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Distribution of clubroot severity (disease severity index, DSI) following inoculation with four pathotypes (3A, 3D, 3H, and 5X) of P. brassicae in a doubled haploid (DH) population derived from a BC2 plant of Brassica rapa ECD01 crossed with B. napus DH16516. Colors in each stacked column represent the proportion of the lines with a DSI value within that decile (= 10% range).
