Intriguing: modeling and empirical data support that after whole genome duplication (autotetraploids) genetic variation rises, and mutation load increases because deleterious mutations are masked by additional chromosome copies
https://www.biorxiv.org/content/10.1101/2025.01.12.632621v1
#WholeGenomeDuplication #paralog #MolecularEvolution #PopulationGenetics #Arabidopsis

Very nice preprint on most-diverged vs. less-diverged ortholog among paralog pairs: https://www.biorxiv.org/content/10.1101/2024.10.29.620890v1 @dessimoz #ortholog #paralog #MolecularEvolution

Updated preprint of work by Tina Begum et al showing that paralogs from small-scale duplications have jumps in expression phenotype, much more than orthologs or whole genome duplication paralogs
https://www.biorxiv.org/content/10.1101/2023.12.29.571877v2 #ortholog #paralog #phylogenetics #GeneExpression #MolecularEvolution #FishEvolution

Registrations open to our @SIB course for PhD students in Lausanne 🇨🇭 with @rmwaterhouse and @dessimoz :
Biodiversity bioinformatics: from large-scale phylogenomics to gene families and functions
with @bgeedb, OMA and BUSCO inside
https://www.sib.swiss/training/course/20240828_COMGE #BiodiversityGenomics #MolecularEvolution #ortholog #paralog #bioinformatics

We posted this cool preprint between Xmas and new year, now time for a thread about the results: Begum et al "Phylogenetic modeling provides evidence for sudden shifts in expression after small-scale duplication in vertebrates and strong support for the ortholog conjecture"
https://www.biorxiv.org/content/10.1101/2023.12.29.571877v1
#paralog #ortholog #GeneDuplication #GenomeDuplication #MolecularEvolution #phylogeny #ohnolog

Marjorie Liénard: method to express invertebrate opsin proteins in vitro, allowing to show spectral shifts in opsins in butterflies, with notably 2 paralogs of LW providing differentiation in function between the dorsal and ventral parts of the eye https://www.pnas.org/doi/abs/10.1073/pnas.2008986118 #SMBE2023 #opsin #GeneDuplication #paralog

Carlos Cortez shows how a single mutation was sufficient to evolve Hb from a tetramer to a dimer. How does specificity of heterotetramer evolve? 2 deletions and 1 substitution in one of the 2 paralogs are sufficient. Overall, evolving heterotetramer complex from identical at birth paralogs is remarkably simple. #SMBE2023 #paralog #duplication

Announcing #SIB Comparative genomics course, taught by Christophe Dessimoz, Natasha Glover, @rmwaterhouse and myself, 30 August - 01 September in Lausanne #UNIL
• Introduction to molecular evolution & phylogenetics
• Orthology-focused arthropod comparative genomics
• Duplication of genes and genomes, expression
with #SIB resources #OMA, #Orthodb #BUSCO and @bgeedb #ortholog #orthologs #paralog #duplication #MolecularEvolution #Genomics #bioinformatics #training @P_Palagi https://www.sib.swiss/training/course/20230830_COMGE

Bgee used to support the identification of the target gene for depletion experiment in zebrafish: https://elifesciences.org/articles/83652
#zebrafish #cytoskeleton #ortholog #paralog #GeneExpression #SIB @dee_unil @marcrr