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Laura Ross @laurarossevo.bsky.social · Jun 16

Thanks @cecilecourret.bsky.social for this great perspective highlighting our recent paper on B chromosomes

Trends in Genetics @cp-trendsgenetics.bsky.social · Jun 16

"Selfish B chromosome evades genome elimination"
by Cécile Courret (@cecilecourret.bsky.social)

This Spotlight highlights recent work by Laura Ross (@laurarossevo.bsky.social) & colleagues in GBE (@genomebiolevol.bsky.social).

FREE till Aug 5th with this link:
authors.elsevier.com/a/1lH50cQbJF...

Figure 1. (A) During male meiosis, mealybugs undergo paternal genome elimination (PGE), where paternally inherited chromosomes become heterochromatinized and are excluded into degenerating nuclei, while maternally inherited chromosomes are retained in functional sperm.

(B) During female meiosis, the B chromosome follows standard Mendelian inheritance. In males, when maternally inherited, it behaves like other maternal chromosomes and is transmitted through functional sperm. Strikingly, when paternally inherited, the B chromosome escapes elimination by decondensing during meiosis, adopting a euchromatic state similar to that of maternal chromosomes, and co-segregates with them into the functional sperm nucleus.

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Laura Ross @laurarossevo.bsky.social · Jun 11

Great introduction to one of my favorite study organisms, and to promote our recent study into how their unusual genetics affects patterns of molecular evolution.

Andrew Mongue @ajmongue.bsky.social · Jun 11

Re-upping this thread on PGE in mealybugs because the results are finally published in Molecular Ecology:
onlinelibrary.wiley.com/doi/10.1111/...

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Reposted by Laura Ross

Andrew Mongue @ajmongue.bsky.social · Jun 11

It's finally out! This paper took quite a while but I'm so excited to share now! For anyone who studies sex chromosomes, take note: we found a rare "slower X"! (dN/dS_X < dN/dS_Autos) 👀

Andy Gardner @andygardner.bsky.social · Jun 11

New paper: "Faster adaptation but slower divergence of X chromosomes under paternal genome elimination" (Open Access)

w/ Robert Baird, @imprintedgene.bsky.social‬, Jan Ševčík, Katy Monteith, @laurarossevo.bsky.social‬ & @ajmongue.bsky.social‬

www.nature.com/articles/s41...

‪@natcomms.nature.com‬

Faster adaptation but slower divergence of X chromosomes under paternal genome elimination - Nature Communications

X chromosomes evolve faster than autosomes, but confounding factors make this a difficult phenomenon to study. Utilising the unusual sex determination system of Sciaridae flies, this study finds a slo...

www.nature.com

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Reposted by Laura Ross

Andy Gardner @andygardner.bsky.social · Jun 11

New paper: "Faster adaptation but slower divergence of X chromosomes under paternal genome elimination" (Open Access)

w/ Robert Baird, @imprintedgene.bsky.social‬, Jan Ševčík, Katy Monteith, @laurarossevo.bsky.social‬ & @ajmongue.bsky.social‬

www.nature.com/articles/s41...

‪@natcomms.nature.com‬

Faster adaptation but slower divergence of X chromosomes under paternal genome elimination - Nature Communications

X chromosomes evolve faster than autosomes, but confounding factors make this a difficult phenomenon to study. Utilising the unusual sex determination system of Sciaridae flies, this study finds a slo...

www.nature.com

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Laura Ross @laurarossevo.bsky.social · Feb 1

collaborative effort involving almost all previous postdocs in the lab and many years, but it is out and it is a great story! @kamilsjaron.bsky.social @ajmongue.bsky.social and many others

KamilSJaron.bsky.social @kamilsjaron.bsky.social · Feb 1

Our mealybug B chromosome paper is finally out, a small cross-generational gem from @laurarossevo.bsky.social's lab. academic.oup.com/gbe/article/...

A few interesting things we found 👇

The B Chromosome of Pseudococcus viburni: A Selfish Chromosome that Exploits Whole-Genome Meiotic Drive

Abstract. Meiosis is generally a fair process: each chromosome has a 50% chance of being included into each gamete. However, meiosis can become aberrant wi

academic.oup.com

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Laura Ross @laurarossevo.bsky.social · Jan 6

Anyone know if there is research on how post-Christmas grant deadlines disadvantage scientists with caring responsibilities? Or just mental health in general, due to not being able to switch off during this period? Yes I am reaching peak burnout and so done juggling!

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Laura Ross @laurarossevo.bsky.social · Dec 14

Thanks, for putting this together! Would be great if you could add me

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Laura Ross @laurarossevo.bsky.social · Dec 11

Extremely honoured that the @zslscience.bsky.social awarded me their scientific medal last night!

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Laura Ross @laurarossevo.bsky.social · Dec 7

2p...q?

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Laura Ross @laurarossevo.bsky.social · Dec 6

Congrats! That is fantastic news and very well-deserved

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