From Exotic Genetics (2014)
An IX is an in cross. Similar to a BX or back cross except you are using the same like strain to outcross rather than looking for something in a different strain.
Many back crosses are done because theres no more seed stock left of the subject strain, and in order to bottleneck that line further you need an out crossing parent. In this case the outcrossing was done with a Starfighter F2 male. Since it technically is the same strain just andifferent filial generation... It is referred to as an in cross or IX because it is inbreed with itself rather than with a completely different strain.
Essentially the procedure was...
Starfighter F1 x Starfighter F1=Starfighter F2
Now since the F1 female was one of the finest ladies I've ever come across... Hats off to Alien of course... I wanted to get that into seed form. The next move was finding the amazing stud from the F2 generation like I believe i did. Perfect stout structure...resembled mom to a T... and believe it or not, was frosty all the way out to the fan leaves. Again this is a male we are talking about lol. Not only did I use him to improve so many other gals in my stable... but why not use him to bottleneck the traits of the original F1 since they were such like plants, just different sexes. Thus began the In crossing process. Next move was the first in cross....
Starfighter F1 x Starfighter F2= Starfighter IX (aka Exotic Fighter)
From this point I grew out the progeny and seen things moving toward mom genetically. So far so good. But there are always things to improve on and try to eliminate from the gene pool if possible. The next step was finding another male from the IX progeny that meet the like requirements of mom, and breed that yet again back to the original F1 female. Every breed , if properly selected, moving closer and closer to the best representation of the original Starfighter that I have seen and know of to date.
This last, but not final move in this ongoing process was taking another frosty male, which I did find, and taking it back to mom in hopes of continuing the process.
Starfighter F1 x Starfighter IX= Starfighter IX2
This is where I'm at with the project at the moment, and by lookin at what I've seen so far with Oscars pictures.. as well as my own.. I think it's safe to say that it's on the right track :)
Hope that helps explain it a bit without boring ya ;)
Good vibes ~~~