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Fig. 2 | Genome Biology

Fig. 2

From: The Aquilegia genome reveals a hybrid origin of core eudicots

Fig. 2

Three scenarios for the relationship between columbine tetraploidy and core eudicot “gamma” hexaploidy. The gamma hexaploidy is a two-step process: a single round of WGD creates tetraploids (4n) whose unreduced gametes then fuse with diploid gametes (+2n). Scenario 1: gamma hexaploidy precedes the split between columbine and core eudicots, with the former undergoing an additional tetraploidy. Scenario 2: both gamma hexaploidy and columbine tetraploidy occur after the split between columbines and core eudicots. Scenario 3: columbine tetraploidy is derived from the ancient tetraploidy which was the first step of the process leading to gamma hexaploidy

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