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Wyszukujesz frazę "chromosome" wg kryterium: Temat


Tytuł:
Look at gene, chromosome and genome – molecular cytogenetic investigations
Autorzy:
Małuszyńska, Joanna
Tematy:
chromosome
cytogenetics
DNA
FISH
genome research
chromosome aberrations
evolution
molecular biology
Pokaż więcej
Data publikacji:
2007
Powiązania:
https://bibliotekanauki.pl/articles/703863.pdf  Link otwiera się w nowym oknie
Źródło:
Nauka; 2007, 4
1231-8515
Pojawia się w:
Nauka
Opis:
Cytogenetics is complementary to genetic and molecular analysis of genome structure and function. From the beginning it has been mainly used for identification of chromosomes and karyotype construction. Most significant for the progress in cytogenetics was development of chromosome banding techniques and in situ hybridization, especially fluorescent in situ hybridization (FISH) and its different modifications which have become the most important techniques in molecular cytogenetics. FISH allows physical gene mapping and localization of different non-coding DNA sequences on chromosomes and interphase nuclei. Repetitive DNA sequences can generate unique FISH-signal patterns on individual chromosomes valuable for karyotyping and phylogenetic analysis. These studies have important implications for basic research and practical applications. The understanding of the structure, function, organization and evolution of genomes enabled many new cytogenetic applications to both medicine and agriculture, particularly in diagnosis and plant breeding.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A low-level X chromosome mosaicism in mares, detected by chromosome painting
Autorzy:
Wieczorek, M
Switonski, M.
Yang, F.
Tematy:
horse
in situ
mosaicism
hybridization
chromosome painting
X monosomy
X chromosome paint
Pokaż więcej
Data publikacji:
2001
Powiązania:
https://bibliotekanauki.pl/articles/2041976.pdf  Link otwiera się w nowym oknie
Źródło:
Journal of Applied Genetics; 2001, 42, 2; 205-209
1234-1983
Pojawia się w:
Journal of Applied Genetics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Supernumerary marker chromosomes characterized by fluorescence in situ hybridization [FISH]
Autorzy:
Bocian, E
Stankiewicz, P
Stanczak, H
Obersztyn, E
Korniszewski, L
Mazurczak, T
Tematy:
diagnostic problem
chromosome
fluorescence in situ hybridization method
marker chromosome
phenotype-genotype correlation
Pokaż więcej
Data publikacji:
1996
Powiązania:
https://bibliotekanauki.pl/articles/2047269.pdf  Link otwiera się w nowym oknie
Źródło:
Journal of Applied Genetics; 1996, 37, 3; 313-324
1234-1983
Pojawia się w:
Journal of Applied Genetics
Opis:
Until recently marker chromosomes have presented a difficult diagnostic problem for cytogeneticists as well as for clinicians. Introduction of FISH to cytogenetic analysis has enabled identification of their origin giving possibility to outline specific phenotypic effects of defined marker chromosomes. Nine marker chromosomes were analysed with FISH using centromeric probes, chromosome- specific libraries and unique DNA sequences probes for PWS/AS critical region. The origin from acrocentric chromosomes was established in 6 cases. One marker was a product of maternal 11;22 translocation and two others were pericentromeric regions of chromosome 2 and 4. Among 6 markers, derived from acrocentric chromosomes, 2 consisted of pericentromeric part of chromosome 15, one was identified as mar (21) and in 3 other cases the origin could not be differentiated between chromosomes 13 and 21 or 14 and 22. Clinical consequences of marker chromosomes including the risk for chromosomal nondisjunction and trisomy 21 as well as the risk for uniparental disomy (UPD) are discussed.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Comparative chromosome and molecular studies of some species of genus Arum from eastern Slavonia and Baranya region in Croatia
Autorzy:
Lendel, A
Bedalov, M.
Sabo, M.
Bacic, T.
Kristin, L.
Marcek, T.
