Phylogenetic analysis of the fast-evolving SuUR gene in insects

Yurlova, A. A.; Makunin, Igor V.; Жимулев, И. Ф.

doi:10.1134/s1022795410090309

Cited by 1 publication

(4 citation statements)

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“…Although underreplication is known to occur across Diptera (Yurlova et al. 2010), it is unknown to what extent thoracic underreplication occurs across the insect tree of life. Thoracic underreplication was not found in tested Chymomyza species or in Scaptodrosophila lebanonensis , Scaptodrosophila pattersoni , and Scaptodrosophila stonei (Table S1).…”

Section: Discussionmentioning

confidence: 99%

“…To explore this phenomenon, thoracic replication values have been reported for females of 132 species and males of 123 species within the Drosophila genus (Table S1). Although underreplication is known to occur across Diptera (Yurlova et al 2010), it is unknown to what extent thoracic underreplication occurs across the insect tree of life. Thoracic underreplication was not found in tested Chymomyza species or in Scaptodrosophila lebanonensis, Scaptodrosophila pattersoni, and Scaptodrosophila stonei (Table S1).…”

Section: Discussionmentioning

confidence: 99%

“…When SuUR is nonfunctional, replication of heterochromatin is nearly complete, and when overexpressed, more heterochromatic regions were underreplicated (Zhimulev et al 2003). This protein was found to be "fast-evolving" when comparing across Drosophila species, and orthologs could be found in mosquito species, but not outside of Diptera (Yurlova et al 2010). This suggests that this phenomenon within insects is exclusive to flies.…”

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confidence: 96%

“…This protein was found to be “fast‐evolving” when comparing across Drosophila species, and orthologs could be found in mosquito species, but not outside of Diptera (Yurlova et al. 2010). This suggests that this phenomenon within insects is exclusive to flies.…”

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Thoracic underreplication inDrosophilaspecies estimates a minimum genome size and the dynamics of added DNA

et al. 2020

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Many cells in the thorax of Drosophila were found to stall during replication, a phenomenon known as underreplication. Unlike underreplication in nuclei of salivary and follicle cells, this stall occurs with less than one complete round of replication. This stall point allows precise estimations of early‐replicating euchromatin and late‐replicating heterochromatin regions, providing a powerful tool to investigate the dynamics of structural change across the genome. We measure underreplication in 132 species across the Drosophila genus and leverage these data to propose a model for estimating the rate at which additional DNA is accumulated as heterochromatin and euchromatin and also predict the minimum genome size for Drosophila. According to comparative phylogenetic approaches, the rates of change of heterochromatin differ strikingly between Drosophila subgenera. Although these subgenera differ in karyotype, there were no differences by chromosome number, suggesting other structural changes may influence accumulation of heterochromatin. Measurements were taken for both sexes, allowing the visualization of genome size and heterochromatin changes for the hypothetical path of XY sex chromosome differentiation. Additionally, the model presented here estimates a minimum genome size in Sophophora remarkably close to the smallest insect genome measured to date, in a species over 200 million years diverged from Drosophila.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

mentioning

confidence: 96%

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confidence: 99%

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