Fig. 4.
Reproducible QTL peaks identified for length-to-width ratio on chromosome 2 and root width on chromosome 6 in F2:3 mapping populations L1408 × W133 (a) and L1408 × W279 (b). Dashed black vertical lines indicate annotated positions of predicted regulators of shape in carrots, namely OVATE Family Proteins 5 (OFP5) and TONNEAU1 Recruiting Motif 9 (TRM9). Additionally, dashed red vertical lines mark the approximate locations of previously reported chromosomal regions (QTLs) associated with carrot root shape traits (Macko-Podgórni et al. 2017; Turner et al. 2018; Brainard et al. 2022). The x-axis represents the physical position in mega bases (Mb) across chromosomes 2 and 6.