Tematy:
comparative chromosome
chromosome
Arum italicum
Arum maculatum
plant morphology
Slavonia region
Baranya region
Croatia
Pokaż więcej
Data publikacji:
2006
Powiązania:
https://bibliotekanauki.pl/articles/56460.pdf  Link otwiera się w nowym oknie
Źródło:
Acta Societatis Botanicorum Poloniae; 2006, 75, 4; 285-292
0001-6977
2083-9480
Pojawia się w:
Acta Societatis Botanicorum Poloniae
Opis:
Karyological and molecular studies were done in this paper on three species of genus Arum; Arum italicum Mill. and Arum maculatum L., with two varieties, and Arum alpinum Schott and Kotschy, also with two varieties. The main goal of this paper was to establish whether they were regularly determined exclusively on the principle of morphological parameters. Karyological studies showed that the number of chromosomes for Arum italicum Mill. amounted to 2n=84, for Arum maculatum L. 2n=56 and for Arum alpinum Schott and Kotschy 2n=28. This confirmed that these species are not only clean and separated, but also support the regularity of the morphological determination. Molecular studies, e.g. RAPD method showed that two genetically separated species groups correspond to the three mentioned species. Arum italicum Mill. is the least homogenous species closely related and the variability between populations is high. Arum maculatum L. is more homogenous within the species, two varieties could be differentiated whereas they are closely genetically related and the variability between the populations is too high. Arum alpinum is strongly homogenous and within these species two varieties could also be differentiated. That means that they are closely related and the variability between the populations is very high. These observations mostly coincided with previous morphological investigations.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The use amelogenin gene polymorphism in PCR embryo sexing in bovine IVF embryos
Autorzy:
Lechniak, D
Cumming, J R
Tematy:
polymorphism
sex chromosome
Y chromosome
bovine embryo
sex
amelogenin gene
polymerase chain reaction
embryo
Pokaż więcej
Data publikacji:
1997
Powiązania:
https://bibliotekanauki.pl/articles/2046605.pdf  Link otwiera się w nowym oknie
Źródło:
Journal of Applied Genetics; 1997, 38, 1; 45-49
1234-1983
Pojawia się w:
Journal of Applied Genetics
Opis:
The present study describes a rapid, simple method of bovine IVF embryo sexing by use of PCR technique. A pair of primers corresponding to the bovine amelogenin sequence has been used. The Rapid Cycler (Idaho Technology, USA) used in the current experiment enabled the PCR programme consisting of 55 cycles to be completed in less than 40 minutes. Therefore the total sexing procedure could be performed in less than 90 minutes. The described method succeded in case of 85% analysed embryos.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Sequential fluorescent staining with CMA and DAPI for somatic chromosome identification in cucumber [Cucumis sativus L.]
Autorzy:
Plader, W
Hoshi, Y.
Malepszy, S.
Tematy:
heterochromatin
4',6-diamidino-2-phenylindole
euchromatin segment
hybridization
chromosome identification
mitotic chromosome
prometaphase chromosome
somatic cell
cucumber
DNA
chromomycin A3
Cucumis sativus
Pokaż więcej
Data publikacji:
1998
Powiązania:
https://bibliotekanauki.pl/articles/2044260.pdf  Link otwiera się w nowym oknie
Źródło:
Journal of Applied Genetics; 1998, 39, 3; 249-258
1234-1983
Pojawia się w:
Journal of Applied Genetics
Opis:
Each of the seven chromosomes in cucumber (Cucumis sativus L.) was identified using sequential staining with Chromomycin A₃ (CMA) and 4-6-diamidino-2-phenylindole (DAPI) as DNA base-specific fluorescent dyes. The present method using enzymatic digestion produced a high level of well-spread early-metaphase chromosome complements. After CMA and DAPI staining, reproducible fluorescence bands were obtained in mitotic prometaphase chromosomes. The CMA staining method made it possible to characterize whole chromosomes from prometaphase to mid-metaphase. Chromosome 1 had the largest and widest CMA-positive (CMA⁺) band from the proximal region to the interstitial region on the long arm in prometaphase. A large gap separating of the short arm from the long arm was always observed in chromosome 2 during prometaphase. The banding pattern of the short arm was similar to that of the long arm in chromosome 2. Chromosomes 1 and 2 in early metaphase had sharp and large CMA-positive and DAPI-negative (CMA⁺DAPI⁻) bands at the pericentromeric regions. In early metaphase, chromosome 3 was characterized by having a narrow CMA⁺DAPI⁻ band on the pericentromeric region of the short arm. Chromosomes 4 and 5 showed similar chromosome length and had a large CMA⁺ band at the distal region of the long arm. Chromosome 4 did not show any clear band in the short arm, while chromosome 5 showed a telomeric CMA⁺ band at the short arm and a clear CMA⁺DAPI⁻ band at the pericentromeric region. Chromosome 6 had a CMA⁺ band at the distal region and a weak CMA⁺ band at the proximal region in each of the arms. Chromosome 7 had an evident CMA⁺ band in the long arm and a CMA⁺ DAPI⁻ band in the pericentromeric region.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analysis of chromosome aberrations, sister chromatid exchanges [SCE] and cell division kinetics in human lymphocytes exposed in vitro to new monophosphates of pyrimidine acyclonucleosides
Autorzy:
Ferenc, T
Rutkowski, M.
