Tandemly repeated satellite DNA ofDolichopoda schiavazzii: A test for models on the evolution of highly repetitive DNA
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Three specific satellite DNA families can be detected in the genome of the cave cricketDolichopoda schiavazzii. ThepDoP102 and thepDsPv400 families are species specific forD. schiavazzii; thepDoP500 family is probably present in allDolichopoda species. The three satellite DNA families were characterized from individuals of three isolated populations ofD. schiavazzii with respect to nucleotide sequence, sequence complexity, sequence variability, and copy number. This unique data set on satellite DNAs of D. schiavazzii seems to allow one to test the significance of theoretical approaches to the mode of evolution of noncoding, tandemly arranged satellite DNA. At least for satellite DNAs ofD. schiavazzii two clear trends were observed: (1) sequence variability increases with copy number and (2) the repeat length decreases with copy number. The first trend is in good agreement with the theory but the second is not. Thus, a revision of the models is proposed.
Key wordsConcerted evolution Noncoding DNA Recombination Sequence homogenization Unequal crossing-over
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- Beridze T (1986) Satellite DNA. Springer Verlag, BerlinGoogle Scholar
- Dover GA, Brown S, Coen E, Dallas J, Strachan T, Trick M (1982) The dynamics of genome evolution and species differentiation. In: Dover GA, Flavell RB (eds) Genome evolution. Academic Press, pp 343–372Google Scholar
- Dover GA, Tautz D (1986) Conversion and divergence in multigene families: alternatives to selection and drift. Philos Trans R Soc Lond Ser B 312:275–289Google Scholar
- Kimura M (1980) A simple method for estimating evolutionary rate of base substitutions through comparative studies of nucleotide sequences.J Mol Biol 16:111–120Google Scholar
- Lindsley DL, Sandler L (1977) The genetic analysis of meiosis in femaleDrosophila melanogaster. Philos Trans R Soc Lond 277B: 295–312Google Scholar
- Lohe AR, Roberts P (1988) Evolution of satellite DNA sequences inDrosophila. In: Verma RS (ed) Heterochromatin. Cambridge University Press, Cambridge, pp 148–186Google Scholar
- Mather K (1939) Crossing over and heterochromatin in chromosomes ofDrosophila melanogaster. Genetics 24:413–435Google Scholar
- Minasi MG, Allegrucci G, Sbordoni V (1993) Population genetic structure in the cave cricketDolichopoda schiavazzii. 55 Congresso Unione Zoologica Italiana. Riassunti:25Google Scholar
- Preiss A, Hartley DA, Artavanis-Tsakonas S (1988) Molecular genetics of enhancer of split, a gene required for embryonic neural development inDrosophila. EMBO J 12:3917–3927Google Scholar
- Sambrook J, Fritsch ET, Maniatis T (1989) Molecular cloning. A laboratory manual. Cold Spring Harbor Laboratory, Cold Spring Harbor, NYGoogle Scholar
- Sbordoni V, Allegrucci G, Cesaroni D, Cobolli Sbordoni M, De Mattheis E (1985) Genetic structure of populations and species ofDolichopoda cave crickets: evidence of peripatric divergence. In: Sbordoni V (ed) Contact zones and speciation. Boll Zool 52:139–156Google Scholar