Evidence map›Paper›PMID 31771477›Full record

ArticleProceedings. Biological sciences2019

Repeated sex chromosome evolution in vertebrates supported by expanded avian sex chromosomes.

Hanna Sigeman, Suvi Ponnikas, Pallavi Chauhan, Elisa Dierickx, M de L Brooke, Bengt Hansson

Abstract read
In one paragraph

Article in Proceedings. Biological sciences, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 35 papers.

0numbers the graph read from it
0cells of the map it votes in
35citing papers in PubMed
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

35 citing papers in PubMed.

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4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

6 authors.

Hanna SigemanDepartment of Biology, Lund University, Ecology Building, 223 62 Lund, Sweden.
Suvi PonnikasDepartment of Biology, Lund University, Ecology Building, 223 62 Lund, Sweden.
Pallavi ChauhanDepartment of Biology, Lund University, Ecology Building, 223 62 Lund, Sweden.
Elisa DierickxDepartment of Zoology, University of Cambridge, Downing Street, Cambridge CB23EJ, UK.
M de L BrookeDepartment of Zoology, University of Cambridge, Downing Street, Cambridge CB23EJ, UK.
Bengt HanssonDepartment of Biology, Lund University, Ecology Building, 223 62 Lund, Sweden.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Sex chromosomes have evolved from the same autosomes multiple times across vertebrates, suggesting that selection for recombination suppression has acted repeatedly and independently on certain genetic backgrounds. Here, we perform comparative genomics of a bird clade (larks and their sister lineage; Alaudidae and Panuridae) where multiple autosome-sex chromosome fusions appear to have formed expanded sex chromosomes. We detected the largest known avian sex chromosome (195.3 Mbp) and show that it originates from fusions between parts of four avian chromosomes: Z, 3, 4A and 5. Within these four chromosomes, we found evidence of five evolutionary strata where recombination had been suppressed at different time points, and show that stratum age explained the divergence rate of Z-W gametologs. Next, we analysed chromosome content and found that chromosome 3 was significantly enriched for genes with predicted sex-related functions. Finally, we demonstrate extensive homology to sex chromosomes in other vertebrate lineages: chromosomes Z, 3, 4A and 5 have independently evolved into sex chromosomes in fish (Z), turtles (Z, 5), lizards (Z, 4A), mammals (Z, 4A) and frogs (Z, 3, 4A, 5). Our results provide insights into and support for repeated evolution of sex chromosomes in vertebrates.

Indexed as

Biological EvolutionSex ChromosomesAnimalsFemaleMaleMammalsPasseriformesPhylogenyVertebratesbirddegenerationneo-sex chromosomerecombinationsex chromosomevertebrate

Identifiers

PMID31771477
PMCPMC6939255

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.