This conversation on PRI’s On Point discusses many issues surrounding transgenic salmon, including biological, conservation, and ethical ones. It presents two good case studies for transgenics.
Biochemistry of digesting transgenes & transgene products
Gene flow, fitness effects of transgene on wild populations
Gene flow, conservation issues and suggested solutions
Transgenics: AquaBounty Salmon and the Enviropig
Hybrid The History and Science of Plant Breeding by Noel Kingsbury University of Chicago Press, Chicago, 2009.
Reviewed in Science: http://dx.doi.org/10.1126/science.1192333
Moss spores can travel far–if they get several centimeters up into the turbulent air layer. Researchers find that spore capsules in a moss explode with a specific vortex effect, getting the job done. This is a super cool example linking a physical trait to a behavior that affects dispersal. To complete this example, one needs to link dispersal to fitness, and that could depend on environment, demography, and population genetics. If that’s turns out to be simple, this is a great case.
Mosses are also linked to the topic of the evolution of land plants. This trait could be used to explore balancing selection, since early water-dependent moss that dispersed far could hit dry land. Of course, this would also be true today.