This document outlines the principles and methods of plant breeding. It discusses the impact of parents, quality of parents, objectives of breeding, breeding methods, and pedigree. The main methods covered are for cross-pollinated crops, including mass selection, progeny selection, and recurrent selection, and for self-pollinated crops, like mass selection, pure line selection, bulk method, and back-cross method. It also defines a pure line as the progeny of a single homozygous plant of a self-pollinated species.