|2020-05-18 ||The insertion of a mitochondrial selfish element into the nuclear genome and its consequences|
Julien Y. Dutheil, Karin Münch, Klaas Schotanus, Eva H. Stukenbrock and Regine Kahmann
Recommended by Sylvain Charlat based on reviews by Jan Engelstaedter and Yannick Wurm
Some evolutionary insights into an accidental homing endonuclease passage from mitochondria to the nucleus
Not all genetic elements composing genomes are there for the benefit of their carrier. Many have no consequences on fitness, or too mild ones to be eliminated by selection, and thus stem from neutral processes. Many others are indeed the product of selection, but one acting at a different level, increasing the fitness of some elements of the genome only, at the expense of the “organism” as a whole. These can be called selfish genetic elements, and come into a wide variety of flavours , il...
|2017-01-24 ||Birth of a W sex chromosome by horizontal transfer of Wolbachia bacterial symbiont genome|
Sébastien Leclercq, Julien Thézé, Mohamed Amine Chebbi, Isabelle Giraud, Bouziane Moumen, Lise Ernenwein, Pierre Grève, Clément Gilbert, and Richard Cordaux
Recommended by Gabriel Marais and Sylvain Charlat
A newly evolved W(olbachia) sex chromosome in pillbug!
In some taxa such as fish and arthropods, closely related species can have different mechanisms of sex determination and in particular different sex chromosomes, which implies that new sex chromosomes are constantly evolving . Several models have been developed to explain this pattern but empirical data are lacking and the causes of the fast sex chromosome turn over remain mysterious [2-4]. Leclerq et al.  in a paper that just came out in PNAS have focused on one possible explanation: *W...