I did something similar with some Allegria seeds I got a year ago. After they indicated I kept 2 of the males off in another room and once they got to the point where they were releasing their pollen on their own I would "milk" them daily by holding a piece of slick paper under the pods and tapping the branch to get the pollen to fall on it.
Then by folding the paper I could funnel the collected pollen into a 35mm plastic film canister. After about 2 to 3 weeks of this I had the canister about 10% full. And that's a lot of pollen.
I used the brush technique described to pollinate the bottom two buds on each female plant and ended up with a good 2 oz. of seeds to use for future grows while still having at least 75% of the buds from that grow remain seedless.
I've stored the remaining pollen in that canister in the freezer and have used it on two subsequent grows to pollinate one small bud at the bottom of each new female grown.
It's been almost a year since I collected it and stored it in the freezer and that pollen is still viable.
My reasons for continuing to pollinate one small lower bud on each new female grown has been two fold. One, to continue to get some fresh seeds and two, in hopes that by letting each plant reproduce to a limited extent they wouldn't be tempted to form any hermaphrodites or produce "banannas" at the end of the flowering cycle.
While I haven't had any hermaphrodites form since begining to do this it may have more to do with this strains (Allegria) not being prone to that than it does with my "theory".
It did not eliminate the formation of banannas during the final stages of flowering. All though I don't seem to get as many of those as I have in past harvests. Any way, by the time the banannas start showing up they seem to be ready to harvest according to the clouding up and beginning to amber of some of the trichromes.
