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. 2018 Mar 30;8(5):1817–1828. doi: 10.1534/g3.118.200129

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Copyright © 2018 Pincot et al.

This is an open-access article 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 the original work is properly cited.

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Genetic mapping of a Fusarium wilt resistance gene (Fw1) in octoploid segregating populations. Likelihood-odds (LOD) statistics and linkage group positions (cM) are shown for a quantitative trait locus (QTL) for Fusarium wilt resistance identified by interval mapping in (A) Portola and (B) Fronteras S₁ mapping populations. The parents (Fronteras and Portola) and grandparents (04C018P004/05C165P001 and 97C093P007/97C209P001) of the S₁ populations and 93 S₁ individuals from each population were genotyped with the iStraw35 SNP array and artificially inoculated with isolate AMP132 of Fusarium oxysporum f. sp. fragariae at planting. Phenotypes were observed 36 weeks post-inoculation in a 2017 field experiment in Davis, California. The Fw1 QTL mapped to identical locations on the upper arm of chromosome 2C in both populations. One- and two-LOD confidence intervals are shown. Highlighted SNPs (bold red) were significant in genome-wide association studies.