Fig. 1From: Systematic trait dissection in oilseed rape provides a comprehensive view, further insight, and exact roadmap for yield determinationSeveral putative models underlying the co-localization of QTL for two traits. The first and second models (A and B) are tightly linked and generally called pleiotropy, which are easily understood. The third (C) is physiological interaction: one gene can indirectly affect a trait by regulating another traitBack to article page