Only Nagami, and Fukushu, the rest do not.

It is Meiwa and Fukushu that grow true from seed. Kumquats grow so slowly that it will often die from anything that can ail it before it gets to a safe size of about 1 foot. At that hight it seems to hold up well for itself. As they get bigger and bigger kumquats have less problems and grow more vigorously.

Steve

that's good one the fruit side but needs some ristance

It depends what you mean by "true to seed".

Unlike many other common citrus varieties (like oranges), all the seeds in a kumquat will result from sexual recombination, and thus will generally not be genetically identical to its fruit parent. That being said, a kumquat grown from a kumquat seed will still be a kumquat, unless of course that kumquat fruit parent had been pollinated by a different citrus variety. In that case, you would get a hybrid.

okay but some disease and incect resistance is good

OPs Question was does Kumquats come TRUE from seed.

this I don't know