Show Posts

This section allows you to view all posts made by this member. Note that you can only see posts made in areas you currently have access to.

Topics - Ilya11

Pages: [1]
Cold Hardy Citrus / Citrus garden at 48.5N
« on: November 25, 2023, 03:55:02 AM »
Today night we got the first  ground frost, so I want to share some pictures showing the degree of ripiness.
All trees are in ground never protected.

Ichangstar60 have already dropped most of its fruits

SunkiXPT citrandarin


5star citrumelo

Dunstan citrumelo


Staruzu (5starXYuzu)

Cold Hardy Citrus / IchangensisXSinensis from B.Voss
« on: November 22, 2023, 08:16:30 AM »
Three years ago Bernhardt Voss kindly sent me the budwood of this hybrid.
I grafted it  to PT root. It does look very different from another variety that has a similar  name  and is rather widely accessible in Europe. I  have it and by my opinion it is a pure early orange.

This year Bernhardt hybrid flowered for the first time, fruits were almost ripe in the beginning of  November.

Fruits have orange-like fragrance , juice is abundant, not bitter, acid like that of lemon, 10 Brix.

Albedo is astringent, slightly bitter

Many seeds covered by pectin.

Cold Hardy Citrus / PT-plusXValentine cross
« on: November 16, 2023, 12:28:08 PM »
Probably succeeded to have it.
It was done with castrated  PTP flowers pollinated by Valentine pummelo. I tried also another way, but failed.
This year was supposed to be the last to try any cross with PTP, previously the seedlings although different in vigor were rather uniform in the shape of leaves and overall look alike.
Now only one third of them (I am germinating 85 seeds) look like those of poncirus, the rest are clearly different.

Putative nucellar seedling to the right. Red arrows point to the tiny unfoliate alternate first leaves typical for pure poncirus seedlings.

This year, after 6 years from crossing two of my Ichangstars (5starcitrumeloXCitrus Ichangensis are abundantly flowering for the first time

The first flower has 8 petals, fruity perfume, close to that of ichangensis

Another hybrid- 1232060 had one non complete flower last year, but hundreds of flower buds now

I pollinated the castrated flowers of 5star with C.ichangensis pink flower clone from Baches nursery in the spring of 2012 and around 70 zygotic seedlings were planted in the ground next year.
Around two dozens survived without protection, the two that bloom now had no damage during this period.

Interestingly, that while 1232061 is blooming on most of its branches, the flowers on 1232060 appear on the lower part, on twigs with nod count almost two times less those at the top  of the bush.

Cold Hardy Citrus / Citrumelo 5star in full bloom
« on: May 05, 2019, 04:31:43 AM »
This citrumelo is extremely decorative both in spring and the autumn, its perfume is so strong and good!
This year, because of rather mild winter it also kept some fruits from the the second, late summer flowering.

Cold Hardy Citrus / Poncirus fruit comparison
« on: November 22, 2018, 06:06:37 AM »
Below is a comparison of three poncirus varieties:

From left to right: Poncirus B.Voss-45 gram,  SwampLemon-41 gram  , PoncirusTrifoliata+ -41gram

Poncirus from B.Voss is almost all seeds (45), SwampLemon contains 21 seeds and PT+ 25seeds

After seed extraction:

Very small quantity of juice in classical poncirus, very high quantity of soluble matters (20 Brix), very acid, bitter oil emulsion

Swamp Lemon: 4 ml of juice, 9 Brix, acid, some bitterness, oils are present and stick to dents

PT+:  6 ml of juice, 10 Brix, acid, less bitter than SL, oils are probably there because of astringent taste, but do not stick to dents

I diluted all three juices with water to 5 Brix and kept them overnight in  refrigerator:

Poncirus Voss: acid, some bitterness, sharp taste, but not much revolting to three people who tasted it, sticky oils with typical poncirus taste are in yellow sediment

SwampLemon: taste more diluted, essentially the same appreciation as above, probably less bitterness and acidity, sticky oils are in yellow sediment

PT+ :  taste almost like white grapefruit but less sweet, some lemony note, sediment consists mostly of pulp membrane residues, may be some oils, but drastically less than in two previous cases.

For me these results are still inconclusive, especially in case of SwampLemon versus usual poncirus.

