R. acicularis part 2

Thought I would split this post up a little bit.

I noticed that Skinner has crossed R. acicularis(sayi I am assuming) with a tetraploid. I would think this would have interesting results. I would think we have sterile plants or at the very best, plants hard to work with would be the result. I did notice there were some second generation plants from one of these crosses.

R. spinosissima altaica x R. acicularis is one such cross. It yelded a plant called Altalaris which has 1 offspring, William Godfrey.

Am I right in thinking that this plant would have 35 chromosomes? A am assuming thre results of this kind of cross are similar to a diploid x tetraploid. Mostly sterile but with some chances of having viable pollen. Then again, maybe not as Altalaris is the seed parent of William Godfrey. Not sure what to think about this.

Any comments on this?

Just when you think you have a handle on this, I’m going to point out that there is a tetraploid form of R. acicularis ( var niponensis ). I think there is even a diploid form, but I may be incorrect.