| Title |
More sex chromosomes than autosomes in the Amazonian frog Leptodactylus pentadactylus
|
|---|---|
| Published in |
Chromosoma, January 2018
|
| DOI | 10.1007/s00412-018-0663-z |
| Pubmed ID | |
| Authors |
T. Gazoni, C. F. B. Haddad, H. Narimatsu, D. C. Cabral-de-Mello, M. L. Lyra, P. P. Parise-Maltempi |
| Abstract |
Heteromorphic sex chromosomes are common in eukaryotes and largely ubiquitous in birds and mammals. The largest number of multiple sex chromosomes in vertebrates known today is found in the monotreme platypus (Ornithorhynchus anatinus, 2n = 52) which exhibits precisely 10 sex chromosomes. Interestingly, fish, amphibians, and reptiles have sex determination mechanisms that do or do not involve morphologically differentiated sex chromosomes. Relatively few amphibian species carry heteromorphic sex chromosomes, and when present, they are frequently represented by only one pair, either XX:XY or ZZ:ZW types. Here, in contrast, with several evidences, from classical and molecular cytogenetic analyses, we found 12 sex chromosomes in a Brazilian population of the smoky jungle frog, designated as Leptodactylus pentadactylus Laurenti, 1768 (Leptodactylinae), which has a karyotype with 2n = 22 chromosomes. Males exhibited an astonishing stable ring-shaped meiotic chain composed of six X and six Y chromosomes. The number of sex chromosomes is larger than the number of autosomes found, and these data represent the largest number of multiple sex chromosomes ever found among vertebrate species. Additionally, sequence and karyotype variation data suggest that this species may represent a complex of species, in which the chromosomal rearrangements may possibly have played an important role in the evolution process. |
X Demographics
The data shown below were collected from the profiles of 261 X users who shared this research output. Click here to find out more about how the information was compiled.
Geographical breakdown
| Country | Count | As % |
|---|---|---|
| United States | 85 | 33% |
| United Kingdom | 29 | 11% |
| Canada | 14 | 5% |
| Germany | 8 | 3% |
| Australia | 5 | 2% |
| France | 4 | 2% |
| New Zealand | 4 | 2% |
| India | 3 | 1% |
| Brazil | 3 | 1% |
| Other | 25 | 10% |
| Unknown | 81 | 31% |
Demographic breakdown
| Type | Count | As % |
|---|---|---|
| Members of the public | 125 | 48% |
| Scientists | 125 | 48% |
| Science communicators (journalists, bloggers, editors) | 8 | 3% |
| Practitioners (doctors, other healthcare professionals) | 3 | 1% |
Mendeley readers
The data shown below were compiled from readership statistics for 76 Mendeley readers of this research output. Click here to see the associated Mendeley record.
Geographical breakdown
| Country | Count | As % |
|---|---|---|
| Unknown | 76 | 100% |
Demographic breakdown
| Readers by professional status | Count | As % |
|---|---|---|
| Student > Ph. D. Student | 17 | 22% |
| Student > Bachelor | 9 | 12% |
| Student > Doctoral Student | 7 | 9% |
| Researcher | 7 | 9% |
| Student > Master | 5 | 7% |
| Other | 9 | 12% |
| Unknown | 22 | 29% |
| Readers by discipline | Count | As % |
|---|---|---|
| Biochemistry, Genetics and Molecular Biology | 24 | 32% |
| Agricultural and Biological Sciences | 22 | 29% |
| Immunology and Microbiology | 2 | 3% |
| Business, Management and Accounting | 1 | 1% |
| Nursing and Health Professions | 1 | 1% |
| Other | 1 | 1% |
| Unknown | 25 | 33% |
Attention Score in Context
This research output has an Altmetric Attention Score of 174. 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 01 November 2020.
All research outputs
#236,012
of 25,718,113 outputs
Outputs from Chromosoma
#1
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Outputs of similar age
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Outputs of similar age from Chromosoma
#1
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