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Immunolocalization of meiotic chromosome axis protein ASY1 (green) and synaptonemal complex transverse filament protein ZYP1 (red) in diploid and tetraploid Arabidopsis arenosa. G2 to pachytene in diploid (A–F) and tetraploid (G–L). G2 (A,G), leptotene (B,H), early zygotene (C,I), mid-zygotene (D,J), late-zygotene (E,K), pachytene (F,L). White arrows in (J) highlight parallel ZYP1 stretches. Chromosomes have been stained with DAPI (blue) and bar = 10 μm.
