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Messages - mikkel

Pages: [1] 2 3 ... 16
1
Cold Hardy Citrus / Re: Citrumelo Nr. 82
« on: January 22, 2022, 03:22:42 AM »
I have not been able to compare the 3 at the same time, but I would call N82 the best of the three and the european Dunstan the worst.

2
Cold Hardy Citrus / Re: Nippon Orangequat - cold hardiness
« on: January 15, 2022, 10:28:40 AM »

I am pretty sure Nippon Orangequat is not going to be able to survive zone 7 in Germany without protection.


this is just pure speculation

3
Cold Hardy Citrus / Re: Tricimequat
« on: January 12, 2022, 02:17:42 AM »
Interesting, the plant is monofoliate? Or is that a random picture from the internet lol

The picture comes from this website https://www.eisenhut.ch/dyn/index.php?id=272791&onlyid=140267 .

I'm always curious why sellers on eBay don't post photos of their fruiting plants that they are collecting seed from?





might be a hoax?
the picture from Eisenhut is a different plant

4
Cold Hardy Citrus / Re: Tricimequat
« on: January 10, 2022, 11:30:24 AM »
Do you have more information about it? a link maybe? or is it the seeds that are Tricimequat?

5
Cold Hardy Citrus / Re: Tricimequat
« on: January 10, 2022, 03:48:17 AM »
What is Tricimequat? Something with Procimequat and Poncirus in the parentage? Thank you!

6
Cold Hardy Citrus / Re: new thoughts on breeding hardier citrus
« on: January 09, 2022, 12:46:31 PM »
Quote
F1 hybrids are usually still quite uniform (if the parents are not already hybrids), F2 are then very broadly spread in their characteristics.
That's what I was pretty much getting at with using pure ones.
For me, the F2 is the interesting one, because that is where the really interesting things happen. In pure parental lines, the F1 generation consists of uniform types with mainly intermediate traits. But if you want to transfer a trait (e.g. cold tolerance) to another variety with good traits, it happens in the F2.
The F1 will be intermediate between the parents in fruit quality and cold tolerance, the bad of both worlds, so to speak.
In the F2 and the following generations the traits split and new trait combinations appear (e.g. ideally good fruit and cold tolerance) these have to be selected, therefore mass is needed. Since recessive and dominant as well as other genetic factors play a role, it varies from species to species which hybridisation is used in the following generations.
Of course, this is idealised theory and varies in reality. Especially when the parent varieties are not homozygous or / and already have hybrid traits.
Kumin's trial is, in the sense of this consideration, to interpret an F2 mass selection, the generation in which the splitting and recombination occurs for the first time.
For this reason I also try to work with F1 hybrids as crossing partners, this saves a lot of time.
Of course, this does not mean that hybridising pure species is not also useful. I also find mangshanensis very interesting.


Quote
Obtaining sweet fruits I think, is more about "less sour" genetics than "higher sugar level "genetics. It seems sourless is often recessive inherited and needs therefor backcrossing
That's useful!
[/quote]

there is a thread about it:

https://citrusgrowersv2.proboards.com/thread/728/inheritance-low-acidity

7
Cold Hardy Citrus / Re: new thoughts on breeding hardier citrus
« on: January 09, 2022, 07:58:29 AM »
Roughly speaking, the greater the number of seedlings, the greater the chance of finding one or a few that are more cold tolerant.
Hybrids do not have uniform characteristics, but a variance of traits (similiar to gaussian normal distribution). F1 hybrids are usually still quite uniform (if the parents are not already hybrids), F2 are then very broadly spread in their characteristics.
Obtaining sweet fruits I think, is more about "less sour" genetics than "higher sugar level "genetics. It seems sourless is often recessive inherited and needs therefor backcrossing.

8
Tropical Fruit Buy, Sell & Trade / Re: Cold hardy avocado seeds
« on: December 28, 2021, 04:33:58 PM »
Some time ago there were some for sale on ebay.

9
Citrus Buy, Sell, & Trade / Re: Fast flowering trifoliata
« on: December 28, 2021, 04:16:09 PM »
thanks!

10
Citrus Buy, Sell, & Trade / Re: Fast flowering trifoliata
« on: December 25, 2021, 04:11:33 PM »
.

11
Citrus Buy, Sell, & Trade / Re: Fast flowering trifoliata
« on: December 25, 2021, 04:02:00 PM »
Just checked my seedlings from last year. I though I pulled all the blooms off of them this spring. Guess I missed one...



Laaz do you still have this photo?

