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Messages - mikkel

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1
Cold Hardy Citrus / Re: F2 citrange winter hardiness trial
« on: September 19, 2023, 03:14:57 PM »
Hi Mikkel,
An interesting observation. How old was citrumelo rootstock?

Hi Ilya,

it is a probably 3 years old rootstock. I assume it is polyploid. It grows very fast, has leathery leaves and serrated leaf margins. I think it is a Swingle seedling, but i am not sure.
It is 1,50 m high and has already formed a crown on its own, which is probably very helpful. So it may be a simple coincidence, but I want to test it further.

2
Cold Hardy Citrus / Re: F2 citrange winter hardiness trial
« on: September 19, 2023, 08:33:28 AM »
Hello Ilya, I grafted a mature IchangStar 60 budwood into the crown of a 3 year old Citrumelo seedling, in spring the IchangStar 60 budwood started flowering and so did the Citrumelo shortly afterwards. This may be a coincidence, but I repeat this experiment, let`s see what happens next spring. I come to it because you write about the 100 5starXDunstan seedlings.... Could be a long time to wait for these to flower....

3
Cold Hardy Citrus / Re: F2 citrange winter hardiness trial
« on: September 12, 2023, 03:03:08 PM »
Walt, my "Holy Grail" would be a zygotic Conestoga series tree.
In my experience, pollination by Ichang Papeda often resulted in zygotic seeds. even in otherwise nucellar varieties. (But this is only anecdotal and not confirmed!).

4
Temperate Fruit Discussion / Re: Loquat blooming in summer
« on: September 11, 2023, 05:32:13 PM »
Is it a certain variety? Summer flowering is a rarity in loquats. Only in some varieties this is the case.

5
Temperate Fruit Discussion / Re: Hardy passion fruit / maypop
« on: September 11, 2023, 05:28:07 PM »
One green world in Portland has some really great maypop varieties. I got a bluePop from them last year, it flowered a bunch but didn't set fruit.
https://onegreenworld.com/product-category/vines/passiflora/

Judged by the flower, BluePop is probably a hybrid of incarnata and caerulea. These are often sterile and rarely form fruits, and when they do, they are often hollow.
In any case, you need a second variety for pollination to have a chance of fruit.

6
Cold Hardy Citrus / Re: Taichang lemon
« on: September 11, 2023, 03:54:12 PM »
Sylvain, has there ever been another fruit?

7
Cold Hardy Citrus / Re: Poncirus hybrid crosses
« on: August 27, 2023, 04:30:09 PM »
I understand the Australians have one as well, but it's noted to struggle. Not so much that it dies, but it's not exactly happy about it, either.

Microcitrus australasica x Poncirus hybrids also have been done in Florida by Ethan Nielsen. @ethane

The Microcitrus x Poncirus hybrids


8
Cold Hardy Citrus / Re: US-802 citrumelo
« on: August 10, 2023, 05:29:44 PM »
looking at these pictures I had the idea it might be a polyploid.
https://idtools.org/citrus_id/index.cfm?packageID=1179&entityID=8884
I have a polyploid citrumelo chance seedling that grows like crazy. Even in my climate.

Anyway, if 802 is from Siamese Sweet, it sounds interesting for breeding. But I rather suspect that it is a standard Siamese offspring (but that's just an idea I had when I read about it on the internet).

Probably hard to get? or can you order it from UCR?

9
Temperate Fruit Discussion / Re: Opuntia humifusa
« on: June 27, 2023, 06:00:53 PM »

Also this is a desire of mine: large, sweet and glochidless opuntia

maybe this one is interesting for breeding

'Willoughby Spit' Prickly Pear
https://store.experimentalfarmnetwork.org/products/willoughby-spit-prickly-pear?_pos=2&_sid=3ddb8c474&_ss=r

on EFN there was an O.stricta type with similar traites (now it has disappeared)

https://www.experimentalfarmnetwork.org/project/16

10
Cold Hardy Citrus / Re: Fast flowering trifoliate graft
« on: June 19, 2023, 11:20:22 AM »
Do they bloom as quickly in Paris as in the south?
I have never had a flowering plant. Neither as a seedling nor as a graft.

