Читать книгу Principles of Plant Genetics and Breeding - George Acquaah - Страница 24

Breeders need to produce plant cultivars for different production systems to facilitate crop production and optimize crop productivity. For example, crop cultivars must be developed for rain‐fed or irrigated production, and for mechanized or non‐mechanized production. In the case of rice, separate sets of cultivars are needed for upland production and for paddy production. In organic production systems where pesticide use is highly restricted, producers need insect‐ and disease‐resistant cultivars in crop production.