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Why do farmers breed new varieties of wheat?

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A large red and yellow combine harvester cuts through a golden wheat field, leaving neat rows of harvested grain behind. — Cereal farming Combine harvesting wheat.

Farmers breed new varieties of wheat through cross-fertilization to combine desirable traits from different parent plants. This process is essential for several key objectives:12

Improving Quality and Yield: Breeders aim to develop strains that maintain high yields while simultaneously improving specific qualities, such as the baking characteristics of flour.1
Disease and Pest Resistance: New varieties are developed to withstand threats such as rust (a fungus) and other agricultural diseases.13
Structural Improvements: Scientists create stronger, shorter-stemmed ("dwarf") wheat to prevent "lodging," where heavy grain heads cause the plant to fall over. This allows for the use of more fertilizer and significantly increases crop yields.12
Environmental Adaptation: Breeding helps create varieties better suited to specific climates, such as drought resistance or types that mature early to avoid frost.13
Market Demands: Breeders must regularly update varieties to satisfy changing commercial and consumer requirements, as popular strains often lose their market relevance over time.3