So this is in the category of things you were oblivious too at the time. In May 1990 The Breeders released their first album, Pod. In August 1992 Melody Makers Kurt Cobain listed Pod as on of the most influential albums of his life.
Take a listen to Iris then listen to anything from Nirvana and tell me you don’t hear the influence. No Nirvana doesn’t owe their style to The Breeders but they influenced each other. But really you have to go back to The Pixies before you get a band influencing Nirvana.