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 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.

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.

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

Chromosome banding in salmonid fish: nucleolar organizer regions in Salmo and Salvelinus

1985 ◽  
Vol 27 (4) ◽  
pp. 433-440 ◽  
Author(s):  
Ruth Phillips ◽  
Peter E. Ihssen
Keyword(s):  
Atlantic Salmon ◽  
Brown Trout ◽  
Brook Trout ◽  
Chromosome Banding ◽  
Lake Trout ◽  
Nucleolar Organizer ◽  
Nucleolar Organizer Regions ◽  
Banding Patterns ◽  
Single Chromosome ◽  
Secondary Constrictions

Chromosome banding patterns obtained by silver staining (Ag-NORs) were analyzed in three species of Salmo (rainbow, brown trout, and Atlantic salmon) and three species of Salvelinus (brook trout, lake trout, and arctic char). In rainbow trout and Atlantic salmon the Ag-NORs were found at the secondary constrictions of a single chromosome pair, while in brown trout the Ag-NORs were found on the short arms of one or two of the two longest subtelocentric or acrocentric chromosome pairs. The location of the Ag-NORs was multichromosomal in the three Salvelinus species, occurring on one or both members of four to six different chromosome pairs in different individuals. The Ag-NOR sites were on the short arms of some acrocentric pairs and at the telomeres of other acrocentric pairs and one or two metacentric pairs. Chromomycin A3 positive bands were found at the same sites as the Ag-NORs in all species. In the species with multichromosomal location of Ag-NORs, polymorphisms in the size and location of the NORs were extremely common, so that almost every individual fish had a different pattern of Ag-NOR sites.Key words: banding, Salmo, Salvelinus, Ag-NORs, polymorphisms, nucleolar organizer.

HYBRIDIZATION BETWEEN THE NEARCTIC ANOPHELES PUNCTIPENNIS AND THE PALEARCTIC ANOPHELES ATROPARVUS

1977 ◽  
Vol 19 (2) ◽  
pp. 265-270
Author(s):  
Richard D. Kreutzer
Keyword(s):  
Salivary Gland ◽  
Chromosome Banding ◽  
Interspecific Crosses ◽  
Inverted Region ◽  
Banding Patterns ◽  
X Chromosomes ◽  
Chromosomal Homology ◽  
Anopheles Atroparvus ◽  
Palearctic Species ◽  
High Level

Interspecific crosses were made between the Palearctic species Anopheles atroparvus Van Thiel and the Nearctic species A. punctipennis Say. Except for most of the X chromosomes, an inverted region in 3R, and band intensity differences the salivary gland chromosome banding patterns are the same in both species. Despite this high level of chromosomal homology very little synapsis of identically banded regions was observed in hybrid complements. This asynapsis and the fact that no adults were produced from either the cross or the reciprocal indicate that there are significant genetic differences between the species.

Taxonomic status of the black fly Prosimulium italicum Rivosecchi (Diptera: Simuliidae) based on genetic evidence

Zootaxa ◽  
2018 ◽  
Vol 4377 (2) ◽  
pp. 280 ◽  
Author(s):  
MATÚŠ KÚDELA ◽  
PETER H. ADLER ◽  
TATIANA KÚDELOVÁ
Keyword(s):  
Mitochondrial Dna ◽  
Central Europe ◽  
Sex Chromosomes ◽  
Chromosome Banding ◽  
Taxonomic Status ◽  
Northern Europe ◽  
Chromosome Polymorphism ◽  
Species Status ◽  
Banding Patterns ◽  
Black Fly

The black fly Prosimulium italicum Rivosecchi, distributed in the Apennines and Sicily, was described as a subspecies of Prosimulium hirtipes (Fries), based on a few morphological details. It subsequently was considered conspecific with P. hirtipes and the name was synonymized. Analyses of polytene chromosome banding patterns and sequences of mitochondrial DNA (COI and COII) revealed deep genetic divergence between P. italicum from Italy and P. hirtipes from northern and central Europe and confirmed the species status of P. italicum. Populations of P. italicum either lack chromosomal inversion IS-9 or carry it as an X-chromosome polymorphism, whereas all analyzed populations of P. hirtipes (Slovakia, Sweden, England, and Scotland) are fixed for IS-9. The average K2P genetic distance was 3.7% between P. italicum and P. hirtipes from northern Europe (Sweden) and 4.3 % between P. italicum and P. hirtipes from central Europe (Slovakia). Cytogenetic analysis showed the presence of two cytoforms of P. hirtipes (‘A’ in Sweden and Slovakia and ‘B’ in England and Scotland) and two cytoforms of P. italicum (‘A’ in Sicily and ‘B’ in Campania and Basilicata), all of which differ in their sex chromosomes and autosomal polymorphisms, suggesting that P. hirtipes and P. italicum might each be a complex of cryptic species. 

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