12
Cold Hardy Citrus / Re: Fukushu X PT seed
« on: December 01, 2021, 03:52:39 PM »

13
Cold Hardy Citrus / Re: F2 citrange winter hardiness trial
« on: November 19, 2021, 03:53:24 AM »
@kumin  It's good when a cure is so easy to reach ;D

14
Cold Hardy Citrus / Re: 28 F, -2.2 C
« on: November 19, 2021, 03:48:40 AM »
that's a tough decision, and one I keep asking myself. i guess a lot depends on the variety. my citrumelo in the yard has survived light radiation frost this year, I  am not sure about the exact temperature but definitely frost. another hybrid fruit showed no damage either. But that's no guarantee of anything.
The solution of orangedays seems the most pagmatic to me.
Fingers crossed and good luck!

15
Cold Hardy Citrus / Re: Hamlin x Flying Dragon
« on: November 18, 2021, 02:06:56 PM »
Andreas Voss once posted the seeds he received from the UCR on his website. If I remember correctly, there should be at least 12 different seedlings...

16
Cold Hardy Citrus / Re: Hamlin x Flying Dragon
« on: November 18, 2021, 01:58:18 PM »
yes I`ve got mine from Andreas Voss. How are yours? Any pictures?

17
Cold Hardy Citrus / Re: F2 citrange winter hardiness trial
« on: November 18, 2021, 01:56:38 PM »
because of the uniformity, i also suspected that they are most likely clones. very good to know.

18
Cold Hardy Citrus / Re: Hamlin x Flying Dragon
« on: November 17, 2021, 01:49:24 PM »
A.Voss received seeds from UCRiverside. There are probably several types around.

19
Cold Hardy Citrus / Re: new thoughts on breeding hardier citrus
« on: November 09, 2021, 11:18:15 AM »
I don't understand what you're trying to say?
I didn't mean anything by my last post.
Of course, it doesn't make sense to cross Ichang Papeda with something that is sensitive to cold. One of my goals is to cross with Ichang Papeda to transfer vigorousity to hybrids.
Hybrids of "F1 Poncirus hybrids" with Ichang Papeda grow much better than pure Poncirush hybrids for me. But that is just my observation and only refers to my climate. It may not be helpful elsewhere....

20
Cold Hardy Citrus / Re: new thoughts on breeding hardier citrus
« on: November 09, 2021, 10:24:02 AM »
Ichang Papeda is not as readily available in the US as in europe. And most of the time when it is offered it is a hybrid seedling so it has other ancestry other than ichang papeda.

I wouldn`t care. as long as these are vigorous plants and still quite cold hardy.

21
Cold Hardy Citrus / Re: new thoughts on breeding hardier citrus
« on: November 07, 2021, 02:58:43 AM »
I also thought about creating a hybrid swarm first, consisting of many different early bloomers.
As I understand it, early flowering in hybrids is often not heritable, probably it is a form of recessivity of one or more genes. So that the trait is quickly lost in the next generations.
Backcrossing could help, but that poses other practical problems, or perhaps a hybrid swarm of early-flowering varieties. Maybe different genes that produce early flowering can be combined with each other (provided it is not the same genes in all early flowering varieties) or, if it is the same genes, one can breed for better fruit quality within this swarm.
Later, an early bloomer with better fruit quality could be used for crossing with "normal" citrus.

22
Cold Hardy Citrus / Re: new thoughts on breeding hardier citrus
« on: November 07, 2021, 02:50:29 AM »
Have you ever thought of Ichang Papeda? Is it suitable for your climate zone?
Ichang Papeda grows much better than Poncirus and some flower after 3 years, but not all.
Poncirus grows so unspeakably slowly that I am already wondering whether it is at all suitable for my climate.


This autumn I also got a (mostly) seedless Ichang Papeda. When pollinated, it sometimes does make seeds.



23
Radoslav, is it available in Europe?

It is in the INRA collection in Corsica.
https://www.inrae.fr/sites/default/files/dt-r-34-catalogue_public_des_varietes_1.pdf

page 11

I just noticed: your questions is from 2018 :)

24
Cold Hardy Citrus / Re: F2 citrange winter hardiness trial
« on: October 26, 2021, 09:22:27 AM »
This is really good work! Thank you for sharing your experience with us!
 Are the plants in the first picture the ones that froze to the ground in the 1st winter and then sprouted again?
If those are already hardy to 10F, they are probably already hardy enough for many parts of Europe. The -11F survivors probably can't be topped for citrus hybrids at the moment. That's a big step forward!

25
Thanks for your answer. Is the tree still alive?

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