Diversity for Stem Rust (Puccinia graminis f. sp. tritici) Resistance in Durum Wheat (Triticum turgidum ssp. durum) Germplasm

Abstract

Three hundred durum wheat genotypes showing field resistance to stem rust since 2003 under heavy inoculum pressure could be classified in to seven diverse resistance groups based on their seedling and adult-plant responses to two important stem rust pathotypes viz., 40A (62G29), the most prevalent one, and 117-6 (37G19), the durum-specific one. Present information should be useful in providing guidelines for utilizing diverse resistance sources toward broadening of stem rust resistance base in durum improvement programmes.