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Tytuł pozycji:

Heteromorphic Sex Chromosomes and Their DNA Content in Fish: An Insight through Satellite DNA Accumulation in Megaleporinus elongatus.

Tytuł:
Heteromorphic Sex Chromosomes and Their DNA Content in Fish: An Insight through Satellite DNA Accumulation in Megaleporinus elongatus.
Autorzy:
Crepaldi C
Parise-Maltempi PP
Źródło:
Cytogenetic and genome research [Cytogenet Genome Res] 2020; Vol. 160 (1), pp. 38-46. Date of Electronic Publication: 2020 Feb 25.
Typ publikacji:
Journal Article
Język:
English
Imprint Name(s):
Original Publication: Basel ; New York : S. Karger, c2002-
MeSH Terms:
Characiformes/*genetics
DNA/*genetics
DNA, Satellite/*genetics
Sex Chromosomes/*genetics
Animals ; Cell Lineage ; Chromosome Mapping ; Evolution, Molecular ; Female ; Genome ; Genomics ; Heterochromatin/metabolism ; In Situ Hybridization, Fluorescence ; Male ; Metaphase ; Sequence Analysis, DNA
Contributed Indexing:
Keywords: FISH; Heteromorphic sex chromosome system; Neotropical fish; Satellitome; Sex chromosome evolution
Substance Nomenclature:
0 (DNA, Satellite)
0 (Heterochromatin)
9007-49-2 (DNA)
Entry Date(s):
Date Created: 20200225 Date Completed: 20200417 Latest Revision: 20200417
Update Code:
20240105
DOI:
10.1159/000506265
PMID:
32092756
Czasopismo naukowe
The repetitive DNA content of fish sex chromosomes provides valuable insights into specificities and patterns of their genetic sex determination systems. In this study, we revealed the genomic satellite DNA (satDNA) content of Megaleporinuselongatus, a Neotropical fish species with Z1Z1Z2Z2/Z1W1Z2W2 multiple sex chromosomes, through high-throughput analysis and graph-based clustering, isolating 68 satDNA families. By physically mapping these sequences in female metaphases, we discovered 15 of the most abundant satDNAs clustered in its chromosomes, 9 of which were found exclusively in the highly heterochromatic W1. This heteromorphic sex chromosome showed the highest amount of satDNA accumulations in this species. The second most abundant family, MelSat02-26, shared FISH signals with the NOR-bearing pair in similar patterns and is linked to the multiple sex chromosome system. Our results demonstrate the diverse satDNA content in M. elongatus, especially in its heteromorphic sex chromosome. Additionally, we highlighted the different accumulation patterns and distribution of these sequences across species by physically mapping these satDNAs in other Anostomidae, Megaleporinusmacrocephalus and Leporinusfriderici (a species without differentiated sex chromosomes).
(© 2020 S. Karger AG, Basel.)

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