Chromosomal polymorphism of Bufo bufo: Karyotype and C-banding pattern of B. b. verrucosissima

Genetica ◽  
1982 ◽  
Vol 59 (2) ◽  
pp. 93-98 ◽  
Author(s):  
V. J. Birstein ◽  
A. L. Mazin
Keyword(s):  
Banding Pattern ◽  
Chromosomal Polymorphism ◽  
Bufo Bufo ◽  
C Banding

Bearing of Chromosome C-banding patterns on the Classification of Eurasian Toads of the Bufo bufo Complex

1985 ◽  
Vol 6 (1) ◽  
pp. 23-33 ◽  
Author(s):  
Yoshiko Kohsaka ◽  
Takeshi Seto ◽  
Leo J. Borkin ◽  
Masafumi Matsui
Keyword(s):  
Banding Pattern ◽  
Constitutive Heterochromatin ◽  
Bufo Bufo ◽  
Pericentric Heterochromatin ◽  
Published Data ◽  
Banding Patterns ◽  
Homologous Chromosomes ◽  
C Banding ◽  
Systematic Relationships

AbstractDistribution of NORs and C-spots in the karyotypes was compared among six forms of the Bufo bufo complex, i.e. B. j. japonicus, B. j. formosus, B. torrenticola and B. gargarizans miyakonis from Japan, and B. b. bufo and B. b. verrucosissimus from USSR. All forms invariably possessed NORs on 6q. All the 11 pairs of homologous chromosomes had constitutive heterochromatin on the centromere region in every form of toad examined. Further, each form had pericentric heterochromatin on 1p and telomeric one on 6q. Pairs 8 and 9 lacked C-bands except the centromeric spot in every form. Other chromosomes revealed unique C-spots specific to each form, and each form could be characterized from others by the banding pattern. Comparisons of the C-banding patterns of the three forms obtained with those of the published data revealed several discrepancies, but most of them were attributed to the unlike standard in recognizing spots by the different authors. Although the C-banding pattern is suggested to have some taxonomic value, systematic relationships among the six forms cannot be directly estimated by the analyses of banding patterns.

C-Banding Pattern and Satellite DNA Localization on the Chromosomes ofOryzomys Flavescens(Rodentia, Cricetidae)

Caryologia ◽  
1988 ◽  
Vol 41 (3-4) ◽  
pp. 323-328 ◽  
Author(s):  
L. Vidal Rioja ◽  
T.G. de Fronza ◽  
R. Wainberg ◽  
N. Brum-Zorrilla ◽  
F. Wallace ◽  
...  
Keyword(s):  
Banding Pattern ◽  
Satellite Dna ◽  
C Banding

scholarly journals Chromosomal polymorphism in 12 populations of Mikania micrantha (Compositae)

1999 ◽  
Vol 22 (3) ◽  
pp. 433-444 ◽  
Author(s):  
Eliane M.D. Maffei ◽  
M.A. Marin-Morales ◽  
P.M. Ruas ◽  
C.F. Ruas ◽  
N.I. Matzenbacher
Keyword(s):  
Chromosomal Polymorphism ◽  
The United States ◽  
B Chromosomes ◽  
Mitotic Chromosomes ◽  
Mikania Micrantha ◽  
Perennial Weed ◽  
C Banding ◽  
Size Number ◽  
Chromosomal Differentiation ◽  
First Time

Mikania micrantha is a climbing perennial weed of the family Asteraceae, with a vast distribution from South America to south of the United States. This species is widely distributed throughout Brazil, where it shows little morphological variation. Mitotic chromosomes of 12 populations of M. micrantha derived from several Brazilian sites were studied using Feulgen staining and C-banding. The populations included eight diploid (2n = 36 and 42) and four tetraploid (2n = 72) cytotypes. Chromosome numbers of 2n = 36 and 2n = 42 are reported for the first time for M. micrantha. These populations had a secondary constriction in the middle of the larger arm of chromosome pair 1, following the same pattern described for all Mikania species analyzed so far. Numerical and structural variation of the chromosomes was quite common among the karyotypes and nearly all cytotypes differed from each other in some aspect. Most of the chromosomal differentiation may be attributed to inversions and addition or deletion of DNA fragments. C-banding, applied to three of the 12 populations, also revealed polymorphism in the distribution of heterochromatin. Additionally, one to 14 supernumerary or B-chromosomes were observed. The Bs were detected in six of the 12 populations and varied in size, number, and structure among karyotypes and also among cells of the same root meristem. The B chromosomes were also heterochromatic, showing a C-banding pattern similar to the A chromosomes, and suggesting that they may be derived from the chromosomes of the A complement.

