Seed Incompatibility in Primula

@article{Valentine1960SeedII,
  title={Seed Incompatibility in Primula},
  author={D. Valentine and S. Woodell},
  journal={Nature},
  year={1960},
  volume={185},
  pages={778-779}
}
WHEN diploid and autotetraploid plants of Primula veris are artificially crossed reciprocally, fertilization occurs and seed is set, but the seed is bad and germination is nil; the same is true for Primula vulgaris and P. elatior. Similar seed incompatibility (as it may be called) between diploids and their colchicine-induced autotetraploids has been reported in several other genera of flowering plants, for example, Gossypium1, and Galeopsis2; it is associated with post-fertilization breakdown… Expand
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