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The gene pairs of segment duplication in GrELF4s, GaELF4s, and GhELF4s. The chromosomes of G. raimondii, G. arboretum, and G. hirsutum are filled with green, blue, and yellow, respectively. Gene pairs involved in segment duplication are linked by a line. The scale on the circle is in megabases (Mb).
