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The inheritance of wing colour and pattern in the lepidopterous genusTephrosia (Ectropis). II. Experiments involving melanicTephrosia bistortata and typicalT. crepuscularia

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Summary

  1. (1)

    In interspecific crosses betweenTephrosia crepuscularia andT. bistortata melanism introduced byT. bistortata remains, as within the limits of the species, a Mendelian recessive.

  2. (2)

    In certainF 1 broods mosaics appeared; their appearance was shown to depend on somatic segregation.

  3. (3)

    In theF 1 batches resulting from crossingbistortata females and crepuscularia males the females are non-viable.

  4. (4)

    Similarly, in back crosses between bistortata females and the two possibleF 1 males, one half of the females die.

  5. (5)

    No disturbances of the sex ratio arise in thecrepuscularia ♀ x bistortata ♀ broods.

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Literature quoted

  • Harrison, J. W. Heslop (1920). “The Inheritance of Melanism in the GenusTephrosia (Ectropis) with some Consideration of the Inconstancy of Unit Characters under Crossing.”Journ. Genetics, Vol. x. No. 1.

  • - (1923), “ The Inheritance of Wing Colour and Pattern in the Lepidopterous GenusTephrosia (Ectropis) with an Account of the Origin of a New Allelomorph.”Journ, Genetics, Vol. xiii. No. 3.

  • Harrison, J. W. Heslop and Garrett, F. C. (1926). “The Induction of Melanism in the Lepidoptera and its Subsequent Inheritance.”Proc. Roy. Soc, B, Vol. xcix.

  • Harrisoh, J. W. Heslop and Peacock, A. D. (1925). “Parthenogenesis originating in Lepidopterous Crosses.”Trans. Nat. Hist. Soc. Northumberland, Durham and Newcastle, N.S. Vol. vii.

  • Onslow, H. (1919). “Inheritance of Wing Colour in Lepidoptera. II. Melanism inTephrosia consonaria (var.nigra Bankes).”Journ. Genetics, Vol. ix. No. 1.

  • - (1920 a). “The Inheritance of Wing Colour in Lepidoptera. III. Melanism inBoarmia consortaria (var.consobrinaria Bkh.).”Journ. Genetics, Vol. ix. No. 4.

  • -(1920 b). “Inheritance of Wing Colour in Lepidoptera. IV. Melanism inBoamia abietaria.” Journ. Genetics, Vol. x. No. 2.

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Authors and Affiliations

  1. Armstrong College, Newcastle-upon-Tyne

    J. W. Heslop Harrison

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  1. J. W. Heslop Harrison
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Harrison, J.W.H. The inheritance of wing colour and pattern in the lepidopterous genusTephrosia (Ectropis). II. Experiments involving melanicTephrosia bistortata and typicalT. crepuscularia . Journ. of Gen. 17, 1–9 (1926). https://doi.org/10.1007/BF02983301

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  • DOI: https://doi.org/10.1007/BF02983301

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