Genetic Dissection of Frost Tolerance in Winter Durum Wheat: Three Validated KASP Markers for Marker-Assisted Selection.

ABSTRACT: Winter durum wheat combines the benefits of autumn sowing with high grain quality but remains poorly adapted to temperate regions due to low frost tolerance. To elucidate the genetic basis of winter hardiness and support breeding for improved cold adaptation, a segregating multi-family F₂ panel (n = 270) was developed from crosses among frost-tolerant and frost-susceptible lines. GWAS identified four loci significantly associated with winter survival on chromosomes 1B, 5A, 5B, and 7B, collectively explaining 7.6-21.5% of phenotypic variance. These loci jointly improved model performance (ΔMcFadden R² = 0.230, p-value = 4.76 × 10^-17) without evidence of epistasis, indicating additive inheritance. Predicted survival increased nearly linearly with the n

SUBMITTER: Divashuk M 

PROVIDER: S-EPMC12787326 | biostudies-literature | 2025 Dec

REPOSITORIES: biostudies-literature