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Reply to Johannesson & Johannesson

Published online by Cambridge University Press:  11 May 2009

J. Grahame ,
P. J. Mill ,
M. Double  and
S. L. Hull
J. Grahame
Affiliation:
Department of Pure and Applied Biology, University of Leeds, Leeds, LS2 9JT
P. J. Mill
Affiliation:
Department of Pure and Applied Biology, University of Leeds, Leeds, LS2 9JT
M. Double
Affiliation:
Department of Zoology, University of Leicester, University Road, Leicester, LE1 7RH
S. L. Hull
Affiliation:
Department of Pure and Applied Biology, University of Leeds, Leeds, LS2 9JT
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Extract

Johannesson & Johannesson (1993) contend that we have misread their earlier paper (Johannesson & Johannesson, 1990). They write that it is only possible to use neutral loci to study genetic relationships in closely related taxa (Johannesson & Johannesson, 1993) and that, there-fore, they had dismissed the variation in Aat-1 when considering the taxonomic status of Littorina neglecta (Johannesson & Johannesson, 1993). However, in their earlier paper they write: & ldquo;This [the pattern of variation in Aat-1] indicates that the within-site differentiation at Aat-1 is caused by diversifying selection in the two different micro-habitats rather than to a reproductive barrier between neglecta and saxatilis type snails” (Johannesson & Johannesson, 1990, p. 94). Therefore, after dealing separately with the pattern of variation at four loci which are ‘presumably neutral’ (Johannesson & Johannesson, 1990, p. 96), the Aat-1 variation is considered by these authors in the context of a putative reproductive barrier. The argument is repeated at the beginning of the discussion in Johannesson & Johannesson (1990, p. 95).

Type
Short Communications
Information
Journal of the Marine Biological Association of the United Kingdom , Volume 73 , Issue 1 , February 1993 , pp. 250
Copyright
Copyright © Marine Biological Association of the United Kingdom 1993

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References

Grahame, J., Mill, P. J., Double, M., & Hull, S. L., 1992. Patterns of variation in Aat-1 allele frequencies in rough periwinkles (Littorina) suggest similar selection regimes rather than conspecificity. Journal of the Marine Biological Association of the United Kingdom, 72, 499–502.CrossRefGoogle Scholar
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