Genghis Kush
Active member
great link
it goes on to say "... so Cannabis and Humulus are likely to have diverged at some point between 34 and 6.38 MYA."
and then this,
"It has been suggested that humans were responsible for the divergence of C. sativa and C. indica. The hypothesis is that the progenitor of cannabis inhabited the steppes of Central Asia within the last 50,000 years, alongside populations of Upper Paleolithic hunter-gatherers that may have already begun to utilise the plant.
As the climate cooled leading up to the last glacial maximum (LGM; 26,000-19,000 BP), these groups began to migrate southward to warmer regions, possibly taking these early proto-cannabis seeds with them and thereby saving them from extinction as the cold weather advanced.
These migrating populations diverged and settled in two key refuges: the temperate foothills of southern and south-eastern Europe, where the putative hemp ancestor and progenitor of modern C. sativa was to develop, and the temperate mountain valleys of southern Asia, where the putative drug ancestor and progenitor of modern C. indica arose.
There is also speculation that C. ruderalis survived the LGM in more northerly refuges. Certainly, there is little dispute that outside of geographically-limited ‘refugia’, no cannabis species would have survived the LGM, and that speciation occurred during such a period.
However, it is considered more likely by some that C. sativa and C. indica diverged during a glacial period prior to the LGM, and had already become fully speciated by the time early humans encountered it."
Looking forward to hearing the results of Sams work Cannabis DNA.
it goes on to say "... so Cannabis and Humulus are likely to have diverged at some point between 34 and 6.38 MYA."
and then this,
"It has been suggested that humans were responsible for the divergence of C. sativa and C. indica. The hypothesis is that the progenitor of cannabis inhabited the steppes of Central Asia within the last 50,000 years, alongside populations of Upper Paleolithic hunter-gatherers that may have already begun to utilise the plant.
As the climate cooled leading up to the last glacial maximum (LGM; 26,000-19,000 BP), these groups began to migrate southward to warmer regions, possibly taking these early proto-cannabis seeds with them and thereby saving them from extinction as the cold weather advanced.
These migrating populations diverged and settled in two key refuges: the temperate foothills of southern and south-eastern Europe, where the putative hemp ancestor and progenitor of modern C. sativa was to develop, and the temperate mountain valleys of southern Asia, where the putative drug ancestor and progenitor of modern C. indica arose.
There is also speculation that C. ruderalis survived the LGM in more northerly refuges. Certainly, there is little dispute that outside of geographically-limited ‘refugia’, no cannabis species would have survived the LGM, and that speciation occurred during such a period.
However, it is considered more likely by some that C. sativa and C. indica diverged during a glacial period prior to the LGM, and had already become fully speciated by the time early humans encountered it."
Looking forward to hearing the results of Sams work Cannabis DNA.