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Whole-genome analysis across 10 songbird families within Sylvioidea reveals a novel autosome-sex chromosome fusion

Sigeman, Hanna LU ; Ponnikas, Suvi LU and Hansson, Bengt LU (2020) In Biology letters 16(4).
Abstract

Sex chromosomes in birds have long been considered to be extremely stable. However, this notion has lately been challenged by findings of independent autosome-sex chromosome fusions within songbirds, several of which occur within a single clade, the superfamily Sylvioidea. To understand what ecological and evolutionary processes drive changes in sex chromosome systems, we need complete descriptions of sex chromosome diversity across taxonomic groups. Here, we characterize the sex chromosome systems across Sylvioidea using whole-genome data of species representatives of 10 different families, including two published and eight new genomes. We describe a novel fusion in the family Cisticolidae (represented by Cisticola juncidis) involving... (More)

Sex chromosomes in birds have long been considered to be extremely stable. However, this notion has lately been challenged by findings of independent autosome-sex chromosome fusions within songbirds, several of which occur within a single clade, the superfamily Sylvioidea. To understand what ecological and evolutionary processes drive changes in sex chromosome systems, we need complete descriptions of sex chromosome diversity across taxonomic groups. Here, we characterize the sex chromosome systems across Sylvioidea using whole-genome data of species representatives of 10 different families, including two published and eight new genomes. We describe a novel fusion in the family Cisticolidae (represented by Cisticola juncidis) involving a part of chromosome 4. We also confirm the previously identified fusion between chromosome Z and a part of chromosome 4A in all 10 families and show that fusions involving parts of chromosomes 3 and 5 are not found outside the families where they were first discovered (Alaudidae and Panuridae). These findings add to the complexity of the sex chromosome system in Sylvioidea, where four independent autosome-sex chromosome fusions have now been identified.

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author
; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
autosome–sex chromosome fusion, birds, genomics, sex chromosome, Sylvioidea
in
Biology letters
volume
16
issue
4
publisher
Royal Society
external identifiers
  • pmid:32315592
  • scopus:85083872270
ISSN
1744-9561
DOI
10.1098/rsbl.2020.0082
language
English
LU publication?
yes
id
5579b3e6-03f7-41fb-976b-28e872a26b5c
date added to LUP
2020-05-20 14:00:39
date last changed
2020-05-21 03:00:04
@article{5579b3e6-03f7-41fb-976b-28e872a26b5c,
  abstract     = {<p>Sex chromosomes in birds have long been considered to be extremely stable. However, this notion has lately been challenged by findings of independent autosome-sex chromosome fusions within songbirds, several of which occur within a single clade, the superfamily Sylvioidea. To understand what ecological and evolutionary processes drive changes in sex chromosome systems, we need complete descriptions of sex chromosome diversity across taxonomic groups. Here, we characterize the sex chromosome systems across Sylvioidea using whole-genome data of species representatives of 10 different families, including two published and eight new genomes. We describe a novel fusion in the family Cisticolidae (represented by Cisticola juncidis) involving a part of chromosome 4. We also confirm the previously identified fusion between chromosome Z and a part of chromosome 4A in all 10 families and show that fusions involving parts of chromosomes 3 and 5 are not found outside the families where they were first discovered (Alaudidae and Panuridae). These findings add to the complexity of the sex chromosome system in Sylvioidea, where four independent autosome-sex chromosome fusions have now been identified.</p>},
  author       = {Sigeman, Hanna and Ponnikas, Suvi and Hansson, Bengt},
  issn         = {1744-9561},
  language     = {eng},
  number       = {4},
  publisher    = {Royal Society},
  series       = {Biology letters},
  title        = {Whole-genome analysis across 10 songbird families within Sylvioidea reveals a novel autosome-sex chromosome fusion},
  url          = {http://dx.doi.org/10.1098/rsbl.2020.0082},
  doi          = {10.1098/rsbl.2020.0082},
  volume       = {16},
  year         = {2020},
}