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Messages - Ilya11

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1
Eventually these branches will die, but if the rootstock is vigorous and still growing you will probably have this curiosity for some time.

2
With  few exceptions variegated plants are periclinal chimers, albino seedlings in this case come from an embryonic layer  deficient in the ability to synthesize  chlorophyll. 

3
In most cases albino seedlings come from  infection by Alternaria fungus.

4
Cold Hardy Citrus / Re: Yuzu Ichang Papeda cross
« on: May 10, 2021, 10:35:29 AM »
A very nice plant Robert. Does it give already the fruits?

5
Cold Hardy Citrus / Re: Yuzu Ichang Papeda cross
« on: May 06, 2021, 03:29:44 AM »
Funny you should say that. I know several people in Germany and Austria who say that their seedlings are more coldhardy than their plants that are grafted on Poncirus (and also hardier than Poncirus hybrids). I guess it depends on so many factors..

Partially agree with you, my experience with C.ichangensis is very difficult to interpret , its hardiness depends on more factors than that of poncirus. But up to now I have not seen any photos of mature pure ichangensis that survived long term in the Northern part of Europe.

6
I liked this comment under the video:
Tymoteusz Babiński
In Soviet Russia oranges eat you
  :'(

7
Citrus General Discussion / Re: Orange Pollen: is it sterile ?
« on: March 17, 2021, 02:59:19 PM »
I am not aware of any triploid varieties of true oranges.

8
Citrus General Discussion / Re: Orange Pollen: is it sterile ?
« on: March 16, 2021, 09:18:07 AM »
Most of oranges with an exception of navels have fertile pollen.

9
Cold Hardy Citrus / Re: F2 citrange winter hardiness trial
« on: February 28, 2021, 03:54:32 AM »
Do not have much experience with its open pollinated seedlings, but in crosses occasionally there are  some deciduous plants.

10
Cold Hardy Citrus / Re: F2 citrange winter hardiness trial
« on: February 27, 2021, 02:39:59 PM »
5star is exceptionally resistant to the bark damage.

11
Cold Hardy Citrus / Re: Is precociousness inherited?
« on: February 27, 2021, 04:18:06 AM »
Attempts in China to transfer this trait from their precocious clone failed.
My hybrids of Laaz clone with 5star are 3  years old and have not flowered yet. Last year I also crossed it  with another poncirus ( SwampLemon).

12
Cold Hardy Citrus / Re: tetraploid seedlings or plants - how to recognize
« on: February 22, 2021, 05:44:48 PM »
First of all we were dealing with poisonous effects of colchicine, that are certainly negligible at the concentrations used for the induction of polyploidy. Also, high osmotic conditions due to the presence of lactose excipient will probably enhance penetration of colchicine into cells

13
Cold Hardy Citrus / Re: cold hardy citrus in full soil in greenhouse
« on: February 21, 2021, 09:46:08 AM »
 I guess that with proper ventilation and shading you can avoid +50C in the greenhouse. Most citruses will not survive such heat.
As to the winter, unheated greenhouse is not particularly effective under long anticyclonic freezes. Kumquats are rather hardy, but only at   vegetation rest. They are late and fruits will be damaged before ripe.

14
Cold Hardy Citrus / Re: tetraploid seedlings or plants - how to recognize
« on: February 20, 2021, 05:14:50 PM »
So, take 5 pills (5 mg), that is what is being used for two and a half  days as a medication, dissolve them in 1 ml of water to have 0.5% of final solution.
 
"Colchicine, in the form of the autumn crocus (Colchicum autumnale), has been used as early as 1500 BC to treat joint swelling.[8] It was approved for medical use in the United States in 1961.[9] It is available as a generic medication in the United Kingdom.[6] In 2017, it was the 201st-most commonly prescribed medication in the United States, with more than two million prescriptions.[10][11"

15
Cold Hardy Citrus / Re: tetraploid seedlings or plants - how to recognize
« on: February 16, 2021, 04:40:08 PM »
Colchicine is not known for its cancerogenicity, it is an authorized medicament to treat gout and several other diseases.

16
Cold Hardy Citrus / Re: F2 citrange winter hardiness trial
« on: February 13, 2021, 10:17:19 AM »
In a summer they are only slightly curvy, while as of today , after  a night at -9.5C they are almost tubular.
I guess this is a sign of cold hardiness adaptation connected with  ability to diminish the surface of water loss.Grapefruit and orange leaves  are not showing this and stay flat until the lethal damage.

17
Cold Hardy Citrus / Re: F2 citrange winter hardiness trial
« on: February 13, 2021, 09:05:44 AM »
This is a matter of numbers.
From my experience if you are able to raise ~200  zygotes from a backcross of F1 plant , there is at least a dozen that are as hardy as an original F1.

18
Citrus General Discussion / Re: monoembryony inheritance question
« on: February 13, 2021, 09:00:28 AM »
Limequat Eustis gave many zygotic seeds.

19
Cold Hardy Citrus / Re: F2 citrange winter hardiness trial
« on: February 10, 2021, 04:17:19 AM »
Kumin,
What were the lows inside this frame?

20
Citrus General Discussion / Re: monoembryony inheritance question
« on: February 03, 2021, 10:59:39 AM »
The varieties that you have used as  mother parent are largely nucellar.
Pollination results in the formation of a zygote secreting  growth factors that induce the formation of  a variable number of nucellar embryos.
This capacity as well as vitality of zygote embryo depends on its genetic composition that comes from both parents.
In many cases nucellar embryos  overgrow the zygote that dies.
That is why the presence/absence of a zygotic seedling and the variable number of nucellar ones  depends on both parents in such crosses.

21
Citrus General Discussion / Re: monoembryony inheritance question
« on: January 30, 2021, 04:04:19 AM »
It served in the past for the preservation of varieties since most of propagation was done by grains.

22
Citrus General Discussion / Re: monoembryony inheritance question
« on: January 29, 2021, 05:22:21 PM »
It seems that there is an idea about monoembryony quality of trees transferring to the offspring when the tree is used as the female parent.  Does  monoembryony transfer in that way?  Any ideas on how it segregates in mono x polyembryonic crosses?

No, polyembryonic feature is not inherited only from a female parent. It is determined by few codominant genes located in nuclear genome.
link
also
more

23
Citrus General Discussion / Re: Non-acidic orange
« on: January 15, 2021, 08:43:43 AM »
Vaniglia is slightly bitter and initially has some acid.
In Maghreb Meski orange landrace is more common. I have one seed grown plant from Tunis  that gives fruits without any acid even in September when they are still green and  small.
Acidless oranges are revolting to  people who expect a normal orange taste, but with the time I  found them rather attractive having a unique, banana like smell.

24
Cold Hardy Citrus / Re: Changsha mandarin opinions
« on: January 12, 2021, 10:15:32 AM »
Thank you. Actually trifoliate leaf form is determined by several codominant genes.

25
Cold Hardy Citrus / Re: Changsha mandarin opinions
« on: January 11, 2021, 12:36:37 PM »
Could you tell us what kind of hybrids you managed to produce with them, please.

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