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. 2016 Dec 27;130(4):697–716. doi: 10.1007/s00122-016-2844-6

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© The Author(s) 2016

Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.

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Fig. 4 — Confounding effects on crude fat QTL mapping in BTx642 were controlled by incorporating trait covariates. a QTL mapping results for crude fat with no covariates included. Markers along the x-axis are positioned based on genetic distance (cM) b Adding pericarp color (red) and amylose (blue) as additive covariates eliminated false-positive QTLs at the yellow1 and waxy loci, respectively. c Including amylose as an additive covariate and pericarp color as an interactive covariate eliminated false-positive QTLs and increased the peak LOD score found at 50 Mb on chromosome 10 near the homologue of maize diacylglyceroal O-acyltransferase 1 (DGAT1)