Chromosome banding pattern conservatism in birds and nonhomology of chromosome banding patterns between birds, turtles, snakes and amphibians

Chromosoma ◽  
1975 ◽  
Vol 50 (1) ◽  
Author(s):  
A.Dean Stock ◽  
GregoryA. Mengden
Keyword(s):  
Banding Pattern ◽  
Chromosome Banding ◽  
Banding Patterns

CHROMOSOME STRUCTURE IN CHILOCORUS (COLEOPTERA: COCCINELLIDAE). II. THE ASYNCHRONOUS REPLICATION OF CONSTITUTIVE HETEROCHROMATIN

1976 ◽  
Vol 18 (1) ◽  
pp. 85-91 ◽  
Author(s):  
T. J. Ennis
Keyword(s):  
Chromosome Banding ◽  
Chromosome Structure ◽  
Constitutive Heterochromatin ◽  
Chromosome Replication ◽  
Data Models ◽  
Late Replication ◽  
Banding Patterns ◽  
Asynchronous Replication ◽  
Chilocorus Stigma

Chromosome replication has been analysed in four species of Chilocorus. In C. orbus Csy., C. tricyclus Smith, and C. hexacyclus Smith, centric regions of all chromosomes are last to replicate, preceded in order by heterochromatic arms and euchromatic arms. In C. stigma Say, very late replication of centric regions can be detected only in otherwise wholly euchromatic chromosomes (= monophasics); in chromosomes with one arm heterochromatic (= diphasics), these arms are last to replicate. Based on pachytene bivalent morphology and chromosome banding patterns, and supported by autoradiographic data, models are presented for the general organisation of Chilocorus chromosomes. All chromosomes in the first three species are subdivided into euchromatic arm, centric heterochromatin, and either a second euchromatic arm (monophasics) or a heterochromatic arm (diphasics). Chilocorus stigma diphasics apparently lack distinct centric organisation, and are therefore divided into euchromatic and heterochromatic arms only.

Description of chromosome banding patterns by band transition sequences

2008 ◽  
Vol 15 (5) ◽  
pp. 418-429 ◽  
Author(s):  
Claes Lundsteen ◽  
Erik Granum
Keyword(s):  
Chromosome Banding ◽  
Banding Patterns ◽  
Band Transition

Rye C-banding patterns and meiotic stability of hexaploid triticale (× Triticosecale) selections differing in kernel shriveling

Genome ◽  
1990 ◽  
Vol 33 (5) ◽  
pp. 686-689 ◽  
Author(s):  
Charles M. Papa ◽  
R. Morris ◽  
J. W. Schmidt
Keyword(s):  
Secale Cereale ◽  
Chromosome Banding ◽  
Agronomic Performance ◽  
Hexaploid Triticale ◽  
Kernel Development ◽  
Banding Patterns ◽  
C Banding ◽  
Meiotic Stability ◽  
Metaphase I

Two winter hexaploid triticale populations derived from the same cross were selected on the basis of grain appearance and agronomic performance. The five lines from 84LT402 showed more kernel shriveling than the four lines from 84LT401. The derived lines were analyzed for aneuploid frequencies, rye chromosome banding patterns, and meiotic stability to detect associations with kernel development. The aneuploid frequencies were 16% in 84LT401 and 18% in 84LT402. C-banding showed that both selection groups had all the rye chromosomes except 2R. The two groups had similar telomeric patterns but differed in the long-arm interstitial patterns of 4R and 5R. Compared with lines from 84LT402, those from 84LT401 had significantly fewer univalents and rod bivalents, and more paired arms at metaphase I; fewer laggards and bridges at anaphase I; and a higher frequency of normal tetrads. There were no significant differences among lines within each group for any meiotic character. Since there were no differences within or between groups in telomeric banding patterns, the differences in kernel shriveling and meiotic stability might be due to genotypic factors and (or) differences in the interstitial patterns of 4R and 5R. By selecting plump grains, lines with improved kernel characteristics along with improved meiotic stability are obtainable.Key words: triticale, meiotic stability, C-banding, Secale cereale, heterochromatin.

scholarly journals Chromosome banding pattern in a polymorphic population of Sorex araneus from northeastern Finland

Hereditas ◽  
2009 ◽  
Vol 76 (2) ◽  
pp. 305-314 ◽  
Author(s):  
LIISA HALKKA ◽  
O. HALKKA ◽  
U. SKARÉN ◽  
VERONICA SÖDERLUND
Keyword(s):  
Banding Pattern ◽  
Chromosome Banding ◽  
Sorex Araneus

scholarly journals Chromosome Banding Patterns and Idiogram of the Armenian Hamster, Cricetulus migratorius

