A new karyotype and chromosomal banding pattern inNannospalax ehrenbergi(Nehring, 1898) (Rodentia: Spalacidae) from southeast Anatolia, Turkey

The polytene chromosomes of four closely related Eusimulium (Roubaud) morphospecies from Europe have been examined. These are Eusimulium vernum (Macquart), E. costatum (Friedrichs), E. cryophilum (Rubtzov), and E. carpathicum (Knoz). Interspecific comparisons indicate that vernum and costatum are homosequential in chromosomal banding pattern; however, costatum does differ from vernum in possessing a conspicuous chromocenter. Both species may have B chromosomes, but these are not identical. Three kinds of vernum populations are found: pure X0Y0 (with undifferentiated X and Y chromosomes), pure X0Y1 (with males heterozygous for IIS-1 ve), and mixed X0Y0/X0Y1 populations. Only two European vernum cytotypes are indicated. Eusimulium cryophilum and E. carpathicum share a suite of autosomal polymorphisms as well as a fixed paracentric (IL-2) and a fixed pericentric (IIIP-1) inversion with respect to the vernum "Knebworth" standard. They differ from one another by three fixed inversions (IIS-1, IIIS-3, and IIIS-4). It is argued that at least two siblings, cryophilum A and cryophilum B, exist within cryophilum s.l. Sections 86B and 91C in the long arm of chromosome III appear to be extremely labile for breakage and reunion phenomena because several tandem or near-tandem inversions occur in this area. A cytophylogeny of the taxa under study is presented.

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Isolation and Molecular Characterization of Escherichia coli from Goat of Apparently Healthy and Clinical Cases

Bangladesh Journal of Microbiology ◽

10.3329/bjm.v27i1.9162 ◽

1970 ◽

Vol 27 (1) ◽

pp. 14-17 ◽

Cited By ~ 1

Author(s):

Abu Sayeed M Abdullah ◽

M Shahidur Rahman Khan ◽

Munirul Alam ◽

Farjana Haq ◽

Jayedul Hassan

Keyword(s):

Banding Pattern ◽

Gel Electrophoresis ◽

Pulsed Field Gel Electrophoresis ◽

Pulsed Field ◽

E Coli ◽

Clonal Origin ◽

Chromosomal Banding ◽

Apparently Healthy ◽

Clinical Cases

The prevalence of E. coli in faecal sample of apparently healthy and clinical cases of goats was investigated. A total of 150 samples of which 90 from clinical cases and 60 from apparently healthy goat were examined. Among the samples examined, 65(72.22%) and 25(41.67%) were found to be positive for E. coli in clinical and healthy cases respectably. The banding pattern of chromosome of isolated E. coli from goats of apparently healthy and clinical cases was also carried out by Pulsed Field Gel Electrophoresis through which the clonal relation between the isolated E. coli was studied. Chromosomal banding pattern of E. coli from goat of apparently healthy cases from same and different location were found identical which indicates similar clonal origin of E. coli. On the other hand, banding pattern of E. coli chromosome from diseased goat of different location were found dissimilar which may be either due to difference in origin of E. coli clone or phage encoded chromosome which can muted E. coli isolates. Thus it can be concluded that Pulsed Field Gel Electrophoresis profile varies according to severity of the disease.Keywords: Goat; E. coli; Isolation; Molecular CharacterizationDOI: http://dx.doi.org/10.3329/bjm.v27i1.9162BJM 2010; 27(1): 14-17

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CHROMOSOMAL ANALYSIS OF PEROMYSCUS GRATUS (CRICETIDAE) OF TECAMACHALCO, PUEBLA, MEXICO

BIOCYT Biología Ciencia y Tecnología ◽

10.22201/fesi.20072082.2020.13.72907 ◽

2020 ◽

Vol 13 ◽

Author(s):

Jesús Martínez-Vázquez ◽

María De los Ángeles Vela-Montero ◽

Rosa María González-Monroy

Keyword(s):

Bone Marrow ◽

Banding Pattern ◽

Diploid Number ◽

Constitutive Heterochromatin ◽

Sex Chromosome ◽

Chromosomal Analysis ◽

Barium Hydroxide ◽

Chromosome X ◽

Fundamental Number ◽

Chromosomal Banding

The description was made of the karyotype of Peromyscus gratus (Cricetidae) in the municipality of Tecamachalco, Puebla. Performing the technique of bone marrow extraction, in the obtention of chromosome, G bands was used Trypsin and for C bands a Barium Hydroxide solution was employed. P. gratus presents a diploid number of 2n = 48 and a fundamental number of NF = 54, the autosomes correspond to one metacentric, one submetacentric, two subtelocentric and 19 pairs telocentric from large to small. The sex chromosome X was subtelocentric and the Y was submetacentric unlike other populations of the species. The chromosomal banding pattern G was obtained. As for chromosome C banding, it was found that the constitutive heterochromatin was in the centromeric regions of the chromosomes.

