Grapefruit graft on ujukitsu seedling

[Yorgos]

I will be harvesting some Marsh grapefruit budwood later this winter.  I happen to have a seedling that has sprung up under my ujukitsu tree.  Since I am nor overwhelmingly fond of ujukitsu, I thought to graft the grapefruit onto the seedling and then let it take over at that spot.  Are these compatible, grafting wise, and for good fruit quality?
Thanks!

[Bomand]

Grapefruit is compatible with tons of stuff. I have never done the combination you speak of.....but I feel that it would work. The gfruit will be a vigorous grower and might overgrow your U. I graft gfruit to sweet orange and mandrin seedlings and have no problem. Some grapfruit on citrange is not a compatibility but not a failure by any means. Try it.

[Millet]

 I seriously doubt that there is any information what so ever concerning grafting Marsh grapefruit  on to  ujukitsu  sweet lemon.  Since ujukitsus a lemon cultivar I would guess that it would produce an inferior tasting Marsh.

[Laaz]

Ujukitsus is not a real lemon, it is a grapefruit x tangelo. Grapefruit should do well grafted to it. For cold hardiness I would use trifoliata or swingle.

[Millet]

Laaz thanks for clearing up the make up of the ujukitsu. 

[Yorgos]

Thanks all.