are orange trees grafted?

[keakar]

I know Satsuma trees are grafted by splicing a lemon tree to an orange tree but are orange trees grown straight from seed or are they spliced with something else like satsumas are?

I always wondered if I can just take the seeds from a store bought orange or tangerine and grow that same tree from it?

what about cutting a branch off of an existing orange tree and plant it to start a new tree? can that work too?

im asking because some kids broke off part of my orange tree and im afraid it may not fully recover so im thinking the section that was split off of the trunk has two branches about 24" long and i made a fresh cut on them and split the end to stimulate root growth and replanted them in a bucket with some fertilizer and potting soil and hoping they grow.

I want to be sure what grows (if it grows) will still be the same orange tree as the original or if I am just wasting my time.