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A Gene in Drosophila That Produces a New Chromosomal Banding Pattern

Science ◽

10.1126/science.137.3534.993.b ◽

1962 ◽

Vol 137 (3534) ◽

pp. 993-994

Author(s):

Louis Levine ◽

Leigh Van Valen

Keyword(s):

Banding Pattern ◽

Chromosomal Banding

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C-Banded Karyotype and Cytotaxonomy of Mertensiella caucasica (WAGA, 1876) (Caudata: Salamandridae)

Amphibia-Reptilia ◽

10.1163/156853882x00022 ◽

1982 ◽

Vol 3 (4) ◽

pp. 303-307 ◽

Cited By ~ 1

Author(s):

Matilde Ragghianti ◽

Stefania Bucci-Innocenti ◽

Giorgio Mancino

Keyword(s):

Chromosome Number ◽

Banding Pattern ◽

Related Form ◽

C Banding ◽

Structural Character ◽

Chromosomal Banding

AbstractChromosome number, karyotype and chromosomal banding pattern of Mertensiella caucasica were studied in differentially stained mitotic preparations. The main feature of the C-banded appearance concerns the centromere regions, which are heavily stained by the Giemsa and are outlined by proximal C-bands. This morpho-structural character seems to be peculiar of the genome of M. caucasica, when compared with the C-banding pattern shown by the chromosomes of Salamandra, considered the most closely related form. Therefore, a preliminary cytotaxonomic survey seems to support the opinion that the Caucasian salamander can be referred to a well defined genus Mertensiella rather than a subgenus of Salamandra.

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Chromosomal banding pattern and idiogram of the cotton rat, Sigmodon arizonae (Rodentia, Muridae)

Chromosoma ◽

10.1007/bf00284076 ◽

1973 ◽

Vol 41 (1) ◽

Cited By ~ 4

Author(s):

EarlG. Zimmerman ◽

DeniseA. Sihvonen

Keyword(s):

Banding Pattern ◽

Cotton Rat ◽

Chromosomal Banding

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An intra- and inter-island study of the polytene chromosomes of Simulium exasperans (Diptera: Simuliidae)

Canadian Journal of Zoology ◽

10.1139/z04-051 ◽

2004 ◽

Vol 82 (5) ◽

pp. 808-816 ◽

Cited By ~ 1

Author(s):

Mike Spironello ◽

Fiona F Hunter

Keyword(s):

Sex Chromosomes ◽

Banding Pattern ◽

Preliminary Data ◽

Chromosome Banding ◽

Polytene Chromosomes ◽

Heterozygote Advantage ◽

Chromosomal Banding ◽

Males And Females ◽

Interspecific Comparisons ◽

First Time

The polytene chromosome banding pattern of Simulium exasperans (Craig, 1987) is described for the first time. Three populations of S. exasperans from Moorea and Tahiti were examined cytologically. Interspecific comparisons revealed that S. exasperans is homosequential in chromosomal banding pattern to Simulium cataractarum (Craig, 1987), but contains three species-characteristic floating inversions: IL-1ex.2ex, IIL-1ex,2ex, and IIIL-1ex. No sex-linked inversions were identified; males and females had undifferentiated sex chromosomes. The IIL-1ex,2ex inversion was in Hardy-Weinberg disequilibrium in two of the three populations. From this preliminary data, two cytotypes may exist: cytotype A (Belvedre Cascade population) and cytotype B (1st Afareaitu Cascade and Jardin Public Vaipahi populations). Contrary to phylogenetic and biogeographic data, it is hypothesized that the Belvedre Cascade population (cytotype A) is ancestral to the populations containing cytotype B. Furthermore, a heterozygote advantage may exist in cytotype B.

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