Abstract:

This study investigated how different irrigation regimes affect yield and quality traits of new dryland wheat varieties with distinct genotypes, providing theoretical support for cultivar selection and cultivation practices. A randomized block design with three replications was adopted, incorporating two factors: variety (four genotypes) and irrigation regime (E₁ wintering water only; E₂ wintering + jointing water; E₃ wintering + jointing + flowering water). Significant genotype (G), irrigation (E), and genotype × irrigation interaction (GE) effects were detected across all yield and quality traits. The contribution rates varied as follows: G (1.34%-82.73%), E (3.73%-83.10%), and GE (0.79%-29.60%). The E₂ treatment (wintering + jointing water) showed the greatest improvements in both yield and quality among the tested irrigation regimes. For yield-oriented production, cultivar performance ranked: ‘Taikemai 32’> ‘Taikemai 30’> ‘Luohan 7’> ‘Lumai 21’. ‘Taikemai 30’ emerged as the optimal cultivar balancing high yield with superior quality. Where water resources permit, jointing-stage irrigation (E₂) is recommended to simultaneously boost both yield and grain quality.

Key words: wheat varieties, irrigation pattern, yield trait, protein trait, farinograph parameter, interaction effect