远缘杂交是创造新物种的重要途径之一。用小麦属(Triticum)先后分别与偃麦草属(Elytriga=冰草属Agropyron)和黑麦属(Secale)等杂交,以获得二属间杂种,一般需要分两步进行,即首先合成二属间杂种,然后再用第三个属与二属间杂种F_1进行杂交。但是用这种方法获得的三属间杂种照例是不育的。我们认为,合成以小麦特性为主,兼有偃麦 Distant hybridization is one of the important ways to create new species. Interbreeding with Triticum (Elytriga = Agropyron) and Secale (Secale), respectively, to obtain intergeneric hybrids usually takes two steps: first, The hybrids were then crossed with the second genera, F_2, in the second genera. However, the interspecific hybrids obtained in this way are, as a rule, sterile. We believe that the synthesis of wheat-based features, both with red stroma