Abstract
The gene coding for mannose phosphate isomerase (MPI) has been found to be sex-linked in Common Lizard (Lacerta vivipara) samples from Russia to France. Both sex chromosomes can express one or two codominant alleles. The results are in agreement with the Z1Z2W heteromorphic karyotype described in L. vivipara populations from central France. Allozyme frequencies can strongly vary between regions; in the Austrian population sampled, an allele that is rare or absent elsewhere has been fixed on chromosome W. The possibility is raised that habitat selection involving MPI allozymes will be demonstrated with suitable sampling, while the existence of endocyclic selection has been substantiated. The data suggest that the Z1Z2W sex determination system is older than implied by the literature and possibly fixed in the whole species, but it is concluded that another sex-linked gene than MPI has been instrumental in fixing the translocation involved.
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Salvidio, S., Pasteur, G., Heulin, B. et al. Natural selection and geographical variation in a known sex-linked gene of the Common Lizard in Europe. Implications for chromosomal evolution. Heredity 64, 131–138 (1990). https://doi.org/10.1038/hdy.1990.17
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DOI: https://doi.org/10.1038/hdy.1990.17
