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do we have knowlegde about traits controled by more than one gene pair ?

Azra'eil

Member
hello,

i wondering if we know which traits are controled by more than one gene pair or if we know which traits are controled by one single gene pair in cannabis ?
thanks

az
 

GreenintheThumb

fuck the ticket, bought the ride
Veteran
Why do you ask?

There was an interesting thread about this subject back on OG, anyone got that sitting somewhere?
 

Azra'eil

Member
hi, green, well i ask for my future breeding plan of course, i read all the recent threads you have post in, great posts and great threads, like all other members posts like tom hill , h3ad mr greengenes....
i wasn't at og so i cant help but if a great breeder can help like sams it will be very cool.

az
 

ibjamming

Active member
Veteran
Has anyone mapped the genome of cannabis? Wouldn't in depth study be the only way to know? Is that kind of work being done?
 

Jones

Member
Has anyone mapped the genome of cannabis? Wouldn't in depth study be the only way to know? Is that kind of work being done?

Henryk Flachowsky at University of Wittenburg, Germany did a construction of a preliminary genetic linkage map (p.73) in hemp in 2003.
Basically a bunch of markers and their linkage.
No association of these markers with actual phenotypic expression other than sex whatsoever, though.
 
K

kopite

Most importantly THC...... characterized by the interaction of several genes with a plant's environment.
 

Azra'eil

Member
thanks jones and kopite, kopite i read a bit the thread you have open on vic high guide to create true breeding lines, he tells flavour is controled by several gene pairs, its interesting, i hope some experienced breeders will help a bit on this thread as i can't find concret informations on the net.
fellows just a wish, i count on you to keep this thread on the subject and to keep it readable as i see a lot of thread with a lot of pages painfull to read sometimes. thanks :)

Az
 

GreenintheThumb

fuck the ticket, bought the ride
Veteran
Wish someone had that OG thread. It was on the exact subject and quite a few heavy hitters came in and speculated on what they'd noticed. I think eXe, Chimera, and Sam all posted some stuff in it...arg, should have saved that one. Sorry I don't have more of a contribution Az.

Isn't autoflowering a simply inherited trait, many people notice the 1:3 ratio in the progeny.
 
K

kopite

Isn't autoflowering a simply inherited trait, many people notice the 1:3 ratio in the progeny.

I always thought it was a defect in the EMF that stops the florigen producing.......

@ jones - thanks for the info.. i think this is sim but in english, I was just going on what I have read in Clarkes book

http://jxb.oxfordjournals.org/cgi/content/full/60/13/3715

I guess that since i read it was not found in non fibre plants this gives a marker for using hollow stems ???

I think this just clarifys the relation between having a lower CBD to higher THC... but theres still many variants that effect THC (http://www.icmag.com/ic/showthread.php?t=49069) post 3 in that thread relates to this.

on a footnote was this study just done on Skunk ??

kopite
 

Jones

Member
SYTNIK, V. P.; STELMAH, A. F. (1999): The character of inheritance of differences in cannabinoid content in hemp (Cannabis sativa L.). Journal of the International Hemp Association 6, 8-9.

http://www.internationalhempassociation.org/jiha/jiha6106.html
...inheritance of cannabinoid production is controlled by closely linked, but independent genes for the biosynthesis of CBD and THC

Hey kopite, not arguing with you. I think we speak of the same thing.
In the German study 35 strains were involved. Skunk was among them.
I've also read about the claim that high fiber content means low cannabinoids but have also found that the jury is still out on that one since not all other researchers could verify this relation.
Also in that German study it's said that fiber content and oil content is polygenetic.

Edit: And if I had scrolled down a bit in that German study I'd have found that there's said that Sytnik's and Stelmah's 'observation' could not be verified (in that study or by any other author for that matter) ... oops.
 

GreenintheThumb

fuck the ticket, bought the ride
Veteran
I always thought it was a defect in the EMF that stops the florigen producing.......

@ jones - thanks for the info.. i think this is sim but in english, I was just going on what I have read in Clarkes book

http://jxb.oxfordjournals.org/cgi/content/full/60/13/3715

I guess that since i read it was not found in non fibre plants this gives a marker for using hollow stems ???

I think this just clarifys the relation between having a lower CBD to higher THC... but theres still many variants that effect THC (http://www.icmag.com/ic/showthread.php?t=49069) post 3 in that thread relates to this.

on a footnote was this study just done on Skunk ??

kopite

First and foremost: happy 420th post :D On the autoflowering thing: I don't have knowledge of the physical processes that cause the autoflowering, just have noticed the simple inheritance pattern that leads me to believe it's one gene pair and that the trait is recessive. We could both be right and it could be a simply inherited single gene that prevents the production of florigen. :2cents:

Jones- on the fiber versus cannabinoid content. Generally speaking hemp is a high fiber low cannabinoid plant but that doesn't mean it's always the case. I believe Sam mentioned that the skunk variety yields as much fiber per hactare as many hemp cultivars. But I'm a stoner and maybe it was seed/oil. I can't remember and I'm too lazy to go look.
 

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