[Evidence of species specific pericentric inversion in the karyotype of the midge Chironomus balatonicus].
Pericentric inversions do not play any important role in chromosomal rearrangements in the karyotype evolution of the genus Chironomus. However, a unique case of the fixed pericentric inversion was discovered in chromosome 2 of Chironomus balatonicus--one of the members of plumosus-species group (Kikhadze et al., 1996a; Golygina et al., 1996). According to morphological criteria, a centromere band on chromosome 2 changed its position in Ch. balatonicus. The cloned H3-SauDNA, specific for centromeres in plumosus group, was in situ hybridized with Ch. balatonicus polytene chromosomes, and thus a real change in the centromere position was proved to be a result of pericentric inversion. This was also confirmed after differential C-staining.
Kiknadze
I I
II
Institute of Cytology and Genetics, Siberian Branch of RAS, Novosibirsk. kiknadze@bionet.nsc.ru
Golygina
V V
VV
Filippova
M A
MA
D000818:Animals; D002683:Chironomidae / Q000235:genetics*; D007446:Chromosome Inversion; D007621:Karyotyping; D013045:Species Specificity