During the development of disomic additions of rye (Secale cereak L.) chromosomes to wheat (Triticum aestivum L.), two reverse tandem duplications on wheat chromosomes 3D and 4A were isolated. By virtue of their meiotic pairing, the reverse tandem duplications initiated the chromatid type of the breakagefusion-bridge (BFB) cycle. This BFB cycle continued through pollen mitoses and in the early ...
