> But with at least three graphically captive populations ( USA,
> Australia/NZ and Europe) it may be possible to transfer genetic material
> from one group to another. To be successful it may have to be controlled
> in some way or another.
You cannot bring any rainbows into Australia from overseas.
> For you genetic experts, would it be possible to breed a "cross"
> with a pure strain, through a number of generations, so that all the
> offspring are pure?
No. You would always have some genes from the foreign species present.
Tootles
Peter J Unmack peter.unmack at asu.edu
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DESERT FISHES RULE: To boldly thrive where no other fish can make it!
Australian desert fishes pages at ozdesertfish.base.org (don't forget to
visit the Desert Fishes Council pages too)
Native Fish Australia pages at www.nativefish.asn.au
North American Native Fishes Association at www.nanfa.org