The Tropical Fruit Forum

Yes, it was a pollen source. Young 20 cm seedling resisted -8C 6 hours artificial freezing without leaf damage.

Probably also abundant fruit set, lack of  bitter taste, early ripening.
And most important is the combination of all this in one variety.
It seems that all these features are polygenic and not dominant.
I have a hardy population of about a hundred seedlings from 5starXDunstan cross.
Only two of them have non bitter taste in their leaves.

For crossing purposes does it behave like a diploidor tetraploid?

Probably as a tetraploid, as the juice sacs are of the same layer as embryos.

With sufficient protection you can probably cultivate mango at your place.

Yes, these flowers have plenty of pollen , also some are fully developed with pistil that is rather unusual for the first flowering of FFPT. Out of 6 seedlings 4 has flowers and possibly one fruit has been formed.
In the past I failed to produce hybrids with this strain that are also  fast flowering.
Even FDXFFPT with  straight thorns that should be definitely  zygotic are not flowering early.

9 month old FF PT
Sidlings are ~10 cm high .

It is also very important to know if parent plants are parthenogenetic (giving fruits without pollination), self-compatible or belonging to the particular type of pollen compatibility.

Very confusing indeed. The rest of the world is using a Latin word silicium.
They probably mean the soluble compounds of silicon like amorphous SiO2 or silicates.

link

link

Photo is not clear, but if it looks like this:



it is a spider mite infestation

Probably, I got the immature budwood from Zitrusgaertner labeled as PTxSunki in 2012.
 First flower and one fruit in 2021



No protection and it has never been  damaged.

Maintaining overly strict variety identity can lead to them to become genetic artefacts.

I was not sure to understand this phrase especially in the context of loosing Cider Apple popularity.
But ChatGPT explained it to me:
This phrase suggests that if a particular variety of a plant or animal is maintained too strictly, without allowing for any genetic variation or diversity, it can become a genetic artifact. In other words, if the identity of the variety is too narrowly defined and preserved, it may lose important genetic traits that could make it more resilient or better adapted to changing environmental conditions.

Maintaining genetic diversity is crucial for the survival of any species, as it enables them to adapt to changes in their environment, resist diseases and pests, and cope with climate change. Without genetic diversity, a species may become vulnerable to environmental stressors, leading to population declines or even extinction.

Therefore, the phrase is suggesting that maintaining strict variety identity without allowing for genetic variation can be detrimental to the long-term survival of the species or variety.
 An excellent explanation indeed 

In the past we discussed on several occasions this idea to keep selection on F1 level  by crossing different F1 hybrids and selecting them initially  for  better freeze resistance with subsequent search for better than poncirus fruit quality.
In  a spring 2020 I pollinated several hundreds of 5star citrumelo flowers by Dunstan pollen.
It resulted in 53 fruits giving a little bit more than 1500 seeds. Germination rate was rather high and I eliminated most of nucellar 5star seedlings by tasting their leaves.
Eventually it produced ~1000 seedlings grown under lamps under high density to the size of ~15 cm high. In January next year they were exposed to our winter conditions with few night frosts and daytime temperatures around 5°C.
After that they were subjected to the gradual  artificial freezing that included  10 hours  at 0C , 2 hours at -3.5C and 3 hours at -8C. At this stage, neither  nucellar 5star nor Dunstan seedlings are able to survive.  Eighty eight hybrid survivors were planted in the open ground and for the moment I have around 80 plants, some of them reaching 150 cm height.
Most are trifoliates of different morphology, 2 are mostly monofoliates,

 six showing autumn leaf bronzing and partial leaf drop.

By tasting leaves I observed that for 4 plants  their leaves lack bitterness .

Matty, how do you explain the all albino seedlings I got from the variegated satsuma fruits. I got 100% albinos, that seems unusal to me. I have other variegated citrus seeds I planted and they hardly have only some albino seedlings.

As pagnr mentioned there were multiple sources of variegation in plants. The type observed in  your variegated satsuma was due to periclinal chimerism.
Basically the citrus leaves are derived from three layers of cells. One of them (L2) is mutant in this variety and does contain cells without chlorophyll.



https://chimeraav.com/wp-content/uploads/2020/04/HortScience-Chimeras-and-Variegation_-Patterns-of-Deceit.pdf

The cells from this layer also compose nucellus, the tissue that gives nucellar seeds most common in satsumas. That is why these  seedlings are white.
The FD partially albino seedling above is most probably due to fungal infection and finally will become completely white and will die. This is rather common in poncirus seedlings.