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. 2006 Sep;18(9):2123–2133. doi: 10.1105/tpc.106.043794

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Copyright © 2006, American Society of Plant Biologists

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Figure 7. — Model of Centromere Evolution.

(A) The original centromere contains mainly satellite repeats (blue box) that are associated with CENH3 (green circles).

(B) A neocentromere emerges, coupled with the inactivation of the original centromere via unknown epigenetic mechanisms. The CENH3-associated chromatin in the neocentomere may contain active genes (red bars).

(C) A new satellite repeat (turquoise box) emerges in the neocentromere. The satellite array in the inactivated centromere may degrade and eventually be eliminated during evolution.

(D) The new satellite repeat array expands, and the survived neocentromere evolves to eventually become a typical satellite repeat-based mature centromere.