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Author Topic: F2 citrange winter hardiness trial  (Read 23204 times)

Jibro

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Re: F2 citrange winter hardiness trial
« Reply #275 on: July 25, 2020, 02:37:16 AM »
(Of course, you will actually have to grow the seedling until it becomes big enough to fruit, to determine that)

And that is problem, even if I get only 10 fruits from crosspolination, it's about 300 seeds with no way to select hybrids from nucellar clones (if you cross poncirus x poncirus) until they start fruiting and it took 8-10 years in my zone 6....with high probability one extreme winter, which may kill even older poncirus.

Very interesting post, jibro. Do you do Citrus breeding? If so, have you developed any selections?

I have no "big plans" for citrus breedings, I just collected more edible poncirus clones and I want to test them all in the same conditions to determine if they really have better taste...

I may try some crosses with orange or mandarine varieties, because I am curious if these "more edible" poncirus clones can create F1 poncirus hybrids with better tasting fruits than existing citrumelo and citrange...
This year i tried pollinated my fruiting poncirus with Ponderosa pollen because I am curious if some of them may produce hybrids as mother and I also have one fruit from more edible FD pollinated with Citrumelo 5*.
My biggest "success" so far is one very dwarf Flying Dragon seedling from 2017, it had first 3 flowers this spring and it has more flower buds again, so it looks like I found another precocious clone...

kumin

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Re: F2 citrange winter hardiness trial
« Reply #276 on: July 25, 2020, 04:40:39 PM »
 Current photos of recent outdoor high grafts on Poncirus, as well as grafts on 1 year Poncirus.

Photos of the interior of the cold frame housing 1 1/2 year old grafted clones of the original survivors & 2 1/2 year old original surviving seedlings.




Recent outdoor high grafts of TaiTri, 5* citrumelo, and various Conestoga selections.


A few of 440 recent grafts on Poncirus year old seedlings. There are 8 seedlings per pot.


Conestoga #001 high graft on Poncirus needs support due to very rapid slender growth.
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More recent outdoor grafts on fruiting age Poncirus.
[url=https://postimg.cc/CzR7KrQY]


2nd year graft of Conestoga #011 on fruiting age Poncirus, hopefully it'll flower in 2-3 years.




« Last Edit: July 26, 2020, 07:16:20 AM by kumin »

vnomonee

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Re: F2 citrange winter hardiness trial
« Reply #277 on: August 06, 2020, 02:12:10 PM »
Quote
I have no "big plans" for citrus breedings, I just collected more edible poncirus clones and I want to test them all in the same conditions to determine if they really have better taste...

Are there any large scale citrus breeding programs using Poncirus+ (reduced/without bitterness) to recreate/improve all of the "bad tasting" hybrids that already exist?

kumin

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Re: F2 citrange winter hardiness trial
« Reply #278 on: August 06, 2020, 03:15:31 PM »
I'm not aware of many Poncirus+ trees in the US, especially in regards to mature, fruiting trees. This should not be a major obstacle, as well grown Poncirus fruits rather young. I've been in the process of grafting juvenile phase Poncirus+ on year old seedlings, I'm uncertain as to the success rate, but I should know shortly.

Answering your question a bit more directly, this would be a great project for someone with a collection of various zygotic cultivars, used as maternal, or paternal parents. Walt has suggested doing exactly what you're proposing.

I would love to see young people getting involved with cold hardy Citrus breeding. Realistically, some of us have collected, selected, or created selections that while not reaching all of the goals we're seeking, may provide valuable breeding material for further advances.

 

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