Abstract
The satellite DNA family pDoP102 is species specific for the cave cricket Dolichopoda schiavazzii, an endemic species of mainland and insular Tuscany. It consists of numerous tandemly arranged repeats, 102 bp in length, and evolved most probably after cladogenesis of D. schiavazzii from the D. baccettii-aegilion group within the last 2.3 ± 0.8 million years. A sequence comparison of 31 clones (53 repetition units) from three isolated populations reveals a very high degree of sequence homogeneity within the species with no evidence for any specific population features. This appears to be in contrast to the results of allozyme analyses which account for a relatively old evolutionary divergence of the Elba island population from the mainland ones. Since the assumption of actual gene flow and recent colonization is rejected, the observed sequence homogeneity is hypothesized to be maintained by recombination processes preventing fixation of newly introduced mutations on pDoP102 sequence clusters.
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Abbreviations
- bp:
-
base pair(s)
- D.:
-
Dolichopoda
- nt:
-
nucleotide(s)
- sat:
-
satellite
- sc:
-
single copy
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Bachmann, L., Venanzetti, F. & Sbordoni, V. Characterization of a species-specific satellite DNA family of Dolichopoda schiavazzii (Orthoptera, Rhaphidophoridae) cave crickets. J Mol Evol 39, 274–281 (1994). https://doi.org/10.1007/BF00160151
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DOI: https://doi.org/10.1007/BF00160151