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Relevant bibliographies by topics / Heterochromatin polymorphism

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Academic literature on the topic 'Heterochromatin polymorphism'

Author: Grafiati

Published: 18 May 2024

Last updated: 31 July 2025

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Journal articles on the topic "Heterochromatin polymorphism"

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Sharma, Atashi, Nicholas A. Kinney, Vladimir A. Timoshevskiy, Maria V. Sharakhova, and Igor V. Sharakhov. "Structural Variation of the X Chromosome Heterochromatin in the Anopheles gambiae Complex." Genes 11, no. 3 (2020): 327. http://dx.doi.org/10.3390/genes11030327.

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Heterochromatin is identified as a potential factor driving diversification of species. To understand the magnitude of heterochromatin variation within the Anopheles gambiae complex of malaria mosquitoes, we analyzed metaphase chromosomes in An. arabiensis, An. coluzzii, An. gambiae, An. merus, and An. quadriannulatus. Using fluorescence in situ hybridization (FISH) with ribosomal DNA (rDNA), a highly repetitive fraction of DNA, and heterochromatic Bacterial Artificial Chromosome (BAC) clones, we established the correspondence of pericentric heterochromatin between the metaphase and polytene X

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Hatsumi, Machiko. "Karyotype polymorphism in Drosophila albomicans." Genome 29, no. 3 (1987): 395–400. http://dx.doi.org/10.1139/g87-069.

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Supernumerary (B) chromosomes are present in Thai, Malay, and Burmese populations of Drosophila albomicans (2n = 6) in a polymorphic state. Although usually stable at mitosis, their numbers differed between individuals and their frequency was also different between isofemale lines and between populations. Arm 3 of the X3 chromosome was polymorphic for the presence and the size of a procentric heterochromatic segment. Chromosome 4 is polytypic for variation in length governed by differences in the amount of heterochromatin and the long variant is polymorphic for the location of its secondary co

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3

Amores, A., G. Martinez, J. Reina, and M. C. Alvarez. "Karyotype, C-banding, and Ag-NOR analysis in Diplodus bellottii (Sparidae, Perciforms). Intra-individual polymorphism involving heterochromatic regions." Genome 36, no. 4 (1993): 672–75. http://dx.doi.org/10.1139/g93-090.

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A karyotype analysis was carried out in nine specimens of the Sparid species Diplodus bellottii using conventional staining, as well as C-banding and Ag-NOR banding techniques, showing, respectively, 2n = 46 and fundamental number (FN) = 54, and scarce heterochromatic areas irregularly distributed and up to four NOR active regions that were C positive. When compared with the karyotypes of other related species, one centric fusion giving rise to a large metacentric pair and several pericentric inversions seem to have been involved in the karyotype evolution. An intra-individual polymorphism was

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Asamizu, Erika, Kenta Shirasawa, Hideki Hirakawa, et al. "Mapping of Micro-Tom BAC-End Sequences to the Reference Tomato Genome Reveals Possible Genome Rearrangements and Polymorphisms." International Journal of Plant Genomics 2012 (November 27, 2012): 1–8. http://dx.doi.org/10.1155/2012/437026.

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A total of 93,682 BAC-end sequences (BESs) were generated from a dwarf model tomato, cv. Micro-Tom. After removing repetitive sequences, the BESs were similarity searched against the reference tomato genome of a standard cultivar, “Heinz 1706.” By referring to the “Heinz 1706” physical map and by eliminating redundant or nonsignificant hits, 28,804 “unique pair ends” and 8,263 “unique ends” were selected to construct hypothetical BAC contigs. The total physical length of the BAC contigs was 495, 833, 423 bp, covering 65.3% of the entire genome. The average coverage of euchromatin and heterochr

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Mayr, B., G. Geber, H. Auer, M. Kalat, and W. Schleger. "Heterochromatin composition and nucleolus organizer activity in four canid species." Canadian Journal of Genetics and Cytology 28, no. 5 (1986): 744–53. http://dx.doi.org/10.1139/g86-105.

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Sequential staining with a counterstain-contrasted fluorescent banding technique (chromomycin A3 – distamycin A – DAPI) revealed the occurrence of distamycin A – 4,6-diamidino-2-phenylindole (DA–DAPI) staining heterochromatin in the centromeric regions of chromosomes 33, 36, 37, and 38 in the wolf (Canis lupus pallipes) and of chromosomes 13, 16, and 23 in the blue fox (Alopex lagopus). The red fox (Vulpes vulpes) lacked such regions. Staining with DAPI – actinomycin D produced a QFH-type banding pattern with clearcut differences in the staining behaviour of DA–DAPI positive regions between th

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Valente, Guilherme, Carla Vitorino, Diogo Cabral-de-Mello, et al. "Comparative cytogenetics of ten species of cichlid fishes (Teleostei, Cichlidae) from the Araguaia River system, Brazil, by conventional cytogenetic methods." Comparative Cytogenetics 6, no. (2) (2012): 163–81. https://doi.org/10.3897/compcytogen.v6i2.1739.