TRIPLOIDY IN NATURAL POPULATIONS OF THE BLACK FLY CNEPHIA MUTATA (MALLOCH)

1959 ◽  
Vol 37 (4) ◽  
pp. 571-589 ◽  
Author(s):  
V. R. Basrur ◽  
K. H. Rothfels
Keyword(s):  
Salivary Gland ◽  
Banding Pattern ◽  
Natural Populations ◽  
Chromosomal Polymorphism ◽  
Genetic Exchange ◽  
Black Flies ◽  
Female Progeny ◽  
Southern Ontario ◽  
Black Fly ◽  
Standard Sequence

Populations of Cnephia mutata in southern Ontario contain both diploid and triploid individuals. The diploid form is bisexual and lacks chromosomal polymorphism except for a rearrangement involved in its cytological sex determining mechanism. The triploids are parthenogenetic; they produce female progeny only and are highly heterozygous for inversions. The banding pattern of the salivary gland chromosomes of diploids and triploids is very similar; the identical standard sequence occurs in both. The complete lack of autosomal inversions in diploids contrasted with their abundance in triploids indicates that effective genetic exchange does not occur between the two forms; they are reproductively completely isolated, although opportunity for cross-mating would seem to exist. The origin of polyploid parthenogenetic forms in black flies is discussed and the view is favored that they are autopolyploid and automictic.

scholarly journals Giemsa C-banding pattern in some cultivars of Trichosanthes dioica Roxb.

CYTOLOGIA ◽  
1987 ◽  
Vol 52 (3) ◽  
pp. 419-423 ◽  
Author(s):  
Dilip De Sarker ◽  
Kalyan B. Datta
Keyword(s):  
Banding Pattern ◽  
C Banding ◽  
Trichosanthes Dioica

Karyotype and C-banding Pattern of the Domestic Geese Anser anser Populations (Aves: Anatidae) in Egypt

2014 ◽  
Vol 62 (1) ◽  
pp. 47-56 ◽  
Author(s):  
Adel A. Basyouny Shahin ◽  
Abdel Tawab Mohammed Ata ◽  
Anwaar S. Mohammed Abu Shnaf
Keyword(s):  
Banding Pattern ◽  
Anser Anser ◽  
C Banding

The origin of wheat chromosomes 4A and 4B and their genome reallocation

1983 ◽  
Vol 25 (3) ◽  
pp. 210-214 ◽  
Author(s):  
J. Dvořák
Keyword(s):  
Triticum Aestivum ◽  
Banding Pattern ◽  
The Other ◽  
Evolutionary Lineage ◽  
C Banding ◽  
B Genome ◽  
A Genome

Triticum aestivum chromosome "4A" is, like the B genome chromosomes, extensively heterochromatic while the remaining six A genome chromosomes are not. In the presence of the Ph gene it does not pair with any chromosome of einkorn wheats, T. monococcum and T. urartu, the source of the A genome. It is shown here that the same chromosome is also present in T. timopheevii which represents the other evolutionary lineage of wheats. The "4A" chromosomes of T. timopheevii and T. aestivum pair poorly with each other, like the B genome chromosomes of the two lineages, while the remaining A genome chromosomes, except for one arm, pair relatively well. Hence, in both lineages chromosome "4A" has the attributes of the B genome chromosomes, not of the A genome chromosomes. The C-banding pattern of chromosome "4A" of T. aestivum and T. timopheevii closely resembles the C-banding pattern of a chromosome of T. speltoides and less closely chromosome 4B1 of T. sharonense. On the basis of this and other evidence it is concluded that this chromosome was contributed by a species of the section Sitopsis and, consequently, belongs to the B genome. Additionally, there is evidence that the chromosome that was originally designated "4B" belongs to the A genome.

Karyotype and C-banding pattern of mitotic chromosomes in alfalfa, Medicago sativa L.

1995 ◽  
Vol 114 (5) ◽  
pp. 451-453 ◽  
Author(s):  
E. Falistocco ◽  
M. Falcinelli ◽  
F. Veronesi
Keyword(s):  
Medicago Sativa ◽  
Banding Pattern ◽  
Mitotic Chromosomes ◽  
C Banding ◽  
Medicago Sativa L
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