , Yaxi Liu  2 , Guangdeng Chen  1
Affiliations

Novel QTL Conferring Phosphorus Acquisition and Utilization Efficiencies in Barley

Shangqing Gao et al. Front Genet. .

Abstract

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.

Keywords: barley; phosphorus acquisition; phosphorus deficiency; phosphorus utilization; quantitative trait loci.

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Figures

FIGURE 1
FIGURE 1
QTL for P- and yield-related traits detected in the RIL population.
See this image and copyright information in PMC

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