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Messages - Jibro

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Cold Hardy Citrus / Re: F2 citrange winter hardiness trial
« 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...

Cold Hardy Citrus / Re: N1triVoss
« on: July 20, 2020, 01:11:51 PM »
I found three N1Tri Voss seedlings with "trifoliate only" leaves from 36 seedlings. No one from these looks like pure poncirus, they have longer leaves like some F1 poncirus hybrid.

If one parents of N1 Tri Voss was Poncirus, I would expect more seedlings with trifoliate leaves in F2 generation and maybe some with leaves like pure poncirus... it looks like pollen parent of N1Tri Voss may be citrumelo or other poncirus F1 hybrid...

But if you cut them near the ground, there is a chance that new emerging  growths  will flower on the tops next spring.
I may try cut it next spring and cutted stem graft to some strong rootstock, I am not sure where to cut it, below first pair of leaves or above?

Cold Hardy Citrus / Re: N1triVoss
« on: July 20, 2020, 05:37:06 AM »
5 month old seedling N1 Tri Voss has first flower  :). I had got N1 Tri Voss fruits from Petr Broza, he is growing N1 Tri Voss in big greenhouse with many other citrus varieties, so this seedling may be also hybrid from open pollination...

Cold Hardy Citrus / Re: F2 citrange winter hardiness trial
« on: July 20, 2020, 05:23:37 AM »
You can read about Tetraploid plant identification here:

Chromosome counting can not be done easily without special fixings, stains and rather powerful microscopes.
The easiest "kitchen" methods for ploidy determination is comparative measuring of leaf stomata replicas
with the help of nail polish (colorless) and a microscope (x40 - x100 will do). You apply the nail polish on a clean dry leaf, wait for it to dry and the peel it off. Afterwards you mount the peeled nail polish on a slide and cover with glass slip.

I've been thinking about crossing Tetraploid poncirus with regullar poncirus, both with better taste and select triploid seedless more edible poncirus, but I am not sure if it's possible without in vitro technic Embryo rescue and how to idntify triploid one...
Your Conestoga 011 may be good seed parent for similar purpose...

I may have several tetraploid poncirus seedlings and two poncirus clones with better taste have also short, wide petiole: " Sladka" and "Poncirus Plus"

"Sladka" also have very thick and bumpy rind, this should by another sign of tetraploid:

Cold Hardy Citrus / Re: F2 citrange winter hardiness trial
« on: May 18, 2020, 03:44:53 AM »
Growth habits of several Poncirus/Poncirus hybrid seedlings:

Conestoga 010: deciduous, hardy plant, small  leaves.

Conestoga 011: deciduous, very hardy plant, strong, open branches. Twin thorns frequent, small-medium leaves with wavy edges.

These two looks almost like pure poncirus to me, the leaf in the middle is shorter than usual F1 hybrid with trifoliate, the same cold hardiness as poncirus is another sign, that these are much more close to poncirus than orange...
Conestoga 011 reminds me one of my Tetraploid poncirus, shorter  petiole, wider leaves with wavy edges are one of the sign of tetraploid.

a| Tetraploid poncirus, b| regular diploid poncirus

Citrus General Discussion / Re: Honikan mandarin
« on: October 30, 2019, 04:42:03 PM »

My idea is too, that it is most likely a misspelled name.
Btw.: Aomikan is  cultivar, or it is just name for unripe mandarin?
Ao mikan 青みかん is name for unripe green mandarin -
Ao, literally means blue, but in the case of aomikan it means green. Japanese often don’t differentiate between blue and green clearly.
Mikan only stay ‘ao’, green naturally for a short time, so this is the time to enjoy them!

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