How do they know the % of sativa/indica?

[ziv2002]

I can understand that if you take some strain
thats pure indica,and mix it with a pure sativa
strain-they will be 50/50. but i never understood:
lets take NYCD:
Genetics:: Mexican sativa and afganii
40% indica/60% sativa

how do they get to 40/60??

thanks...

 

[Muffy]

I can understand that if you take some strain
thats pure indica,and mix it with a pure sativa
strain-they will be 50/50. but i never understood:
lets take NYCD:
Genetics:: Mexican sativa and afganii
40% indica/60% sativa

how do they get to 40/60??

thanks...

They are compensating for the dominance of traits so 40 out of 100 phenos will be mostly indica and 60% will be sativa.

 

[Gastanker]

It is all just a guesstimate. You could cross a pure sativa with a pure indica and end up with a plant that exhibited 95% of the sativa traits and only 5% of the indica. None of the breeders really know what exact percent of the retained genes are from which source without just smelling, tasting, smoking, and guessing based on this.

If you wanted you could try and base the numbers on just simple %'s that doesn't mean much. start with a pure indica and a pure sativa and result is a 50/50. Cross that with a pure indica and you'll have a 75/25. Cross that with the 50/50 and you'll have a 5:3 ratio which is a 62.5/37.5.... These numbers wouldn't mean much in my opinion.

 

[5ourdiesel]

ya seed companies just guess by the phenotypes. some completely fuck up...barneys farm pineapple chunk is labeled indica but is truly a sativa. only way to do it right would be to find the genotype through dna sequencing which is $$$$$