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Cichlids represent one of the most species-rich families of fishes and have attracted the attention of evolutionary biologists due to the rapid radiation occurring in some groups and the importance of some species in the world aquaculture. Cytogenetic analysis was conducted in 10 cichlid species from the Araguaia River, Amazon Basin, Brazil. The chromosome number was 2n=48 for all analyzed species except for <i>Laetacara araguaiae</i> Ottoni et Costa, 2009 (2n=44). Chromosomal polymorphism was detected only in <i>Geophagus proximus </i>(Castelnau, 1855), which exhibits an extra large submetace

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Cabrero, Josefa, and Juan Pedro M. Camacho. "Population cytogenetics of Chorthippus vagans. I. Polymorphisms for pericentric inversion and for heterochromatin deletion." Genome 29, no. 2 (1987): 280–84. http://dx.doi.org/10.1139/g87-048.

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Two different polymorphisms have been identified in natural populations of the grasshopper Chorthippus vagans. One of these involved an inversion polymorphism in the M7 chromosome and was present in two populations from Granada. In one of these, from Prados del Pinar, the frequency of this polymorphism was constant over three consecutive generations, and meiotic studies of heterozygous individuals indicated that this inversion had not effect on male fertility. The second polymorphism involved a deletion of the distal C-band of the short arm of the M4 chromosome, which was observed in three dif

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Taran Kyzy, Jafar Aliyev. "Value heterochromatin and polymorphic varian gene folat cycle in women with miscarried and losses of pregnancy." HEALTH OF WOMAN, no. 9(115) (November 30, 2016): 148–51. http://dx.doi.org/10.15574/hw.2016.115.148.

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The article presents data from surveys of women of losses of pregnancy (LP) in history, conducted within the medical genetic counseling, given the urgency of specifying genetic factors that actually are in causal connection with the LP specification clinical effects of epigenetic variability. The objective: to clarify the meaning of the changes in women heterochromatin (chromosomal polymorphism) and polymorphic variants of genes folat cycle enzymes as potential risk factors and pathogenic primordial LP. Patients and methods. The study involved two groups of women: I - 154 observations with com

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Di Meo, G. P., A. Perucatti, L. Iannuzzi, M. T. Rangel-Figueiredo, and L. Ferrara. "Constitutive heterochromatin polymorphism in river buffalo chromosomes." Caryologia 48, no. 2 (1995): 137–46. http://dx.doi.org/10.1080/00087114.1995.10797323.

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Chassovnikarova, T., Nasko Atanasov, and H. Dimitrov. "Chromosome polymorphism in Bulgarian populations of the striped field mouse (Apodemus agrarius Pallas 1771)." Comparative Cytogenetics 3, no. (1) (2009): 1–9. https://doi.org/10.3897/compcytogen.v3i1.2.

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Chromosome polymorphism in Bulgarian populations of the striped field mouse (<em>Apodemus agrarius</em> Pallas, 1771) has been described. The diploid chromosome number is 2n=48 (NFa = 54). In the karyotype of 3 specimens from the Iskar region, the presence of an additional B chromosome has been established for the first time. The autosomes are 19 acrocentric pairs, continuously decreasing in size, and 4 pairs of bi-armed chromosomes, barely distinguishable by size and location of the centromere. Specimens with 3 pairs of metacentric chromosomes were firstly described in Bulgaria for the region

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Dissertations / Theses on the topic "Heterochromatin polymorphism"

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Davison, Jerry. "Polymorphism and replication of heterochromatic repeats in the DNA of Arabidopsis /." Thesis, Connect to this title online; UW restricted, 2006. http://hdl.handle.net/1773/5134.

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Doco-Fenzy, Martine. "De l'adn satellite aux satellites chromosomiques : etude du polymorphisme de la structure des bras courts des chromosomes acrocentriques humains par hybridation in situ revelee en fluorescence (doctorat : genie biologique)." Reims, 1998. http://www.theses.fr/1998REIMM205.

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Books on the topic "Heterochromatin polymorphism"

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Kalz, Lieselotte. Qualitative und quantitative Charakterisierung von Polymorphismen des knostitutiven heterochromatins verschiedener ethnischer Populationen durch cytogenetische und molekularcytogenetische Techniken. 2001.

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