The original G13 s1

[Freedom_Fighter]

The problem when doing this is the loss of vigor.
That's why it's better to make 2 parallels lines with the same F1 as starting point and recombine them after F5. It minimize vigor lost.

cf @lozac123 chart that explains the méthod.
View attachment 95882

Thanks, Tom. Parallel line breeding is definitely the better method, for retaining F1 vigor. Totally.

I imagine, though, that the parallel line breeding model can be worked, with Shanti's backcrossing method as well, after the F2 selections are done.

Not being a breeder myself, I can only imagine there would be a couple other practical reasons for not using the back-crossing technique. Two backcrossed parallel lines, though, should still produce F1 hybrid vigor, when crossed at the right stage; but I could be mistaken. I'm open to learning.

If I try to think of a reason why I wouldn't back-cross, I imagine it would be that there are traits in the P1 stock that I want to eliminate, not reinforce.

 

[Virus Myth]

so Shanti had shared this chart with a member here, but it's a great way of viewing the world that go into IBLs. It is from the "Is Shark Shock an IBL?" thread.

View attachment 95458

That proves the hard work true breeders go through. Just imagine the sheer amount of labor involved, patience and dedication, plus
all the time and resources involved in growing all those generations to full maturity than harvesting plus waiting a few months of curing
before being able to smoke and assess the product so that selection can be made, taking all the notes you can in the process,
to only then proceed to the next cross. No wonder it takes years...

Also, the tree above shows that all descriptions used (eg: Shark Shock being described simply as WW x Skunk # 1) are just a general and
broad description of the chief parents involved in the whole breeding program. It doesnt mean that shark shock is simply WW banged together with SK1.

Each strain is the result of a multi-generational incest fiesta if you catch my drift...

 

[Apollo]

That proves the hard work true breeders go through. Just imagine the sheer amount of labor involved, patience and dedication, plus
all the time and resources involved in growing all those generations to full maturity than harvesting plus waiting a few months of curing
before being able to smoke and assess the product so that selection can be made, taking all the notes you can in the process,
to only then proceed to the next cross. No wonder it takes years...

Also, the tree above shows that all descriptions used (eg: Shark Shock being described simply as WW x Skunk # 1) are just a general and
broad description of the chief parents involved in the whole breeding program. It doesnt mean that shark shock is simply WW banged together with SK1.

Each strain is the result of a multi-generational incest fiesta if you catch my drift...

apparently you are right but it was a time that many of this strains where called f1 this means simply that two unrelated varieties where selected and banged together

 

[musashi]

Once upon a time there were landraces…

mu