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Topics - Ilya11

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1
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.

2
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.

3
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.

4
Cold Hardy Citrus / moving and blocking
« on: May 01, 2018, 10:33:55 AM »
Millet,
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?

5
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:



http://journal.ashspublications.org/content/141/1/54.abstract   

6
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.

http://hortsci.ashspublications.org/content/33/4/744.full.pdf

7
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?


8
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,

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