Principles of Plant Breeding (2+1)

Backcross Breeding

Introduction
• A Crossing between a F1hybrid orits segregating generation with one of its parents is known as Back cross. The hybrid and its progenies in the subsequent generations are repeatedly back crossed to one of their parent. As a result the genotype of back cross progeny becomes increasingly similar to that parent to whom the back crosses are made. At the end of 6-8 back crosses, the progeny would be almost identical with the parent involved in back crossing.

Objective:
1. To improve one or two specific defects of a high yielding variety and a well adapted variety with desirable character.
2. The characters lacking in this variety are transferred to it from a donor parent without changing the genotype of this variety except for the genes being transformed.