Detection of QTL for phosphorus efficiency and biomass traits at the seedling stage in wheat
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ORIGINAL PAPER
Detection of QTL for phosphorus efficiency and biomass traits at the seedling stage in wheat Y. Yuan1,2 · M. Zhang3 · H. Zheng3 · F. Kong3 · Y. Guo3 · Y. Zhao3 · Y. An3 Received: 21 April 2020 / Accepted: 24 July 2020 © The Author(s) 2020
Abstract Phosphorus (P) is one of the most vital nutrient elements in crop output and quality formation. In this study, four biomass, four P uptake efficiency (PupE), and three P-utilization efficiency (PutE) traits were investigated using a set of recombinant inbred lines (RILs) derived from a cross of “SN0431 × LM21”, under hydroponic culture trials at low P (LP) and normal P (NP) levels in two different seasons, respectively. A total of 85 QTL were identified on 18 chromosomes except for 1D, 2A, and 3D. Among them, 36 and 42 QTL were detected under LP and NP, respectively, and seven QTL were simultaneously detected under LP and NP. Seventeen relatively high-frequency QTL (RHF-QTL) were detected. The average contributions of 13 major RHF-QTL were over 10.00%. Five important QTL clusters were detected on chromosomes 4D, 5A, and 5B. Among them, positive linkages were observed between PutE and biomass traits at four QTL clusters, C1, C2, C3, and C6, showing these loci may be hot spots for genetic control of both phosphorus utilization and biomass accumulation in wheat seedlings. In addition, correlation analysis indicated that three biomass traits (SDW, RDW, and TDW) should be used as primary selection indexes for PE at the seedling stage. Keywords Wheat · Phosphorus efficiency (PE) · Morphological trait · Quantitative trait loci (QTL) · Recombinant inbred line (RIL) Abbreviations QTL Quantitative trait loci RIL Recombinant inbred line RHF-QTL Relatively high-frequency QTL PE Phosphorus efficiency PupE Phosphorus uptake efficiency PutE Phosphorus utilization efficiency SDW Shoot dry weight per plant RDW Root dry weight per plant
TDW Total dry weight per plant RSDW Ratio of root and shoot dry weight SPC Shoot P-content per plant RPC Root P-content per plant TPC Total P-content per plant RSPC Ratio of root and shoot P-content SPutE Shoot P-utilization efficiency RPutE Root P-utilization efficiency TPutE Total P-utilization efficiency
Communicated by V. Korzun.
Introduction
Electronic supplementary material The online version of this article (https://doi.org/10.1007/s42976-020-00067-4) contains supplementary material, which is available to authorized users. * Y. An [email protected] 1
Yantai Academy of Agricultural Sciences, Yantai 265500, Shandong, China
2
Jinan Academy of Agricultural Sciences, Jinan 205316, Shandong, China
3
State Key Laboratory of Crop Biology, Shandong Agricultural University, Tai’an 271018, Shandong, China
Phosphorus (P) is one of the most vital nutrient elements in crop output and quality formation, not only presenting in major organic molecules (e.g., RNA, DNA, ATP, and membrane phospholipids) but also playing important roles in photosynthesis, energy metabolism, enzymatic reactions, and sugar metabolis
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