Inheritance of resistance for Chinese wheat stripe rust races in a new common wheat variety Chuanmai 42 derived from synthetics between Triticum durum×Aegilops tauschii Identification of a High-Yield Introgression Locus from Synthetic Hexaploid Wheat in Chuanmai 42 Genetic Effects of 1BS Chromosome Arm on the Main Agrionomic Traits in Chuanmai 42 Detection of the Introgression Loci of Synthetic Hexaploid Wheat in Wheat Cultivar Chuanmai 42 by SSR Markers