Beta, that's actually a REALLY gross misstatement.
No one fully understand the complexity of the Phylos clusters because they are formed based on limited data and the gaps filled in by algorithm. It's a limitation of their procedures.
This algorithm does not allow for fine enough distinction - ANYONE - who has had TK, SFV, JoshD/Ghost, etc, etc - KNOWS they are NOT the exact same plant.
What the galaxy HAS shown us - is that OG Kush, IS a direct relative of Chem '91 and Rob Clarke Ghani.
The only part of that related to this thread - is that the Chem story checks out. '91 IS related to Chem D, Chem 4. Chem Sis, is not in the galaxy.
It is also important to note - if I turn in an OG Kush plant labled as blueberry, then there will be a blueberry entry at the OG303 cluster. There are ways to create error. The only entries in the galaxy you can trust are from individuals who are KNOWN for over a decade to hold these special / rare / elite cuttings.
dank.Frank
There are several posts discussing this topic between myself and ChunkyPigs.
I was not quite as aware of the nuances of the galaxy until he shared some insight.
If you look at the wording there - sums, probability, metric, set threshold(s) - and really consider what they are saying...
As it was explained to me:
They are taking a very small percentage of the plants DNA that contains a key set of data points, however, it is NOT a complete enough picture to REALLY give full ancestral data. This lack of data is accounted for by their genetic algorithm, which they have used to "set thresholds for likely immediate family relationships".
Meaning, while plants are now finding themselves in clusters, such as the OG cluster with 51 plants currently, all that tells us, is according to their algorithm, these plants are genetically similar. NOT the same plant per say and not even necessarily mislabeled.
Notice they won't go as far as to tell someone the plant is not what they say it is. "Many varieties within the Galaxy have the same name, yet are genetically distinct. Familial relationships MAY help determine if a variety has been mislabeled."
This is because they know the algorithm they are using has a "slightly higher than average technical error rate of genotyping", not because they have set a threshold, but because they are not taking enough data to begin with.
THIS is because scanning 1-2% is cheaper, and can be marketed as affordable for consumers. A much more comprehensive, yet accurate test, would not be available to many because of cost.
Doesn't mean they don't have the data, it just isn't being published open source.
From our perspective then, the only entries on the galaxy that hold any merit, are those entered by reputable people. Fortunately, Chem 91 and TK have both been entered by none other than Nspecta. JoshD OG is in the OG303 cluster as well, entered by JoshD himself.
That tells us, these are good base lines to work from. ANYONE who has smoked TK, Ghost, SFV, and others in the 303 cluster - KNOW they are not the same plant. They just aren't.
They are being shown as a "single plant" in the galaxy, simply because of the limitations of their algorithms and where they set their thresholds.
It is 1000% fact, with more data, there would be more segregation within the Phylos Galaxy clusters. The information is still very useful, but you can not treat it as if it is infallible, unfortunately.
The worst part is, it still doesn't tell us a true map, as in TK begot Ghost. Ghost begot SFV. SFV begot Fire. (or whatever, just for example) Like we all want it too.
dank.Frank
An interesting update on this thread, if nobody has seen it yet. Phylos Bioscience recently did genetic sequencing on Nspecta / CSI Humboldt's cuts of TK and Chem91.
Chem 91: https://testing.phylosbioscience.com/sample/genotype/p8r77xlo
TK: https://testing.phylosbioscience.com/sample/genotype/1oeyydn8
Two interesting points - One, it looks like Chem91 is either the immediate pollen or pistil donor to TK. According to this testing as I understand it, Chem91 is the direct parent of TK.
Two, look at all the samples Phylos has received that are genetically identical to TK!
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Anybody holding the real 91?
i got the real 95...