Chromosome polymorphism in Astyanax fasciatus (Teleostei, Characidae). 1. Karyotype analysis, Ag-NORs and mapping of the 18S and 5S ribosomal genes in sympatric karyotypes and their possible hybrid forms

2006 ◽  
Vol 112 (3-4) ◽  
pp. 313-319 ◽  
Author(s):  
R. Pazza ◽  
K.F. Kavalco ◽  
L.A.C. Bertollo
Keyword(s):  
Karyotype Analysis ◽  
Ribosomal Genes ◽  
Chromosome Polymorphism ◽  
Astyanax Fasciatus ◽  
Hybrid Forms

scholarly journals Karyotype Analysis and Mapping of the 18S and 5S Ribosomal Genes in Astyanax fasciatus (Teleostei, Characiformes) from Paranapanema River Basin

CYTOLOGIA ◽  
2009 ◽  
Vol 74 (3) ◽  
pp. 295-300 ◽  
Author(s):  
Carlos Alexandre Fernandes ◽  
Isabel Cristina Martins-Santos ◽  
Dayani Bailly
Keyword(s):  
River Basin ◽  
Karyotype Analysis ◽  
Ribosomal Genes ◽  
Astyanax Fasciatus

Karyotype, C-banding, and Ag-NOR analysis in Diplodus bellottii (Sparidae, Perciforms). Intra-individual polymorphism involving heterochromatic regions

Genome ◽  
1993 ◽  
Vol 36 (4) ◽  
pp. 672-675 ◽  
Author(s):  
A. Amores ◽  
G. Martinez ◽  
J. Reina ◽  
M. C. Alvarez
Keyword(s):  
Karyotype Evolution ◽  
Karyotype Analysis ◽  
Centric Fusion ◽  
Active Regions ◽  
Chromosome Polymorphism ◽  
Terminal Position ◽  
C Banding ◽  
Metacentric Pair ◽  
Pericentric Inversions ◽  
Nucleolus Organizers

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 detected in one specimen, resulting in two karyotypic forms in roughly identical proportion, owing to a larger C-band by the NOR regions, appearing either in a terminal position of the short arms of pair 2 or in telomeric position of pair 3. These findings suggest that the extra heterochromatic segment responsible for the heteromorphism apparently only involves associated heterochromatin and not the NORs themselves. This C-positive block seems to have eventually been transferred between heterologous NOR chromosomes by a somatic event, facilitated by the physical proximity of NOR pairs in the nucleolus.Key words: Sparidae, karyotype, heterochromatin, nucleolus organizers, chromosome polymorphism.

Chromosome polymorphism in Astyanax fasciatus (Teleostei, Characidae), Part 3: Analysis of the RAPD and ISSR molecular markers

2007 ◽  
Vol 35 (12) ◽  
pp. 843-851 ◽  
Author(s):  
Rubens Pazza ◽  
Karine Frehner Kavalco ◽  
Sônia Maria Alves Pinto Prioli ◽  
Alberto José Prioli ◽  
Luiz Antonio Carlos Bertollo
Keyword(s):  
Molecular Markers ◽  
Chromosome Polymorphism ◽  
Astyanax Fasciatus ◽  
Issr Molecular Markers ◽  
Rapd And Issr

scholarly journals A Large-scale Karyotype Analysis of Genetic Counselors and Fetuses Among Hakka Population in Southern China

2021 ◽  
Author(s):  
Hua Zhong ◽  
Qingyan Huang ◽  
Zhikang Yu ◽  
Heming Wu
Keyword(s):  
Retrospective Analysis ◽  
Peripheral Blood ◽  
Detection Rate ◽  
Sex Chromosome ◽  
Chromosomal Abnormalities ◽  
Karyotype Analysis ◽  
Chromosome Polymorphism ◽  
Blood Samples ◽  
Structural Abnormalities ◽  
Sex Chromosome Aneuploidies

