This is question for anyone who is or has ‘intentionally’ grown male for making seeds.
What are the criteria that you use to select the phenotype of a male with in a strain specific group of regular photo seeds.
The things I usually look for are shorter bushier males who go into flower the fastest, ‘assumption’ being if the male flowers quickly then so might the female.
I look for ones that were the healthiest of the group, resistant to pests or allergens.
Since they came for a group of same strain males and female, I compare the smell of the terpenes to see if they are a match.
One other thing, I don’t personally think that you can successfully sex a seed, the plant must be grown.