So it's a female autoflower Gelato reversed onto a female Runtz clone-only. Those progeny would be 25% autoflowering females.Sure
First of all (and that's probably what is more confusing) our use of the designation 3G, 4G, 5G… (in Autoflowering) identifies the generational steps and not the generations themselves. We established a new generational step every time the presence of Cannabis Ruderalis genetic in the autoflowering strains is reduced. This reduction usually takes place due to the cross with photoperiod-dependent genetics.
And Sweet Seeds® has been doing this since 2011. You are right when you say that you "only started hearing about Runtz in the last year or so", but if you go to the strain description for Runtz XL Auto® (first post of this thread) you can see that the autoflowering strain that was used as parental to give this strain its autoflowering genetic trait was not Runtz but Sweet Gelato Auto®. The Runtz parental used is a photoperiod-dependent strain.
And so, as the Sweet Gelato Auto® is itself (in regards to our counts of generational steps) a 5th Generation autoflowering strain, by crossing it one more time, with a photoperiod-dependent strain, the % of Ruderalis drops to half of what it was before in the original Sweet Gelato Auto®, hence originating (according to our procedures of counting the generations) a 6th Generation autoflowering strain that we named as Runtz XL Auto®.
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I may be wrong, but it's my understanding that the progeny of that cross would need at least one or two more generations in order to fix the autoflowering attribute into 100% of the population.
That's what has me confused...