In many plants (Sorghum, wheat, tomatoes, beans, peas, I could go on) dwarf means the internodes are closer together. This is passed on to seedlings. In peaches and apples, there are dwarfs due to dwarfing rootstock, and "genetic dwarfs" which are varieties with shorter internods. In some cases, in apples, for example, genetic dwarf branches have been found on named varieties and those can be multiplied by grafting on non-dwarfing roots.
So I'm suprized that, from what is said above, that such genetic dwarfs aren't known in citrus. Is that true?
Once again I'm showing that I know much about apples, little about citrus. Learning though.