11
I have 3 varieties of these Eremo hybrids. None has flowered in the last few years. At least for me it is a dead end for breeding.

12
In my experience the proportion of zygotic seeds in partially nucellar varieties also depends  on the pollinizator.
Ichang Papeda as pollen donor often leads to zygotic offspring, at least in my experience.

13
Citrus General Discussion / Re: USDA says silicon helps citrus
« on: May 25, 2023, 03:08:14 PM »
I read the article, but I am not sure if silicone is in english the same as in german...
Is there a chemical/sientific name of it?
Silicone in german is something you use to groute the tile in bathrooms.

14
I tested Eremorange in an unheated greenhouse this winter and it was undamaged and started growing without any problems



How dry was the ground? Did you water them?

15
They have the one poncirus x orange that is an edible f1 hybrid.

Which one do you mean?

16
TaiTri is supposed to be nucellar, in my experience the seedlings are differently cold tolerant. I think this can be a sign of zygotic seedlings.
Yesterday I saw a picture of someone where every single seedling was clearly different from the others.
TaiTri could be zygotic at least sometimes.

17
Did all the seedlings survive or did some freeze to death?

18
are these IchangStar60, seedlings or grafted ones?

19
Cold Hardy Citrus / Re: Poncirus hybrid crosses
« on: May 05, 2023, 03:45:32 AM »
This one seems promising. It's cold hardy.

https://www.oscartintori.it/en/prodotto/otaheite-orange/

I have several limonia types, maybe even this type (names vary from nursery to nursery). So far all seem to be vulnerable to cold temperatures.

20
Temperate Fruit Discussion / Re: spring blooming loquats
« on: May 04, 2023, 12:51:39 PM »
Piera is another spring flowering loquat. It is a sport of Algerino.

21
Cold Hardy Citrus / Re: Poncirus hybrid crosses
« on: May 01, 2023, 01:54:22 AM »
Actually I just saw on the website in Europe they have a lot of meyer lemon crosses.
Hi 1rainman, do you have a link?

22
Cold Hardy Citrus / Re: F2 citrange winter hardiness trial
« on: April 29, 2023, 01:44:59 PM »
It might be an good idea to collect and breedalso with tetraploids. One day it might be helpful in creating triploid seedless hardy varieties.
I have some tetraploid Citrumelos and maybe sinensis x ichangensis. Who knows what it might be good for.

23
Citrus General Discussion / Re: Poncirus
« on: April 26, 2023, 10:52:56 PM »
It would be interesting to know if Poncirus polyandra has the same fruit characteristic as trifoliata.
If so, the resinous fruits might not be related to winter hardiness. because polyandra is much less winter hardy than trifoliata.
This would raise the hope that one could breed out these characteristics and still retain a hardy plant.

It's not the cleanest article (there are some noteworthy typos), but...
https://www.sciencedirect.com/science/article/pii/S0888754323000617

This suggests polyandra has cold-signaling genes and at least the potential for increased cold-hardiness relative to citrus. How much is unstated, and they never explicitly compare it to trifoliata.

Kunming is at about 6000 ft. I've seen it called zone 9b, but that seems contradictory given it snows there.

My P.polyandra nearly died at -6C. It is not very coldhardy. I would say there are some Citrus that are more coldhardy than polyandra.

24
Citrus General Discussion / Re: Poncirus
« on: April 26, 2023, 03:57:43 PM »
It would be interesting to know if Poncirus polyandra has the same fruit characteristic as trifoliata.
If so, the resinous fruits might not be related to winter hardiness. because polyandra is much less winter hardy than trifoliata.
This would raise the hope that one could breed out these characteristics and still retain a hardy plant.

25
Citrus General Discussion / Re: how true-to-seed is true-to-seed?
« on: April 26, 2023, 01:30:16 AM »
I have a lot of loquat seedlings too. Just for fun. How long will it take until maturity? I guess it takes a long time, right?

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