Some Questions About True Breeding Afghan Heirlooms

YardG

In Bloom
I was left with more questions about Real Seed Co's Afghaan 90 and wanted to (ignorantly pontificate and) ask more questions without clogging Skunky Dunk's thread.

I was trying to figure out when RSC first started offering Afghaan 90, from what I found it seems like it was pretty recent as the results all seemed to be from within the last year or so. I was also looking at the description of the Afghaan 90 Dwarf seeds they offer and was left wondering a few things, namely how many true breeding Afghan seedlines have tall and short phenos, and how many generations of breeding it would take to reliably get short pheno offspring.

The latter first, does anyone know how many generations of breeding it would take, with two-pheno truebreeding seedlines, to get say, 75% short pheno offspring that are also truebreeding for shortness? I suppose it matters how many seeds you start off with, let's say 20 to keep the hypothetical semi-realistic, and you get 100% germination. Would it be possible to achieve something like that in one generation, by selecting only short pheno parents out of the available parental pool?

As for Afghan heirloom seedlines clearly Afghaan 90 has a tall pheno and short pheno, as does Petrolia Headstash. Does anyone know whether that's true of the other Afghan heirlooms that've made their way around over the years? Sounds like RSC's Deep Chunk is pretty uniform as to structure, anybody know about Tom Hill's? Not sure they were considered truebreeding but what about Maple Leaf Indica and Kush 4?
 

Skunky Dunk Farms

Cannabinoid Receptor
Good cache of questions lol!
I'm definatley not the one to answer any of them, ANY uf um!
But,,,,,, I'm 6 and a half decades old and have surely put bean to soil for 50 of them.
I honestly find it hard to believe that a bunch of stoner/collector/breeders for half a century kept track of everything.
I'm certain a sharpie faded or a sticky note fell off.
My personal experiance is from experiance. I smoked stinky rotten skunk. I grew seeds harvested from bags and they produced in kind. I was stupid and didn't realize it would be lost.
I've grown many, many, many crops of Sensi Seeds Skunk #1 and their Maple Leaf Indica enough times to know none of the "Skunk" is in there. Both of those lines have weakened over the years, in my humble opinion, but still are great breeders as they are very consistant amd heavy yeilders.
Broad leaf, narrow leaf are both indica traits depending on where they originated (Clarke Merlin) .
The Skunk #1 is more narrow leaning and the MLI is medium wide.
I've grown some "indica" freaks like from Nature Farms that the leaves are as wide as they are long.
In the seed run I'm doing right now and the future ones I'll be doing i just hope those stoners had some good fortune in their preservation attempt and that a treasure can be had through us and our efforts too.
I still have zips with "brick berdoo" and "merch colton" that have gray old beans in them lol.
But back to the really stinky arse skunk, it was around, everyone one had it for a summer, winter and another summer and then no more.
Sad.
But we'll see, stoner's are in charge!!
Hunt, hunt, hunt!
 

Willie

🍓Crush Genetics🍓
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The latter first, does anyone know how many generations of breeding it would take, with two-pheno truebreeding seedlines, to get say, 75% short pheno offspring that are also truebreeding for shortness? I suppose it matters how many seeds you start off with, let's say 20 to keep the hypothetical semi-realistic, and you get 100% germination. Would it be possible to achieve something like that in one generation, by selecting only short pheno parents out of the available parental pool?

...
I don't think it's possible to get to a true breeding line in one generation. I think you need to keep selecting for the trait you want each generation. Not sure how long or how many generations it would take to make them short, but my understanding is it starts showing results with F3, and getting more stable the higher you go. Good luck with it.
 

YardG

In Bloom
Just to be clear, I meant starting with an already inbred line (that has two morphological phenos, one tall and one short) and incrossing it again. In my hypothetical only short pheno parents are selected and incrossed again. Frankly I still agree with you, I would think it would take at least a second generation of selecting only short pheno parents (i.e. select only short pheno parents from an IBL and incross, select only short pheno parents from the next generation and incross those) to get reliably short offspring in future generations.

Admittedly this also opens up the question of whether an IBL with a tall and short pheno should be considered truebreeding.
 
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Willie

🍓Crush Genetics🍓
Thinking about Mendels Pea chart...............It would help if the short trait was dominant. Breeding the inbred lines...tall x short, gives you an F1. Pop them, pick the shorts, and breed those.............that would be the one generation., hmmmmmmm. You have some tough parameters, like 75% truebreeding and the one generation time frame. I think you can evolve to the 75% truebreeding but not in that time frame. Mendel's law shows from a tall x short cross 25% will be tall, 25% short and 50% hybrid which may show as tall or short depending on which is dominant. But either way, you only generate 25% that are truly short in one generation.
A year to a year and a half would be pretty fast to accomplish what you want..3-5 generations.
 
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