Sökning: id:"swepub:oai:DiVA.org:uu-469130" >
Out of patterns, th...
Out of patterns, the euchromatic B chromosome of the grasshopper Abracris flavolineata is not enriched in high-copy repeats
-
- Milani, Diogo (författare)
- Univ Estadual Paulista, Inst Biociencias IB, Dept Biol Geral & Aplicada, UNESP, Rio Claro, SP, Brazil.
-
- Ruiz-Ruano, Francisco J. (författare)
- Uppsala universitet,Systematisk biologi,Univ East Anglia, Sch Biol Sci, Norwich Res Pk, Norwich, Norfolk, England.
-
- Camacho, Juan Pedro M. (författare)
- UGR Univ Granada, Fac Ciencias, Dept Genet, Granada, Spain.
-
visa fler...
-
- Cabral-de-Mello, Diogo C. (författare)
- Univ Estadual Paulista, Inst Biociencias IB, Dept Biol Geral & Aplicada, UNESP, Rio Claro, SP, Brazil.
-
visa färre...
-
Univ Estadual Paulista, Inst Biociencias IB, Dept Biol Geral & Aplicada, UNESP, Rio Claro, SP, Brazil Systematisk biologi (creator_code:org_t)
- 2021-09-04
- 2021
- Engelska.
-
Ingår i: Heredity. - : Springer Nature. - 0018-067X .- 1365-2540. ; 127:5, s. 475-483
- Relaterad länk:
-
https://ueaeprints.u...
-
visa fler...
-
https://urn.kb.se/re...
-
https://doi.org/10.1...
-
visa färre...
Abstract
Ämnesord
Stäng
- In addition to the normal set of standard (A) chromosomes, some eukaryote species harbor supernumerary (B) chromosomes. In most cases, B chromosomes show differential condensation with respect to A chromosomes and display dark C-bands of heterochromatin, and some of them are highly enriched in repetitive DNA. Here we perform a comprehensive NGS (next-generation sequencing) analysis of the repeatome in the grasshopper Abracris flavolineata aimed at uncovering the molecular composition and origin of its B chromosome. Our results have revealed that this B chromosome shows a DNA repeat content highly similar to the DNA repeat content observed for euchromatic (non-C-banded) regions of A chromosomes. Moreover, this B chromosome shows little enrichment for high-copy repeats, with only a few elements showing overabundance in B-carrying individuals compared to the 0B individuals. Consequently, the few satellite DNAs (satDNAs) mapping on the B chromosome were mostly restricted to its centromeric and telomeric regions, and they displayed much smaller bands than those observed on the A chromosomes. Our data support the intraspecific origin of the B chromosome from the longest autosome by misdivision, isochromosome formation, and additional restructuring, with accumulation of specific repeats in one or both B chromosome arms, yielding a submetacentric B. Finally, the absence of B-specific satDNAs, which are frequent in other species, along with its euchromatic nature, suggest that this B chromosome arose recently and might still be starting a heterochromatinization process. On this basis, it could be a good model to investigate the initial steps of B chromosome evolution.
Ämnesord
- NATURVETENSKAP -- Biologi -- Genetik (hsv//swe)
- NATURAL SCIENCES -- Biological Sciences -- Genetics (hsv//eng)
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
Hitta via bibliotek
-
Heredity
(Sök värdpublikationen i LIBRIS)
Till lärosätets databas