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借助于 Ａвзис（四倍体－Ａврора高大山羊草）代换的形式可以获得一系列含有减数分裂时 ２１的Ａврора品系和某些高大山羊草特有的性状。对白粉病抗性不同的Ａврора品种的８个品系是由其杂交而成的。杂种的染色体配对和对白粉病抗性的研究证明了所有代换系有一个或至少有一个同源染色体。但是，某些品系之间什么样的高大山羊草染色体代换小麦的同源染色体是有差异的、为了识别这些品系中的两个同源组与中国春代换系杂交的 1Ｅ（１Ｄ）、２Ｅ（２Ｄ）、３Ｅ（３Ｄ）、４Ｓ１（４Ｄ）、５Ｕ（５Ｄ）、６Ｒ（６Ｄ）、７Ｅ（７Ｄ）杂种染色体配对，研究结果证明了一个高大山羊草染色体代换了ＡＢｐｏｐｅ小麦中的６Ｄ染色体；从这些染色体能够了解６Ｓ１或６Ｓｓｈ随体携带抗白粉病的显性基因，引起上层穗芒和茎秆表面花青素着色发育不全。
A series of traits peculiar to the Aврора line, including meiosis, and some tall goatgrass were obtained with the aid of the substitution of A взис (tetraploid-Aviagen). The eight lines of AstraZeneca that are resistant to powdery mildew are crossed. Hybrid chromosome hybridization and powdery mildew resistance studies have shown that all substitution lines have one or at least one homologous chromosome. However, what kind of tall goatgrass chromosome substitutions among some lines differ in homologous chromosomes, and in order to identify 1E (1D) of two homologous groups in these lines that cross with the Chinese spring substitution line, 2E (2D), 3E (3D), 4S1 (4D), 5U (5D), 6R (6D) and 7E (7D) hybrid chromosomes. The results demonstrate that a tall goat grass chromosome replaces the 6D Chromosomes. From these chromosomes, it can be understood that the 6S1 or 6Ssh satellites bear the dominant genes of powdery mildew and cause the discoloration of the anthocyanidins on the upper spikelets and stems.