Chromosomal location of leaf rust and stem rust resistance introgressed from Triticum militinae Zhuk. into common wheat

Abstract

The leaf rust and stem rust resistance genes introgressed from Triticum militinae Zhuk. (2n = 4x = 28, genome, AAGG) into common wheat were assigned to the specific chromosomes through aneuploid analysis. Aneuploid analysis was done using two different and complete sets at monosomic series in the background of Lal 8ahadur and Chinese Spring. The rust resistant selection, Sel. T 2600, carrying the resistance introgressed from T. militinae Zhuk. was crossed with individual monosomic plants and monosomic plants were identified cytologically. The genetic analysis of F2 progenies derived from monosomic F1 plants tested with the most virulent leaf rust pathotype 77-5 and the stem rust pathotype 40-1 at seedling stage indicated that the crosses Lal 8ahadur 68 mono/Sel. T 2600 and Chinese Spring 18 mono/Sel. T 2600 as "critical line" for leaf rust resistance and the cross Chinese Spring 68 mono/Sel. T 2600 for stem rust resistance studies. The leaf rust and stem rust resistance of Sel. T 2600 were assigned to the chromosomes 68 and 18, respectively, introgressed as two different independent translocations and under dominant monogenic control.