Bratkowska, W.
Hubner, H.
Draminski, M.
Tematy:
statistical analysis
chromatid gap
chromosome number
enzyme activity
chromosome aberration
in vitro
chromosome gap
pyrimidine
phosphorylase
acyclonucleoside monophosphate
human lymphocyte
sister chromatid exchange
cell division
Pokaż więcej
Data publikacji:
1998
Powiązania:
https://bibliotekanauki.pl/articles/2044452.pdf  Link otwiera się w nowym oknie
Źródło:
Journal of Applied Genetics; 1998, 39, 1; 113-127
1234-1983
Pojawia się w:
Journal of Applied Genetics
Opis:
Five newly synthesised monophosphates of two pyrimidine acyclonucleoside series, namely 1-N-[(2’-hydroxy)ethoxymethyl] and l-N-[(l’,3’-dihydroxy)- 2’-propoxymethyl] derivatives of 5- and 5,6-alkylated uracils were tested in vitro for chromosome aberrations and sister chromatid exchanges (SCE). Metaphase plates were obtained via microculture of human lymphocytes from heparinized peripheral blood. The compounds were tested in doses: 10, 20, 40, 80 and 150 µg per mL of culture. The tested compounds induced mainly chromatid gaps, less frequently chromosome gaps. A low number of mitoses with chromatid and chromosome breaks, acentric fragments, dicentric chromosomes and exchange figures were also observed. The tested compounds in doses: 40, 80 and 150 µg per mL, doubled or tripled the percentage of cells with chromatid gaps and chromosome gaps as compared to the control. The percentage o cells with aberrations (excluding gaps) induced by the tested compounds in all doses did not exceed 2%. The tested compounds induced a higher number of SCE per cell but less than double frequency as compared to the control. SCE frequencies and replication index (RI) values varied depending on the examined compounds. For the highest dose of the tested compounds (150 µg per mL) a significant decrease in RI values was observed for l-N-[(2’-hydroxy)ethoxymethyl]-5,6-tetramethyleneuracil monophosphate and for l-N-[(2’-hydroxy)ethoxymethyl]-5,6-dimethyluracil monophosphate. So far, the results have indicated potential clastogenicity of all the tested compounds except acycloguanosine monophosphate.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Chromosome numbers in Hieracium (Asteraceae) from Central and Southeastern Europe III
Autorzy:
Musiał, Krystyna
Janas, Agnieszka
Szeląg, Zbigniew
Tematy:
asteraceae
chromosome number
europe
hieracium
karyotype
Pokaż więcej
Data publikacji:
2017
Powiązania:
https://bibliotekanauki.pl/articles/952061.pdf  Link otwiera się w nowym oknie
Źródło:
Acta Biologica Cracoviensia. Series Botanica; 2017, 59, 2
0001-5296
Pojawia się w:
Acta Biologica Cracoviensia. Series Botanica
Opis:
Chromosome numbers for 13 species of Hieracium L. s.str. from Bulgaria, Macedonia, Poland and Romania are given and their metaphase plates are illustrated. Chromosome numbers are published for the first time for H. djimilense s.lat. 2n=3x=27, H. fiekii R. Uechtr. 2n=3x=27, H. glabrescens (F. W. Schultz) Murr 2n=3x=27, H. juranomorphum Zahn 2n=3x=27, H. sparsiflorum subsp. sparsiceps Zahn 2n=3x=27 and H. sparsum subsp. naegelianiforme Behr & Zahn 2n=3x=27.
Dostawca treści:
Biblioteka Nauki
Artykuł

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