Evolution/selection experiments

What long-term experiments/studies/programs have been done on evolution and selection? I’ve read about the long-term E. Coli evolution experiment, but this seemed rather “undirected”, and I suppose rather than “natural” (undirected) selection, I’m talking about “artificial” or “directed” selection. For example- has any scientist bred generation after generation of rat, selecting only the largest (or smartest, or whatever), to see how large (smart etc) rats can get?

One long-term “study” that I think fits what I’m asking for is the Tame Silver Foxbreeding program. Are there others?

Yes, there are tons. This is getting to be a more-or-less routine methodology to look at, well, evolution, as well as a handful of other questions. I was at a conference not long ago where I heard about an experiment with fruit flies evolving at different temperatures, resulting in their cell membrane compositions changing.

What I’m really asking for, of course, is what are the cool ones :slight_smile:

Probably most human-directed selection programs are often called “agriculture”, “animal husbandry” or “dog/horse/X breeding”. Amazing how much more productive modern corn is than its wild ancestor, and how dog breeding has resulted in such diversity.

Oh, yeah. Lots of Lab Mice strains have been developed that “breed true” for a trait or traits.

There’s a fruit fly experiment that’s been running in Japan for almost 60 years. 1400 generations of flies have been raised in complete darkness.

And Darwin specifically mentioned this as examples of descent with modification and natural selection.

Can horses, dogs, and X all breed with each other?

:wink:

With X, they think they can!