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Cytogenetics of the parthenogenetic grasshopper Moraba virgo and its bisexual relatives

I. A new species of the virgo group with a unique sex chromosome mechanism

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Abstract

An undescribed bisexual grasshopper species closely related to the all-female parthenogenetic Moraba virgo has an X1X2Y sex chromosome mechanism which incorporates 7 chromosomes of the ancestral karyotype (the original X and three pairs of autosomes). Apparently three separate chromosomal fusions have occurred, one of these being a tandem fusion followed by a crossover which ‘stabilized’ it in the sex chromosome system. M. virgo probably arose from an ancestor which had X1X2Y males but lacked the tandem fusion present in the new species, the females of virgo having the constitution X1X1X2O.

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References

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Authors and Affiliations

  1. Department of Genetics, University of Melbourne, Australia

    M. J. D. White, G. C. Webb & J. Cheney

Authors
  1. M. J. D. White
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  2. G. C. Webb
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  3. J. Cheney
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Additional information

Supported by Public Health Service Grant GM-07212 from the Division of General Medical Sciences, U.S. National Institutes of Health, and by a grant from the Australian Research Grants Committee.

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White, M.J.D., Webb, G.C. & Cheney, J. Cytogenetics of the parthenogenetic grasshopper Moraba virgo and its bisexual relatives. Chromosoma 40, 199–212 (1972). https://doi.org/10.1007/BF00321465

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  • DOI: https://doi.org/10.1007/BF00321465

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