Rearrangement hotspots in the sex chromosome of the Palearctic black fly Simulium bergi (Diptera, Simuliidae)

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Adler P. H. , Yildirim A. , Onder Z., Tasci G. T. , Duzlu Ö. , Arslan M. O. , ...Daha Fazla

COMPARATIVE CYTOGENETICS, cilt.10, ss.295-310, 2016 (SCI İndekslerine Giren Dergi) identifier identifier identifier

  • Cilt numarası: 10
  • Basım Tarihi: 2016
  • Doi Numarası: 10.3897/compcytogen.v10i2.8855
  • Sayfa Sayıları: ss.295-310


An extreme example of nonrandom rearrangements, especially inversion breaks, is described in the polytene chromosomes of the black fly Simulium bergi Rubtsov, 1956 from Armenia and Turkey. A total of 48 rearrangements was discovered, relative to the standard banding sequence for the subgenus Simulium Latreille, 1802. One rearrangement, an inversion (IIS-C) in the short arm of the second chromosome, was fixed. Six (12.5%) of the rearrangements were autosomal polymorphisms, and the remaining 41 (85.4%) were sex linked. More than 40 X- and Y-linked rearrangements, predominantly inversions, were clustered in the long arm of the second chromosome (IIL), representing about 15% of the total complement. The pattern conforms to a nonrandom model of chromosome breakage, perhaps associated with an underlying molecular mechanism.