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Evolution of cooperation +/or selfish behavior

Evolution of cooperation +/or selfish behavior. System: Myxococcus xanthus Primary Investigator: Greg Velicer. Myxococcus xanthus. http://cmgm.stanford.edu/~kaiserla/about_myxo/about_myxococcus.html. Adventurous motility Social motility Gliding motility Development of spores.

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Evolution of cooperation +/or selfish behavior

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  1. Evolution of cooperation +/or selfish behavior • System: Myxococcus xanthus • Primary Investigator: Greg Velicer

  2. Myxococcus xanthus http://cmgm.stanford.edu/~kaiserla/about_myxo/about_myxococcus.html • Adventurous motility • Social motility • Gliding motility • Development of spores

  3. Motility can be A = adventurous or S = social • A motility = dependent upon gliding and slime extrusion • S motility = dependent upon type IV pili

  4. First experimental evo of Myxo • 12 populations, 6 RifR, shaking flasks, CTT (rich) media. • Inhibits social contact; mass-action

  5. But the selfish asocial evolved lineages cheat…

  6. Cooperation can evolve along multiple pathways

  7. Cooperation re-evolves using a new system • cglB = A motility gene • dsp = fibril producing gene

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