Genetics are only part of the equation, in case anyone missed this post in the start of the thread I would say in my vast experience with faster strains the environment is 90% of the equation. You can also manipulate the light cycle during the last few weeks of bloom to be shorter and thus increase the rate of ripening with minimal loss of yield when compared to getting a whole extra harvest in per year. There are in fact many strains that are done in 6 to 7 weeks people are not just making this stuff up not all Cannabis strains have to flower for 8 to 12 weeks. Lowryder for instance starts flowering at around 2 or 3 weeks old and is completely done flowering and maturing at just around 8 weeks from seed with all cloudy trichomes. These very quick maturing traits can be found in other early purpose bred strains that are not autoflowering but you most likely will not complete them in the potentially fast advertised timeframe unless your grow conditions allow for such rapid growth. Not everyone is harvesting their plants early and smoking premature bud that says they have fast strains done in 49 days and to suggest that is just false information. There are many fast strains.
50 days you say? It's kinda like your parents saying "if you don't graduate b4 the age of 12 were gonna kill your ass and make another you"
It's done when it's done imho EVERY room is different and no strain is the same that's why we like the females.
Have A Great Day
Mr.Wags
Green Crack is always fun and fast..but clone only not seed ..lol peace out Headband707