[gurps] BioTech-- Eugenics Question

[Wyrm]

Jeff Murrell wrote:
> 
> Susan Koziel wrote:
>> There are indications with animal breeds that the same
>> effect occurs - that each species has a max level
>> within it's genome for certain things like size, IQ,
>> speed, etc. Much of these maximums have to do which
>> the sheer physical nature of our parts.

Over the last 15,000 or so years we have pretty much twisted out every 
every variation of Wolf -> Dog you can imagine. :)

> 
> Thoroughbred horses are an example of this.  Historically the average times
> of all race horses has been increasing but the record times have not
> increased significantly.
> 
> In the Ky. Derby for example Secretariat's 1973 record of 1:59 2/5 still
> stands.  The previous record was Northern Dancer's 1964 time of 2:00. The
> record in 1900 was 2:06 1/4. So in over 100 years (c.20+ generations)
> maximum speed has increased by 5.7%.

How much of this can be attributed to better feed, vet care and training 
though? 20 generations is not all that long.