From what I’ve read and researched both parents give 50% of their genetics to the offsprings and each will have recessive traits. With that said, I’ve had a excellent female and a not so excellent male produce offsprings that I was looking for than a excellent female and excellent male. I know the males that you would ultimately be looking for are the ones that let the mom shine through and not run all over the females and that take a lot of testing of the offsprings.
If you’re not looking to line breed then you could always back cross to Heirloom #21up to 3 generations (bx3) to get very close to where you want to be.
In this particular case I’d just go with Heirloom 21 as the mom because it’s easier to pick a mom than the dad.
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