Here are three alien kush F2's grown from seed, next to each other in identical settings. This would be some anecdotal evidence to suggest genetics play a factor.
Left = male
Middle = female- drinks about 20% more than the other female- more branches, higher yields
Right = female - tight nodes, lower yielder than Middle female
fireXalien. don't laugh at #4. :)
This guy is 100% right!the reason you are having a heavy yield is because of the hollow branches o.k. here it goes the water and nutrients are carried up the stem from the medium the more hollow they are the more food and water gets to the tips of plants also outdoor plants seem to not be as hollow as indoor that could also be why indoor plants are more thc laden and also you will notice that the more air movement in a grow room the less hollow the stems and thats do to plant cellulose strengthening the stem so it can hold the weight of the buds it is producing
I grew different strained plants in a greenhouse, not subjected to winds. Some plants had holes in the center of the stem and some didn't. I found no real ryhme(sp?) or reason to it.
After reading everyones opinions, I found nothing substantial to sink my teeth into. Sometimes, it just happens.
I am thinking of using the stems with holes in it to make a couple of smoking pipes though.