US-802 citrumelo

[Perplexed]

Citrus grandis 'Siamese' X Poncirus trifoliata 'Gotha Road' https://citrusvariety.ucr.edu/crc4266

When used as a rootstock it makes a vigorous tree and extremely large tree. I see that it's crossed with Siamese pummelo, which could either be the acidless version or the other siamese pomelo, as they have two accessions of siamese pomelo. It would be interesting to use this in crosses instead of dunstan since it may carry acidless in the gene pool if it uses the siamese acidless pomelo 🤔

[mikkel]

looking at these pictures I had the idea it might be a polyploid.
https://idtools.org/citrus_id/index.cfm?packageID=1179&entityID=8884
I have a polyploid citrumelo chance seedling that grows like crazy. Even in my climate.

Anyway, if 802 is from Siamese Sweet, it sounds interesting for breeding. But I rather suspect that it is a standard Siamese offspring (but that's just an idea I had when I read about it on the internet).

Probably hard to get? or can you order it from UCR?

[Perplexed]

Hard to get, not listed as available from UCR. I have a tree I bought from a nursery that is actually using this as the rootstock, but the tree is a Trifoliate+Satsuma. Not gonna decapitate it for US 802.

[caladri]

No viable buds on the rootstock which you could bud onto something else?

[a_Vivaldi]

Perplexed, I have a satsuma from the same nursery I suspect, as it's on US-802. This spring the rootstock put out two strong suckers. I'm either going to let them grow and fruit, or take material and graft that into something else. Either way, I'm thinking I'll have some US-802 fruit to test in a few years.

[caladri]

CCPP has US-802 as VI 1499, and should have budwood available at some point in the not-too-distant future, albeit not available for ordering as-yet.