The evolutionary history of Antirrhinum suggests that ancestral phenotype combinations survived repeated hybridizations.

@article{Wilson2011TheEH,
  title={The evolutionary history of Antirrhinum suggests that ancestral phenotype combinations survived repeated hybridizations.},
  author={Yvette Wilson and Andrew Hudson},
  journal={The Plant journal : for cell and molecular biology},
  year={2011},
  volume={66 6},
  pages={
          1032-43
        }
}
The model species Antirrhinum majus (the garden snapdragon) has over 20 close wild relatives that are morphologically diverse and adapted to different Mediterranean environments. Hybrids between Antirrhinum species have been used successfully to identify genes underlying their phenotypic differences, and to infer how selection acts on them. To better understand the genetic basis for this diversity, we have examined the evolutionary relationships between Antirrhinum species and how these relate… 

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