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Sliding-window analysis of nucleotide diversities in the S-domain of SRK and Lal2. The nucleotide diversities (π) of Arabidopsis (solid line) and Brassica (dashed line) SRK were estimated using 8 and 11 alleles, respectively. Leavenworthia Lal2 diversity (stippled line) was estimated using seven sequences. The window size is 50 nucleotides with a step size of 1 nucleotide.
