F1 / F2 hybrids

Aad van Beek avbeek1@hotmail.com
Mon, 26 May 2014 13:19:26 PDT
This is triggered by pbs bx 360 where F2 was mentioned twice
7. Hippeastrum neopardinum x H. papilio, F2
16. Hippeastrum ‘Giraffe’ F2 x ‘Purple Rain’

So after reading wikipedia about hybrids a F2 is considered a self pollinated F1 and the offspring is not uniform but having all sorts of variation based on the gene combination from the parents and dominancy of genes.

But that leads to the more mysterious question when do I get F1 hippeastrum.  So let me give some examples.
1. Whenever I cross two species? Doesn't seem to concur with the notion of uniform offspring.
2. Whenever I cross the same species but from two separate gene pools most likely caused by geographical distance. So is Hippeastrum papilio F1 possible. To me this sounds strange as I would call the offspring also papilio species.
3. Same as 2 but then from neighboring plants, so most likely same gene pool. Still would call the offspring papilio species instead of putting F1 after it.
4. Whenever I cross two cultivars. Also like 1 this doesn't concur with notion of uniform offspring.
So in essence I can't come up with a scenario where the result is a F1. So what do I overlook.

Can anyone explain what I'm missing.

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