G-banding of germ line limited chromosomes in Acricotopus lucidus (Diptera, Chironomidae)

Preferential pairing in the germ line limited chromosomes of Acricotopus lucidus (Diptera, Chironomidae)

“…This corroborates earlier observations (Staiber, 1988) that, during germ line elimination in both testes of a young first instar larva, it is not always the same Ks that are eliminated.…”

“…Only metaphases I were examined. In A. lucidus the number of K bivalents ranged from 6 to 16 (Staiber, 1988). It is probable that oniy a proportion of all Ks with chromosome alterations was detected, because only mutated Ks with conspicuous changes in the positions of centromeres, or of characteristic G-bands, or with alterations to the total length of chromosomes or chromosome arms, could be recognized as such.…”

“…In the Cecidomyiid Wachtliella persicariae, the Ks are indispensable for normal development of germ cells in both sexes (Geyer-Duszyñska, 1966 and combinations form the gonial K complements (Staiber, 1988). In gomal metaphases each K type may be present once or twice, some Ks are also present on three occasions, and a special K type, K4, up to five times.…”

“…Hypotonic treatment of gonads, slide preparation and G-banding followed the methods described in Staiber(1988).…”

G- and C-banding of Chromosomes in Baicalasellus angarensis (Crustacea, Isopoda).

“…We found that B. angarensis chromosomes prepared by the traditional method cannot be G-banded, in contrast to embryonic chromosomes prepared by "mammalian" technique . The similar approaches have been used in the investigations in which successful G-band results were demonstrated (Muramoto 1975, Webb and Westerman 1978, Angus 1982, Staiber 1988, Wand and Kao 1988, Yang and Zhang 1988. And, generally speaking, G-banding could easily be shown on the large chromosomes, as in isopods, and chromosomes in early stage of condensation.…”