Early vigour improves phosphate uptake in wheat

Journal of Experimental Botany
Peter R RyanRichard A James

Abstract

Quantitative trait loci (QTLs) for shoot biomass were identified in wheat grown on a soil high in total phosphorus (P) but low in plant-available P. The two populations screened included recombinant inbred lines (RILs) from Chuan-Mai 18/Vigour 18 and doubled-haploid lines from Kukri/Janz. Glasshouse-grown plants were harvested at the five-leaf stage. Seven QTLs for shoot biomass were identified in the RILs, with the largest on chromosome 7A accounting for 7.4% of the phenotypic variance. RILs from the upper tail had larger embryos than RILs from the lower tail. Tail lines were then grown in non-limiting P and the results indicated that early vigour and the capacity to access P contributed to the initial distribution. The influence of early vigour on P nutrition was examined further with advanced vigour lines (AVLs). The AVLs accumulated more shoot biomass, maintained lower shoot P concentrations, and showed greater P-acquisition efficiency than Vigour 18. Nine QTLs for shoot biomass were identified in the Kukri/Janz population. Two on chromosomes 4B and 4D accounted for 24.8% of the variance. Candidates underlying these QTLs are the Rht genes. We confirmed the influence of these genes using near-isogenic lines with different Rh...Continue Reading

References

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Citations

Feb 14, 2016·Journal of Experimental Botany·Richard A JamesEmmanuel Delhaize
Jun 9, 2017·TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik·Xue Gong, Glenn McDonald
Jun 1, 2018·BioMed Research International·Rita ArmonienéAakash Chawade
Mar 29, 2019·Journal of Experimental Botany·Zhigan ZhaoEnli Wang

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Methods Mentioned

BETA
genotyping
dissector
transgenic

Software Mentioned

Vigour
Genstat
EGA
MultiQTL
WINRhizo Pro
MapChart
SigmaPlot
WinRhizo

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