Does it matter which line is used for the male?

I agree with what you said, guys.

Original FAQ answer is worthy updating… Maybe they have originally referred only to repeating IBL cross which should technically lead to same resulting offspring everytime repeated no matter which sibling you select from IBL.

But in general it is definitely same amount of “science” involved with selection of potential males for breeding as with females. There is good article by Mr.Soul about selecting parenthood:

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