Fig. 6From: Tissue-specific gene expression and protein abundance patterns are associated with fractionation bias in maizeSorghum and maize share a common ancient ancestor. After speciation, maize underwent a whole-genome duplication (WGD) event around 5–12 million years ago. Retained duplicates can be identified by synteny to the modern sorghum genome. As demonstrated in this figure, retained duplicates can evolve in several ways [14, 34, 35]Back to article page