Theor Appl Genet (2017) 130:1885–1902 DOI 10.1007/s00122-017-2931-3 ORIGINAL ARTICLE QTL mapping of root traits in phosphorus‑deficient soils reveals important genomic regions for improving NDVI and grain yield in barley 1 1 Xue Gong · Glenn McDonald Received: 11 October 2016 / Accepted: 30 May 2017 / Published online: 7 June 2017 © Springer-Verlag GmbH Germany 2017 Abstract detected on chromosomes 6H and 7H. When results from Key message Major QTLs for root rhizosheath size BIP and MET were combined, QTLs detected for grain are not correlated with grain yield or yield response to yield were also those QTLs found for NDVI. QTLs qGY5H, phosphorus. Important QTLs were found to improve qGY6H and qGY7Hb on 7H were robust QTLs in improving phosphorus efficiency. P efficiency. A selection of multiple loci may be needed to Abstract Root traits are important for phosphorus (P) acqui- optimize the breeding outcomes due to the QTL x Environ- sition, but they are often difficult to characterize and their ment interaction. We suggest that rhizosheath size alone is breeding values are seldom assessed under field condi - not a reliable trait to predict P efficiency or grain yield. tions. This has shed doubts on using seedling-based
TAG Theoretical and Applied Genetics – Springer Journals
Published: Jun 7, 2017
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