Czech J. Genet. Plant Breed., 2018, 54(2):52-58 | DOI: 10.17221/112/2016-CJGPB

Quantitative trait loci conferring grain selenium nutrient in durum wheat × wild emmer wheat RIL populationOriginal Paper

Jun YAN1, Wen-tao XUE2, Rong-zhi YANG2, Hai-bo QIN3, Gang ZHAO1, Fahima TZION4, Jian-ping CHENG*,2
1 Key Laboratory of Coarse Cereal Processing in Ministry of Agriculture, School of Pharmacy and Bioengineering, Chengdu University, Chengdu, P.R. China
2 College of Agriculture, Guizhou University, Guiyang, P.R. China
3 State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang, P.R. China
4 Institute of Evolution, University of Haifa, Haifa, Israel

The genetic and phenotypic basis of grain selenium concentration (GSeC) and yield per plant (GSeY) was studied in a tetraploid wheat population consisting of 152 F6 recombinant inbred lines (RILs) derived from a cross between Triticum dicoccoides (accession G18-16) and durum wheat cultivar Langdon (LDN) grown under three different environments over 2 years. Wide genetic variation was found among RILs for GSeC and GSeY. A total of 15 QTL effects on 9 chromosomes associated with GSeC and GSeY were detected, with a logarithm od the odds (LOD) score ranging from ca. 3.2 to 11.7, explaining 1.4% to 18.6% of the phenotypic variation. Higher GSeC and GSeY were conferred by the G18-16 allele at 10 loci and by the LDN allele at 5 loci. Seven QTLs showed interactions with environmental conditions. Five genomic regions harbouring QTLs for grain Se concentrations and yields were selected for further marker-assisted selection programs, facilitating the use of wild alleles for improvement of elite wheat cultivars.

Keywords: grain selenium concentration; grain selenium yield; quantitative trait locus mapping; tetraploid wheat; Triticum dicoccoides

Published: June 30, 2018  Show citation

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YAN J, XUE W, YANG R, QIN H, ZHAO G, TZION F, CHENG J. Quantitative trait loci conferring grain selenium nutrient in durum wheat × wild emmer wheat RIL population. Czech J. Genet. Plant Breed. 2018;54(2):52-58. doi: 10.17221/112/2016-CJGPB.
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