This study highlights the importance of gene flow to avoid inbreeding after severe bottlenecks. However, bottlenecks still cause a loss of unique alleles, which might affect a population's ability to adapt to future challenges.
Amanda Lindahl
Our results suggest that male-mediated gene flow after the bottleneck, mainly from northern to southern Scandinavia, helped keep inbreeding levels low and maintain individual genetic diversity in the population. Go male bears!
We analyzed whole genome data from bears before and after a severe bottleneck that occurred ca 100 years ago. Interestingly, although the population was reduced by ca 97%, individual genome-wide heterozygosity and inbreeding levels appear similar in bears before and after the bottleneck
Check out our bear-y cool paper about Scandinavian brown bears published today in Royal Society Open Science!🐻 More about it in the thread🧵 @cpgsthlm.bsky.social
doi.org/10.1098/rsos...
Thanks to the brown bear team!
@edanalord.bsky.social, @jcchacond.bsky.social, @fravasini.bsky.social, Ioana Meleg, George Xenikoudakis, Erik Ersmark, Bilal Sharif, @tvdvalk.bsky.social, @lovedalen.bsky.social, Isabelle Feinauer
Amanda Lindahl
Amanda Lindahl
Congratulations to @amandalindahl.bsky.social for successfully presenting her research in the Half-Time PhD seminar titled ”All Things Rodents: Exploring Sex Ratios and Population Structure Across Time“! 🐀🧬⏳ Many thanks to the committee!
Abstract. After the last ice age, the brown bear (Ursus arctos) recolonized Scandinavia, likely from two different source populations, resulting in two sub
It’s always been a mystery to me how the genetic diversity and composition of the Scandinavian brown bear originated 🤔
Today, we publish a new paper that sheds new light on this, and a real-time example of how mito-nuclear discordances can evolve during severe bottlenecks:
doi.org/10.1098/rsos...
Amanda Lindahl
The Scandinavian brown #bear population nearly went extinct in the early 1900’s due to human overhunting. Using data from museum specimens and modern bears, this #RSOS assesses the genomic consequences of this severe population decline: doi.org/10.1098/rsos... @amandalindahl.bsky.social
Trots att brunbjörnen nästan utrotades i början på 1900-talet så har varken inavelsgraden eller individernas genetiska variation påverkats. Detta överraskande resultat kan troligtvis förklaras med genetiskt utbyte via vandrande hanbjörnar. Studie från @cpgsthlm.bsky.social
www.su.se/nyheter/nyhe...
How did catastrophic black death and myxomatosis outbreaks on an isolated island affect the genomes of humans & rabbits, respectively?
And how did the microbes evolve in response to this?
PhD position @cpgsthlm.bsky.social with Anders Götherström and me as supervisors!
su.varbi.com/en/what:job/...
