The breeding method not used in self pollination crop is

The breeding method not used in self-pollination crops is Mass selection.
Self-pollination is a form of pollination in which pollen from the same plant arrives at the stigma of a flower (in flowering plants) or the ovule.
Breeding is the science-driven creative process of developing new plant varieties that goes by various names including cultivar development, crop improvement, and seed improvement.
In mass selection, seeds are collected from (usually a few dozen to a few hundred) desirable appearing individuals in a population, and the next generation is sown from the stock of mixed seeds.