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Al Mikkelson wrote an article "Breeding To Improve Your Killies" in Killie Notes, April 1973, p. 11. He gives an outline how to fix in a fish desirable characteristics, or to breed out undesirable ones.The scheme is to select the best 4-5 pairs and to breed them AxB, BxC, CxD, etc. keeping strict track of their eggs.
In the next generation select the best fish from each pair and breed them with their cousins -- (AxB)x(BxC), (BxC)x(CxD), (CxD)x(DxE), (DxE)x(AxB).
Call the offspring of these fish A', B', C' and D' and repeat this all again, ie, A'xB', B'xC', C'xD', D'xA' and then (A'xB') x (B'xC'), (B'xC')x(C'xD'), (C'xD')x(D'xE'), (D'xE')x(A'xB').
Call these fish A'', B'', C'' and D''. Repeat.
Richard Sexton
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