Hybrid queen butterflies from the cross Danaus chrysippus ( L . ) × D . gilippus ( Cramer ) : confirmation of species status for the parents and further support for Haldane ’ s Rule

@inproceedings{Smith2002HybridQB,
  title={Hybrid queen butterflies from the cross Danaus chrysippus ( L . ) × D . gilippus ( Cramer ) : confirmation of species status for the parents and further support for Haldane ’ s Rule},
  author={David Solance Smith and Ian Jonathan Gordon and Gugs Lushai and Dave Goulson and John A. Allen and Norman Maclean},
  year={2002}
}
A cross between queen butterflies of the Palaeotropical species Danaus chrysippus and the Neotropical D.gilippus was achieved with difficulty in both directions. Only one progeny ( N = 70) was reared comprising sterile males and inviable females in a precisely 1:1 ratio. Both prezygotic and postzygotic barriers to gene flow are strong. The result supports Haldane’s Rule, to which we propose a minor amendment. The F 1 hybrids were intermediate for background colour between the brown (genotype BB… CONTINUE READING

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