| Title |
Chromosomal organization of repetitive DNA sequences in Astyanax bockmanni (Teleostei, Characiformes): dispersive location, association and co-localization in the genome
|
|---|---|
| Published in |
Genetica, September 2013
|
| DOI | 10.1007/s10709-013-9732-7 |
| Pubmed ID | |
| Authors |
Duílio M. Z. A. Silva, José Carlos Pansonato-Alves, Ricardo Utsunomia, Sandro Natal Daniel, Diogo Teruo Hashimoto, Claudio Oliveira, Fabio Porto-Foresti, Fausto Foresti |
| Abstract |
Repetitive DNA sequences constitute a great portion of the genome of eukaryotes and are considered key components to comprehend evolutionary mechanisms and karyotypic differentiation. Aiming to contribute to the knowledge of chromosome structure and organization of some repetitive DNA classes in the fish genome, chromosomes of two allopatric populations of Astyanax bockmanni were analyzed using classic cytogenetics techniques and fluorescent in situ hybridization, with probes for ribosomal DNA sequences, histone DNA and transposable elements. These Astyanax populations showed the same diploid number (2n = 50), however with differences in chromosome morphology, distribution of constitutive heterochromatin, and location of 18S rDNA and retroelement Rex3 sites. In contrast, sites for 5S rDNA and H1, H3 and H4 histones showed to be co-located and highly conserved. Our results indicate that dispersion and variability of 18S rDNA and heterochromatin sites are not associated with macro rearrangements in the chromosome structure of these populations. Similarly, distinct evolutionary mechanisms would act upon histone genes and 5S rDNA, contributing to chromosomal association and co-location of these sequences. Data obtained indicate that distinct mechanisms drive the spreading of repetitive DNAs in the genome of A. bockmanni. Also, mobile elements may account for the polymorphism of the major rDNA sites and heterochromatin in this genus. |
Mendeley readers
The data shown below were compiled from readership statistics for 49 Mendeley readers of this research output. Click here to see the associated Mendeley record.
Geographical breakdown
| Country | Count | As % |
|---|---|---|
| Czechia | 1 | 2% |
| Brazil | 1 | 2% |
| Unknown | 47 | 96% |
Demographic breakdown
| Readers by professional status | Count | As % |
|---|---|---|
| Student > Master | 10 | 20% |
| Student > Postgraduate | 8 | 16% |
| Student > Ph. D. Student | 8 | 16% |
| Student > Doctoral Student | 6 | 12% |
| Student > Bachelor | 6 | 12% |
| Other | 7 | 14% |
| Unknown | 4 | 8% |
| Readers by discipline | Count | As % |
|---|---|---|
| Agricultural and Biological Sciences | 29 | 59% |
| Biochemistry, Genetics and Molecular Biology | 11 | 22% |
| Environmental Science | 2 | 4% |
| Unspecified | 1 | 2% |
| Earth and Planetary Sciences | 1 | 2% |
| Other | 2 | 4% |
| Unknown | 3 | 6% |
Attention Score in Context
This research output has an Altmetric Attention Score of 6. This is our high-level measure of the quality and quantity of online attention that it has received. This Attention Score, as well as the ranking and number of research outputs shown below, was calculated when the research output was last mentioned on 05 September 2013.
All research outputs
#5,850,196
of 22,719,618 outputs
Outputs from Genetica
#101
of 713 outputs
Outputs of similar age
#49,442
of 197,012 outputs
Outputs of similar age from Genetica
#3
of 8 outputs
Altmetric has tracked 22,719,618 research outputs across all sources so far. This one has received more attention than most of these and is in the 74th percentile.
So far Altmetric has tracked 713 research outputs from this source. They receive a mean Attention Score of 3.7. This one has done well, scoring higher than 85% of its peers.
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We're also able to compare this research output to 8 others from the same source and published within six weeks on either side of this one. This one has scored higher than 5 of them.