Genetics of rust resistance in tetraploid wheats. III. Genes for resistance to stem rust in certain Durum wheats

Abstract

The inheritance of resistance to stem rust in four durum wheats, namely P.I.168921, P.I.173401, Gaza, and C.I.7809 was studied. The variety P.I.168921 was found to possess two dominant genes Srt₁ and Srt₅, P.I.173401 two recessive genes srt₆ and srt₇, Gaza two dominant genes Srt₈ and Srt₉, and C.I.7809 genes Srt₃3 and Srt₁₀, for resistance to Australian strains of Puccinia graminis tritici Erikss. & Henn. It was observed that the genes srt₆, srt₇, Srt₉, and Srt₁₀ were independent of genes already identified.

Varieties Khapli, St.464, C.I.7778, and P.I.168921 had gene Srt₁Srt1 in common; and varieties St.464, C.I.7778, and C.I.7809 gene Srt₃ in common.