BREEDING OBJECTIVES AND PROCEDURES

1. Major Breeding Objectives

Breeding programs focus on:
? High yield potential – Developing high-yielding varieties (HYVs).
? Adaptability & stability – Crops that perform well across environments.
? Abiotic stress tolerance – Resistance to drought, salinity, heat, and cold.
? Biotic stress tolerance – Resistance to pests, diseases, and weeds.
? Improved quality – Enhancing physical, chemical, and nutritional traits.

2. Breeding Procedures and Approaches

A. Conventional Breeding Approaches

1?? Selection Breeding – Choosing the best plants based on desirable traits.
2?? Hybridization – Crossing genetically different parents to combine traits.
3?? Mutation Breeding – Using radiation/chemicals to induce beneficial mutations.
4?? Backcross Breeding – Incorporating a specific trait into elite varieties.
5?? Recurrent Selection – Repeated cycles of selection for gradual improvement.

B. Modern Innovative Approaches

? Marker-Assisted Selection (MAS) – Using DNA markers to speed up breeding.
? Genetic Engineering (GM Crops) – Inserting specific genes for resistance.
? Genome Editing (CRISPR-Cas9) – Precise modifications for trait improvement.
? Speed Breeding – Growing multiple generations per year using controlled conditions.
? Hybrid Seed Production – Cytoplasmic Male Sterility (CMS) and self-incompatibility used in hybrid development.