The Tropical Fruit Forum

Have you already had fruit?

https://sci-hub.st/https://doi.org/10.2503/jjshs.65.685

click on "save" on the left side

further you can upload the pdf to an AI and request a translation. The quality is much better than all online translators

Yes, that was me who reported that before. I don't quite understand the rest of your comments... but I have some experience in crossing and breeding hybrids, and I can assure you that I can recognise whether a seedling is zygotic or only potentially zygotic. especially when it is as simple as with trifoliate and ichangensis parents...

Without being able to say it with absolute certainty, I noticed that Ichangensis seedlings initially do not have petioles on their first leaves. In contrast, hybrids resulting from a pollination with Ichangensis develop petioles very early on.

Quote from: mkono on January 23, 2025, 10:26:45 AM

Does anybody know if the variety commonly available in the states is a tetraploid?

Hong Kong kumquat is considered a separate species of kumquat because it is a tetraploid, rather than a diploid like normal kumquats or normal citrus.
It's the only natural citrus species I am aware of that is tetraploid

The Chinese literature indicates that there are different ploidy levels in wild hindsii populations. For example, it is explicitly emphasized that tetraploid variants have been found, which conversely means that not all wild plants are polyploid.
It is possible that only the Hong Kong kumquat accessions that have reached Europe and America are purely polyploid.
I would at least put a question mark behind the assertion that all wild hindsii populations are polyploid.

Variation of wild hindsii specimens:

http://journals.caass.org.cn/zwyczyxb/EN/10.13430/j.cnki.jpgr.20230717001

description of a tetraploid hindsii type from the natural habitat

https://www.ahs.ac.cn/EN/10.16420/j.issn.0513-353x.2021-0927

Vivergil is also selling FA5. Quite cheap. But these are rooted ones.

just a short note, my small citrus also suffered greatly from the slugs last year. I  then had very good success with nematodes to decimate the slugs. just 1 week later almost all the slugs had disappeared. I only found new slug offspring again in the fall. whether the effect lasts this year remains to be seen.

Hello Rei, thank you for your report and welcome to the forum. You've already gained a lot of experience, that's great! haven't you been active in any forums yet?

Concerning the Yuzu Citrumelo discussion:
In my opinion, Staruzu is the better choice than Yuzmelo from Zdenek (which you can get from e.g. Adavo, for example)
Yuzmelo Zdenek is quite hardy, Staruzu should be similar, but there is hardly any experience yet. Yuzmelo has already survived frost while in pot, not very deep frost but sufficient. The leaves also turn slightly reddish in winter temperatures, as if hinting at autumn coloration. However, the coloration disappears completely in spring. There is no real leaf litter as with Poncirus.
I've had one fruit on Yuzmelo (Zdenek) that wasn't fully ripe and tasted distinctly of Poncirus hybrids, not good in my eyes, perhaps they are different when they are fully ripe.

These were my notes, (but it wasn`t fully ripe):

Initially, immediately after cutting, the taste is typical of Poncirushybrids, a coniferous aroma can be clearly tasted, but no bitterness. The fruit is simply sour with secondary aromas.
After half a day it only tastes sour and like unripe grapefruit.
Definitely not a fruit for eating raw.

Staruzu was a fruit that I found quite similar to a lemon, with a pleasant lemon scent, but no secondary aromas, not even resin, just a slight bitterness that didn't bother me. My children simply called it a lemon.

Staruzu , top center

augusta is a seedling from around the turn of the millennium

I have seen the breeding program in Japan using larger trees, with individual limbs topworked with buds of individual hybrids, and then growing these as single stalks.

in South Korea:

Do you know anything specific about 43728?

When searching for Citrangor 43728 I came across the INIA in Uruguay, apparently a local counterpart to Riverside

Unfortunately there is no other source for Citrangor 43728. Does anyone know it?

And does anyone know INIA?


https://www.inia.org.uy/investigacion/programas/hortifruticultura/germo.htm#varios

of course, it is simply common dirt of an untidy writer...