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Fig. 1. SSR linkage map based on the Sollux/Gaoyou (F1) DH population. Distances between markers are given in centimorgans, calculated from recombination frequencies according to the Kosambi mapping function. Map positions of putative QTL controlling oil content are presented on the right side of the linkage groups by circles or vertical bars. a: additive main effect, aa: Additive x additive epistatic main effect of two loci, ae: Additive by environment interaction effect. ‘+’ and ‘–’ indicate markers showing significant deviations (P 
0.05) from the expected 1:1 segregation ratio in favor of Sollux or Gaoyou alleles, respectively.
