2021
DOI: 10.1371/journal.pgen.1009704
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How did the guppy Y chromosome evolve?

Abstract: The sex chromosome pairs of many species do not undergo genetic recombination, unlike the autosomes. It has been proposed that the suppressed recombination results from natural selection favouring close linkage between sex-determining genes and mutations on this chromosome with advantages in one sex, but disadvantages in the other (these are called sexually antagonistic mutations). No example of such selection leading to suppressed recombination has been described, but populations of the guppy display sexually… Show more

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Cited by 25 publications
(45 citation statements)
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References 71 publications
(171 reference statements)
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“…One may speculate that the absence of color-related loci on the Y-chromosome of M. picta is a consequence of its genetic degeneration. Given the heavily debated and unresolved evolutionary history of the sex chromosomes in guppies [ 14 , 21 , 25 ], a similar study to the one conducted here on M. picta in the sister species M. parae is inevitable. Studies with natural populations are necessary to perform ecological and evolutionary analyses concerning population sizes and the fixation of structural chromosome alterations.…”
Section: Discussionmentioning
confidence: 97%
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“…One may speculate that the absence of color-related loci on the Y-chromosome of M. picta is a consequence of its genetic degeneration. Given the heavily debated and unresolved evolutionary history of the sex chromosomes in guppies [ 14 , 21 , 25 ], a similar study to the one conducted here on M. picta in the sister species M. parae is inevitable. Studies with natural populations are necessary to perform ecological and evolutionary analyses concerning population sizes and the fixation of structural chromosome alterations.…”
Section: Discussionmentioning
confidence: 97%
“…This has been explained by a different speed of decay and degree of recombination suppression [ 14 ]. Alternatively, a “rejuvenating” homologous turnover in the Acanthophacelus lineage is also possible [ 25 ]. To date, the data availability remains too limited to make definitive conclusions about the origin of the Y-chromosomes in both lineages [ 14 , 21 , 25 ].…”
Section: Discussionmentioning
confidence: 99%
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“…Full pairing is observed in other teleost species with more recently derived sex chromosomes. The guppy Y chromosome is recently derived [46] and fully pairs with the X chromosome [43]. 10 However, in this species homology between the X and Y chromosomes is much higher compared to the threespine stickleback.…”
Section: Discussionmentioning
confidence: 99%