Variation in Chromosome Constitution of the Xiaoyan Series Partial Amphiploids and Its Relationship to Stripe Rust and Stem Rust Resistance

The wild relatives of wheat(Triticum aestivum L.)contain tremendous amounts of potentially useful genes and represent a promising source of genetic diversity for wheat improvement(Bommineni and Jauhar,1997).Thinopyrum ponticum(Popd.)Barkworth and D.R.Dewey[syn.Agropyron elongatum