Citrus > Cold Hardy Citrus

F2 Citrandarin (X-639) winter hardiness trial

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mkono:
Taking inspiration from Kumin, I am starting my own F2 trial in Zone 6b.

Lyn citrus seed has X-639 seed available, which is a Citrandarin with Cleopatra mandarin parentage. This is similar to US 1281 and 1282. My thought is to buy ~8,000 seed to start under low tunnels in the spring. This should hopefully give me ~800-1600 zygotic seedlings that I will expose to our winter temps. My hope is that, due to the mandarin parentage, I will see a somewhat larger percent survival rate than Kumin did with his citranges. But time will tell.

My goals are pretty small with this project - I'm really just looking for a slightly improved trifoliate orange. I hope to use it as a learning experience that could be applied to other, more long-term projects that would involve poncirus+ (if I can get a hold of it!).

Any advice/thoughts are appreciated! I intend to update this thread as things progress.

caladri:
This is the way! Good luck!!

a_Vivaldi:
What method will you use to discriminate between zygotic and nucellar seedlings?

caladri:

--- Quote from: a_Vivaldi on February 20, 2024, 03:27:52 PM ---What method will you use to discriminate between zygotic and nucellar seedlings?

--- End quote ---

X639 should not be hardy enough to survive in Pennsylvania, I would think, and so selection would kill the nucellar seedlings?

a_Vivaldi:
Ah ok, that makes sense. Very nice!

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