Abstract Background: Karyotype analysis has been used in a clinical cytogenetic laboratory. A retrospective analysis of karyotype analysis in Meizhou area to provide valuable reference for clinical genetic counseling. A retrospective analysis of 5-year data of karyotype analysis from 5,289 peripheral blood samples and 2,882 fetuses between January 2015 and March 2020 in Meizhou area.Results: Chromosomal abnormalities were detected in a total of 392 peripheral blood samples, and the abnormality detection rate (ADR) was 7.41% (392/5,289). The ADR for sex chromosome aneuploidies, autosomal aneuploidies, structural abnormalities and chromosome polymorphisms were 1.29% (68/5,289), 0.72% (38/5,289), 1.55% (82/5,289) and 3.86% (204/5,289). Among cases with chromosomal abnormalities, numerical abnormalities, chromosomal structural abnormalities and chromosome polymorphism accounted for 27.04% (106/392), 20.92% (82/392) and 52.04% (204/392), respectively. There were statistically significant differences in the chromosomal abnormalities rate different types of patients. In addition, chromosomal abnormalities were detected in a total of 307 fetus samples, and the ADR was 10.65% (307/2,882). The ADR for sex chromosome aneuploidies, autosomal aneuploidies, triploid/tetraploid, structural abnormalities and chromosome polymorphisms were 1.70% (49/2,882), 5.45% (157/2,882), 0.14% (4/2,882), 1.39% (40/2,882) and 1.94% (56/2,882). Among fetuses with chromosomal abnormalities, numerical abnormalities, chromosomal structural abnormalities and chromosome polymorphism accounted for 68.40% (210/307), 13.03% (40/307) and 18.24% (56/307), respectively. The chromosomal abnormalities rate was higher than that in non-elderly pregnant women. Abnormal chromosome karyotype detection rate is higher in genetic counselors in Meizhou area.Conclusions: Karyotype analysis has great significance for clinical diagnosis, guide the healthy birth, and improve the quality of the population.

Detection Y Chromosome Microdeletions Among Iraq Population in Infertile Patients with Azoospermia and Severe Oligospermia

2019 ◽  
Vol 9 (02) ◽  
Author(s):  
Samah A Hammood ◽  
Alaauldeen S M AL-Sallami ◽  
Saleh M Al-Khafaji
Keyword(s):  
Y Chromosome ◽  
Karyotype Analysis ◽  
Semen Analysis ◽  
Obstructive Azoospermia ◽  
Severe Oligozoospermia ◽  
Infertile Men ◽  
Y Chromosome Microdeletions ◽  
Detailed Evaluation ◽  
Health Organization ◽  
Infertile Patients

Objective: To detection of microdeletions of Y chromosome and study the frequency of microdeletions in infertile men with non-obstructive azoospermia or severe oligozoospermia(Middle Euphrates center)in Iraq population. Material and methods: 153 males were included in the study, the casesweredivided into groups according to the infertility etiology and semen analysis according to Word health organization, the frequencies and the characteristicsof Y chromosome microdeletions were investigated in groups. Multiplex PCR was applied to detect the microdeletions. Results:Y chromosome microdeletion was detected in 42 (40.7%) of 153 cases ,Microdeletions in azoospermia showed more frequently detected 28 (52.8%), followed by severe oligospermia 14 (28 %),Microdeletions in the AZFc region were the most common 12 (22.64%), followed by AZFb 11(20.75%) and AZFa 5(9.43%) in azoospermia compared to severe oligospermisAZFc 6 (12%) AZFb 4 (8 %) and AZFa 4 (8%). Conclusion: Y chromosome microdeletions were detected quite frequently in certain infertility subgroups. Therefore, detailed evaluation of an infertile man by physical examination, semen analysis, hormonal evaluationsand when required, karyotype analysis may predict the patients for whom Y chromosome microdeletionanalysis is necessary and also prevent cost increases. Recommendation: This study emphasizes that analysis of microdeletions should be carried out for all patients with idiopathic azoospermia and severe oligospermia who are candidates for intracytoplasmic sperm injection

Differential Expression of Ribosomal Genes in Brain and Blood of Alzheimer’s Disease Patients

2015 ◽  
Vol 12 (10) ◽  
pp. 984-989 ◽  
Author(s):  
Lucas Rasmussen ◽  
Roger de Labio ◽  
Gustavo Viani ◽  
Elizabeth Chen ◽  
Joao Villares ◽  
...  
Keyword(s):  
Alzheimer’S Disease ◽  
Alzheimer's Disease ◽  
Differential Expression ◽  
Ribosomal Genes
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