CYTOLOGIA ◽  
1977 ◽  
Vol 42 (1) ◽  
pp. 65-72 ◽  
Author(s):  
K. S. Lavappa
Keyword(s):  
Chromosome Banding ◽  
Banding Patterns

The interrelationships of chromosome banding patterns in procyonids, viverrids, and felids

1975 ◽  
Vol 15 (5) ◽  
pp. 306-331 ◽  
Author(s):  
D.H. Wurster-Hill ◽  
C.W. Gray
Keyword(s):  
Chromosome Banding ◽  
Banding Patterns

Chromosome Banding Patterns in Squirrel Monkeys (Saimiri sciureus)

1974 ◽  
Vol 3 (2) ◽  
pp. 120-137 ◽  
Author(s):  
N.S.F. Ma ◽  
T.C. Jones ◽  
R.W. Thorington ◽  
R.W. Cooper
Keyword(s):  
Chromosome Banding ◽  
Squirrel Monkeys ◽  
Saimiri Sciureus ◽  
Banding Patterns

scholarly journals Involement of an acrosinlike proteinase in the sulfhydryl-induced degradation of rabbit sperm nuclear protamine

1980 ◽  
Vol 85 (1) ◽  
pp. 116-121 ◽  
Author(s):  
BR Zirkin ◽  
TSK Chang ◽  
J Heaps
Keyword(s):  
Proteolytic Activity ◽  
Banding Pattern ◽  
Basic Protein ◽  
Polyacrylamide Gels ◽  
Banding Patterns ◽  
Pattern Characteristic ◽  
Sperm Nuclei ◽  
Triton X ◽  
Esterase Inhibitor

Previous studies demonstrated that proteolytic activity is associated with isolated rabbit sperm nuclei and is responsible for the degradation of nuclear protamine that occurs during thiol-induced in vitro decondensation of the nuclei (Zirkin and Chang, 1977; Chang and Zirkin, 1978). In this study, we present the results of experiments designed to characterize this proteolytic activity. Basic protein isolated from rabbit sperm nuclei incubated with 5 mM dithiothreitol (DTT) and 1 percent Triton X-100 for increasing periods of time exhibited progressively faster migrating bands on acid-urea polyacrylamide gels, reflection the progressive degradation of protamine. Ultimately, a specific and characteristic peptide banding pattern resulted. When sperm nuclei were treated with the esterase inhibitor nitrophenyl-p-guanidino benzoate (NPGB) to inhibit the nuclear-associated proteolytic activity and then incubated with one of several exogenous proteinases in addition to DTT and Triton X-100, characteristic peptide banding patterns were seen for each exogenous proteinase employed. For trypsin, chymotrypsin, pronase, and papain, the peptide banding patterns differed from one another and from the pattern characteristic of protamine degradation by the nuclear-associated proteinase. By contrast, when rabbit acrosin served as the exogenous proteinase, the peptide banding pattern seen was identical to the pattern characteristic of the nuclear-associated proteinase. These results demonstrate directly that the proteinase associated with rabbit sperm nuclei and involved in sperm nuclear decondensation in vitro is acrosinlike.

A comparison of polytene chromosomes in salivary glands and orbital bristle trichogen cells in Ceratitis capitata

Genome ◽  
1991 ◽  
Vol 34 (2) ◽  
pp. 215-219 ◽  
Author(s):  
A. Zacharopoulou ◽  
K. Bourtzis ◽  
Ph. Kerremans
Keyword(s):  
Salivary Gland ◽  
Salivary Glands ◽  
Banding Pattern ◽  
Ceratitis Capitata ◽  
Polytene Chromosomes ◽  
Biological Significance ◽  
Fruit Fly ◽  
Banding Patterns ◽  
Homologous Chromosomes ◽  
Different Tissues

The banding patterns of polytene chromosomes in different tissues of the Mediterranean fruit fly, Ceratitis capitata, vary to such an extent that homologous chromosomes cannot be recognised. However, analyses of autosomal breakpoints in several translocation strains allowed chromosomes from the two tissues to be aligned despite their difference in banding pattern. These results were discussed, considering the different hypotheses of the origin and biological significance of polytene chromosome bands.Key words: polytene chromosomes, salivary gland chromosomes, orbital bristle trichogen cell chromosomes, Ceratitis capitata.

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