A good mother and a good father...genetics "accept no substitute" I give them a lil' squeeze between my thumb and first finger....if they pop they are bad...if not plant'em ......I have always had a 95% germ rate ...now all my seeds from Holland....go in the dirt and see what happens..cuz they cost $$$$
Good seeds should be brownish with zebra like stripes. Bad or immature seeds will be green or white but, I rarely seen those germinate as well.