![Page 1: Population genomics reveals multiple drivers of population differentiation](https://reader035.vdocuments.net/reader035/viewer/2022081604/587b7fea1a28ab9d448b4f0b/html5/thumbnails/1.jpg)
Population genomics reveals multiple drivers of population differentiation in a sex-role-
reversed pipefishSarah P. Flanagan, Emily Rose, Adam G. Jones
Texas A&M UniversityEvolution 2016
![Page 2: Population genomics reveals multiple drivers of population differentiation](https://reader035.vdocuments.net/reader035/viewer/2022081604/587b7fea1a28ab9d448b4f0b/html5/thumbnails/2.jpg)
Differences between populations: why do we care?
Variation is the substrate of evolution
![Page 3: Population genomics reveals multiple drivers of population differentiation](https://reader035.vdocuments.net/reader035/viewer/2022081604/587b7fea1a28ab9d448b4f0b/html5/thumbnails/3.jpg)
What causes population differentiation?
Neutral processes: genetic drift
Natural selection: local adaptation
Geographic variation in selection
F Jones et al. (2012), Nature Mobley & AG Jones(2012), Mol Ecol
What are the relative contributions of these processes?
![Page 4: Population genomics reveals multiple drivers of population differentiation](https://reader035.vdocuments.net/reader035/viewer/2022081604/587b7fea1a28ab9d448b4f0b/html5/thumbnails/4.jpg)
How do we detect these processes?
Morphology and measurable traits Genomic patterns
Hohenlohe et al. (2010), Int J Plant SciFlanagan et al. (2014), JEB
![Page 5: Population genomics reveals multiple drivers of population differentiation](https://reader035.vdocuments.net/reader035/viewer/2022081604/587b7fea1a28ab9d448b4f0b/html5/thumbnails/5.jpg)
Questions of Interest
• What is the relative importance of each process?
• Do morphological patterns of differentiation match genetic patterns?
![Page 6: Population genomics reveals multiple drivers of population differentiation](https://reader035.vdocuments.net/reader035/viewer/2022081604/587b7fea1a28ab9d448b4f0b/html5/thumbnails/6.jpg)
Syngnathus scovelli
![Page 7: Population genomics reveals multiple drivers of population differentiation](https://reader035.vdocuments.net/reader035/viewer/2022081604/587b7fea1a28ab9d448b4f0b/html5/thumbnails/7.jpg)
Syngnathus scovelli
Flanagan et al. (2014), JEB
![Page 8: Population genomics reveals multiple drivers of population differentiation](https://reader035.vdocuments.net/reader035/viewer/2022081604/587b7fea1a28ab9d448b4f0b/html5/thumbnails/8.jpg)
Syngnathus scovelli
• Expected low dispersal • Natural selection favoring
crypsis• Strong sexual selection
![Page 9: Population genomics reveals multiple drivers of population differentiation](https://reader035.vdocuments.net/reader035/viewer/2022081604/587b7fea1a28ab9d448b4f0b/html5/thumbnails/9.jpg)
Collecting
Chapter 1
![Page 10: Population genomics reveals multiple drivers of population differentiation](https://reader035.vdocuments.net/reader035/viewer/2022081604/587b7fea1a28ab9d448b4f0b/html5/thumbnails/10.jpg)
The approach
ddRAD-sequencing Morphological Characteristics
![Page 11: Population genomics reveals multiple drivers of population differentiation](https://reader035.vdocuments.net/reader035/viewer/2022081604/587b7fea1a28ab9d448b4f0b/html5/thumbnails/11.jpg)
Analzying RAD-seq Data
• Assembled reads into clusters and identified SNPs
• Created two sets of SNPS:– Pruned (1753)– All filtered SNPs (6348)
Catchen et al. (2011, 2013)
![Page 12: Population genomics reveals multiple drivers of population differentiation](https://reader035.vdocuments.net/reader035/viewer/2022081604/587b7fea1a28ab9d448b4f0b/html5/thumbnails/12.jpg)
Mantel test: p = 0.02
Neutral Population Structure
![Page 13: Population genomics reveals multiple drivers of population differentiation](https://reader035.vdocuments.net/reader035/viewer/2022081604/587b7fea1a28ab9d448b4f0b/html5/thumbnails/13.jpg)
Local Adaptation Outlier Loci
H ACA ribonucleoprotein complex non-core subunit NAF1
![Page 14: Population genomics reveals multiple drivers of population differentiation](https://reader035.vdocuments.net/reader035/viewer/2022081604/587b7fea1a28ab9d448b4f0b/html5/thumbnails/14.jpg)
Phenotypic differentiation
![Page 15: Population genomics reveals multiple drivers of population differentiation](https://reader035.vdocuments.net/reader035/viewer/2022081604/587b7fea1a28ab9d448b4f0b/html5/thumbnails/15.jpg)
![Page 16: Population genomics reveals multiple drivers of population differentiation](https://reader035.vdocuments.net/reader035/viewer/2022081604/587b7fea1a28ab9d448b4f0b/html5/thumbnails/16.jpg)
Conclusions• Neutral processes primarily drive genetic
differentiation– Although there is some evidence for local
adaptation• Phenotypic differentiation follows a different
pattern than genetic differentiation
![Page 17: Population genomics reveals multiple drivers of population differentiation](https://reader035.vdocuments.net/reader035/viewer/2022081604/587b7fea1a28ab9d448b4f0b/html5/thumbnails/17.jpg)
Acknowledgements
– Adam Jones– Emily Rose– Andrew Anderson– Kim Paczolt– Clay Small– Charlyn Partridge– Nicole Ortega– Heather Masonjones– Sawyer Masonjones– David Mahlmann– Emily Kasl– Melissa Giresi– Kevin Records– Alex Saucedo– William Cresko
![Page 18: Population genomics reveals multiple drivers of population differentiation](https://reader035.vdocuments.net/reader035/viewer/2022081604/587b7fea1a28ab9d448b4f0b/html5/thumbnails/18.jpg)
Migration rates
![Page 19: Population genomics reveals multiple drivers of population differentiation](https://reader035.vdocuments.net/reader035/viewer/2022081604/587b7fea1a28ab9d448b4f0b/html5/thumbnails/19.jpg)
![Page 20: Population genomics reveals multiple drivers of population differentiation](https://reader035.vdocuments.net/reader035/viewer/2022081604/587b7fea1a28ab9d448b4f0b/html5/thumbnails/20.jpg)
Bayenv Regions Associated with Environmental Variables GO categories