Quantitative Trait Loci and Inter-Organ Partitioning for Essential Metal and Toxic Analogue Accumulation in Barley

• DOI: 10.1371/journal.pone.0153392
• Publication Date: 2016-04-14T18:49:46Z
• Authors: Stefan Reuscher; Andreas Kolter; Astrid Hoffmann; Klaus Pillen; Ute Krämer
• Keywords: Introgression; Biofortification; Hordeum

The concentrations of both essential nutrients and chemically similar toxic analogues accumulated in cereal grains have a major impact on the nutritional quality safety crops. Naturally occurring genetic diversity can be exploited for breeding improved varieties through introgression lines (ILs). In this study, multi-element analysis was conducted vegetative leaves, senesced flag leaves mature set 54 ILs wild ancestral Hordeum vulgare ssp. spontaneum cultivated variety cv. Scarlett. Plants were an anthropogenically heavy metal-contaminated soil collected agricultural field, thus allowing simultaneous localization quantitative trait loci (QTL) accumulation trace elements barley as model crop. For micronutrients Fe Zn interfering toxin Cd, we identified 25, 16 5 QTL, respectively. By examining gene content introgressions, associated QTL with candidate genes based homology to known metal homeostasis Arabidopsis rice. Global comparative analyses suggested preferential remobilization Cu Fe, over from leaf developing grains. Our data identifies grain micronutrient filling regulated nutrient-specific process, which operates differently homoeostasis. summary, study provides novel presence supports higher degree specificity element partitioning during than previously reported other cereals.