Cold Hardy Citrus / Ichanquat 6-7-2
« on: November 19, 2018, 05:25:15 PM »
This year the fruits are much larger than before

and the tree (more than 7 m high) soon will be a candidate for the tallest citrus in Europe

Cold Hardy Citrus / First fruits of Citrumelo 5star x Morton cross
« on: October 30, 2018, 11:09:42 AM »
This year at the end of May the first of the hybrids that I made  in 2011 by pollination of 5* citrumelo flowers by Morton Citrange flowered for the first time:

Most of the  flowers were defective without pistils, but eventually three fruits were formed

Fruits began to change color at the end of September, one of them looks ripe now

It is approximately of the size of poncirus fruit, has a pleasant outside odor resembling orange with fruity overtone, albedo is thick with some faint bitter taste, juice is sour like a lemon with no bitterness, no internal oils, no perceptible poncirus aftertaste. By taste it is close  to unripe orange.
I measured a sugar content - it had 13.5 Brix (Spanish clementine in parallel showed only 11)

This  plant (11_03_24) is very resistant, probably more than both of its parents. It is in open ground without any protection since 2012, never was damaged by snow and freezing temperatures under conditions when both 5* and Morton showed some leaf damage. It requires a lot of iron supplement in  spring  to avoid deficiency, otherwise is very healthy 2 m high bush with small largely monofoliate leaves.
Could be an interesting step toward a  hardy citrus with sweet taste.

Cold Hardy Citrus / N1triVoss
« on: October 18, 2018, 02:41:56 PM »
A very promising cold  hardy hybrid  produced by B.Voss in Hamburg.
It is believed to have C.ichangensis  and Poncirus as parents. Leaves are mostly monofoliate and that is why I think that  the story is more complex, could be citrumeloxichangesnsis. 
My plant is now more than 2 m high, planted in 2012, never protected, never damaged.
Dozens of rather large pear-sharpen fruits.

Skin is pleasantly lemon-like, although not strongly scented, albedo is moderately bitter, no poncirus taste or odor.
Around 20 large, ichangensis-like seeds.

Moderately juicy, less bitter than grapefruit, rather acid, but less than lemon.
Some fruity aftertaste is faintly present, but is is very different from poncirus.
Amazingly, at this stage the juice already contains  a lot of sugar: 11.5 of Brix, approximately the same as commercial clementines.

Citrus General Discussion / A new publication on mandarin domestication
« on: August 11, 2018, 10:17:54 AM »
A very instructive article on the process of mandarin diversification and domestication has been published recently

Genome of Wild Mandarin and Domestication History of Mandarin

They found a center of radiance of Citrus reticulata in Nanling mountains in South China, sequenced the genome of two wild plants in Mangshan region and used this information and previously developed markers of pomelo, C.ichangensis and  citron to identify two groups of domesticated  mandarins North and South of Nanling ridge.

Domesticated mandarins show a dramatic decrease in fruit citric acid content, while their sugar levels are not different from wild plants.

Mangshan mandarin ( different from Citrus mangshanensis also growing in this region) has already 1.7% of its genome introgressed from Ichang papeda, but almost no influence from pomelo or citron, while domesticated mandarins have up to 10% percent of genes from pomelo.

Satsumas are very different from both groups of Chinese mandarins and have 27% of introgressed pomelo, more than clementines with 18% of pomelo genes.
Mediterranean mandarin belongs to the South group of Chinese mandarins, while Changsha and  Ponkan are North mandarins.

Cold Hardy Citrus / moving and blocking
« on: May 01, 2018, 10:33:55 AM »
I do not understand why you are blocking some posts or moving them elsewhere?
What is an idea behind moving a report on this year hardy citrus survival to the main Tropical Fruit Form?

Citrus General Discussion / Pigmented Mexican limes
« on: September 16, 2017, 10:22:27 AM »
Anthocyanin containing  pigmented Mexican limes were produced in Florida by transgenic insertion of genes from red grape (Vitis):


 and Moro orange:   

Cold Hardy Citrus / 17-11 pummelo x citrumelo hybride
« on: May 01, 2017, 04:12:07 AM »
Do we know what happened to this interesting hybrid?
I has not be able to find any further information on it.
In  leaf freeze resistance tests it was shown to have a similiar or even better hardiness than US119.

Citrus General Discussion / What is it- greening?
« on: February 28, 2017, 08:43:10 AM »
I like  a lot grapefruits from USA, they are much tastier than those coming from Israel or Italy, but today have seen very strange  fruits with a lot of uneven green coloration. Is it possible, that they are affected by greening?

Cold Hardy Citrus / How hardy is nasnaran?
« on: January 05, 2015, 04:04:11 AM »
I am looking for information on the hardiness of Nasnaran (Citrus amblycarpa, Djerook Leemo).
It is coming from tropical Indonesia, but strangely is listed among cold hardy varieties.
I read on another forum that its 2 year old seedlings has not been damaged at all after -10C (14F). What could be the hardiness of mature trees?

Thank you in advance,

Pages: [1]
SMF spam blocked by CleanTalk