Breeding of Vegetable, Spice and Tuber crops (2+1)

Recurrent selection and Principles

Recurrent selection

• A method of breeding designed to concentrate favourable genes scattered among a number of individuals by selecting in each generation among progeny produced by matings inter se of the selected individuals or their self progeny of the previous generation.

Principles

• The probability of isolating an outstanding inbred line depends primarily on two factors;
• The proportion of superior genotypes present in the base population from which inbreds are isolated, and
• The effectiveness of selection during the inbreeding process in increasing the frequency of desirable genes or gene combinations.
• Recurrent selection is effective in increasing the frequency of desirable genes in the selected population. It is most suited for characters with high heritability. Based on the ways in which plants with desirable characters are identified, recurrent selection has been classified into four types