Table 4 Inferred ages of North American allopolyploid formation
From: Unraveling reticulate evolution in North American Dryopteris (Dryopteridaceae)
Allopolyploid | Oldest divergence from putative maternal parent | Oldest divergence from putative paternal parent | Inferred age of earliest polyploid formation |
|---|---|---|---|
D. campyloptera (4x) | D. intermedia (2x), 6.9 Ma | D. expansa (2x) 4.6 Ma | ≤ 4.6 Ma |
D. carthusiana (4x) | “D. semicristata” (2x?), 25.7 Ma | D. intermedia (2x), 11.5 Ma | ≤ 11.5 Ma |
D. celsa (4x) | D. ludoviciana (2x), 4.6 Ma | D. goldiana (2x), 7.9 Ma | ≤ 4.6 Ma |
D. clintoniana (6x) | D. cristata (4x), 13.7 and 7.3 Ma | D. goldiana (2x), 7.9 Ma | ≤ 7.3 Ma |
D. cristata (4x) | “D. semicristata” (2x?), 25.7 Ma | D. ludoviciana (2x), 13.7 Ma | ≤ 13.7 Ma |
D. filix-Mas (4x) | D. oreades/D. abbreviata/D. affinis/D. caucasica, 5.3 Ma | D. affinis/D. caucasica?, 10.1 Ma | ≤ 5.3 Ma |