Lineage selection

Hi

I am planning to use "lineage" selection in my EA for pairing cross-overed
individuals.
Idea is my own, so I am asking if somebody here knows any research allready
done this area.
I think it is very biologically oriented way to pair individuals.

I came this idea when I thoug that I should not cross-over ants and
elephants. So if I want to have one big population in my simulation but
support different species only way I see to do it is calculate structural
difference or do it lot more simple way and calculate "how far" relatives
two individuals are.

Any ideas how should I calculate fast/easy/small_memory_usage way how far
two "relatives" are?
In my current implementation http://sourceforge.net/projects/narugo I try to
keep individual relative trees but I am considering simpler and more
effective way.

I see it biologically realistic crossover individuals close to 3-100
relative steps so that possibility goes very small after 100.

t. Harri


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