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Messages - Xenon

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Nope, I used community pots for the seeds and would get albinos mixed in with green seedlings of Starburst pummelo. Seedlings received outdoor light as soon as they broke the soil line.

No albinos found in Valenica orange, Autumn Honey tangerine, Marsh grapefruit, etc under the same care and conditions.

Unless you're referring to the less than perfect conditions of the seedling photo I posted. That would just be the wear and tear of partial neglect and the hottest Texas summer of all time.

My best guess is that the extremely low rate of self-pollination produces a relative abundance of albino seedlings while any kind of foreign pollen confers a dominant chlorophyll restoring allele (no albinos).

Here is a paper about inheritance of genetic albinsim in zygotic seedlings involving grapefruit:
"Inheritance of albinism in #grapefruit (Citrus paradisi Macf.; al2+al2−) and‘Hanayu’ (C. hanaju hort. ex Shirai; al1+al1−)"

"It seems that the genetic albinism of a given Citrus genotypes is a stable trait governed by one or more recessive nuclear genes.
The albinism is not affected by environmental conditions and seedling age after seed germination, but recovered by greenrestorers. Some Citrus accessions with relation to grapefruit and Hanayu carry these genes. These accessions will be very useful materials for producing markers in experiments such as micrografting, breeding and chloroplast research in Citrus."

This is my best seedling out of several dozen seeds. Notice the "pure" pummelo phenotype with rounded leaf tips, large petiole wing, and glossy leaf. A few others look a bit doubtful with pointed tips and less glossy leaves, somewhat grapefruit-like. Others looked obviously outcrossed, lacked vigor, or were albino/partially albino. Time will tell if your seedlings are pure pummelos. I'd be wary of the occasional fruit with many seeds, it's probably outcrossed.

These are isolated seeds from self-incompatible pummelos. In theory, the pummelos should be seedless just like "seedless" clementine or Afourer.

In practice, every other pummelo might only have 1 seed. I've even gone through 5 or so Starburst pummelos in a row without finding a seed. Takes eating several dozen fruits just to get a dozen seeds. Definitely NOT the usual seedy cross pollinated pummelo.

The albinism is genetic, probably related to self-incompatibility in pummelo. The few viable seeds are probably the result of something very low chance happening (or outcrossing) during fertilization and/or development that restores viability. None of my other citrus seeds exhibit such high rates of albinism (or ever, really), I've sprouted dozens of other citrus seeds and none of them ever turn up albino except for the Starburst pummelo.

This pummelo is not patented unlike their tangerines. The most info I was able to find is that it's of Thai origin.

Yes it's delicious with good acid-sweet balance and ridiculously thin skin (for a pummelo). Way better than the mostly trash pummelos from California, Oroblanco, and even the imported Vietnamese pummelos. I have some seedlings from 2022 and am growing out some more from this year, hopefully something good turns up. Yes I'm aware pummelo seed is zygotic, but it's really easy to spot pummelo seedlings from non-pummelo. Also, about half or more of the seedlings are albino and a good percentage look obviously non-pummelo.

I think I have stumbled on a game changer, though. Okra is rediculously easy to graft. Below is a picture of an okra grafted to cranberry hibiscus (H. acetosella). Easiest thing I ever grafted and healed in only 3 days. I wish I would have grafted it at the beginning of summer instead of the end.

How is the growth of okra after a few weeks/long-term? Any delayed incompatibility? Thanks

Tropical Fruit Discussion / Re: Cacao Growers, zone pushing and varietals
« on: November 06, 2023, 12:46:34 PM »
Lychee is a million times more cold hardy than cacao. Fairchild near Miami has a mature cacao in zone 11a and even it gets cold damage once or twice a decade when the low is near 40F. The handful of nights below 55F are enough to cause flower drop and fruit abortion in the "winter".

Zone 10 in Florida is also a million (x1000) times more tropical than Bay Area zone 10, it's not "just drier"...the difference is night and day in temperature and overall weather pattern. Equating Florida zones with California zones is 100% wrong and will just cause you heartbreak. Bay Area obviously has nothing to do with warm beaches lined with coconuts. No parallel whatsoever!

Still looking for a 1-2 years old plant. Thanks!

Anyone in Houston have Grimal jaboticaba for sale?


Sent you a message

Tropical Fruit Discussion / Re: Fruits of Canary Islands
« on: February 05, 2019, 02:08:57 AM »
Close to sea level you can grow anything except of ultra tropicals: no durian, mangosteen, rambutan, pulasan, Mangifera caesia, chempedak, etc. All other ssp. you mentioned do fine.

Here is a nice breadfruit tree on the SW coast of Tenerife:]. All of those ultra tropicals are probably worth a shot too, especially on the SW coast.

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