Hello there. I am wandering if Ribes rubrum (red currant) and Ribes nigrum (black current) can be hybridized. If so are there any varieties known?

I know that black currants and Gooseberry can be hybridized (to form so called Josta berries) but are thes Josta berries fertile and can they form viable seeds?

I recently planted some of these currants and I am wandering if it would be worth the effort trying to hybridize them next spring.

Regards,

Gertjan