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用３７个小麦（Ｔｒｉｔｉｃｕｍａｅｓｔｉｖｕｍ）品种（系）为母本，分别与黑麦（Ｓｅｃａｌｅｃｅｒｅａｌｅ）、球茎大麦（Ｈｏｒｄｅｕｍｂｕｌｂｏｓｕｍ）、玉米（Ｚｅａｍａｙｓ）和鸭茅状摩擦禾（Ｔｒｉｐｓａｃｕｍｄａｃｔｙｌｏｉｄｅｓ）杂交，比较其亲和性，小麦和玉米或鸭茅状摩擦禾杂交比小麦与黑麦或球茎大麦杂交的亲和性显著提高。携带着显性Ｋｒ１和Ｋｒ２基因的小麦品种Ｈｏｐｅ与黑麦杂交，不能形成胚，而与玉米及鸭茅状摩擦禾杂交时，成胚率分别达１６．００％和３２．５０％。表明控制小麦与黑麦及球茎大麦杂交亲和性的Ｋｒ基因系统在小麦与玉米及小麦与鸭茅状摩擦禾属间杂交中失活。讨论了还存在有其它控制小麦属间杂交亲和性的遗传调控系统的可能性。
Thirty-seven Triticum aestivum varieties were crossed with Secalecereale, Hordeumbulbosum, Zeamays and Tripsacum dactyloides respectively to compare their affinity, The compatibility of cross between wheat and maize or Dactylon ruber than that of wheat and rye or bulblets was significantly increased. Hope, which carries the dominant Kr1 and Kr2 genes, crossed with rye and could not form embryos. The embryogenesis rates reached 16.00% and 32.50%, respectively, when crossed with maize and Dactylis moorhenoides. The Kr gene system, which shows control of the compatibility of crossbreeding of wheat with rye and bulblets, is inactivated by crosses between wheat and maize and between wheat and Dactylon rubrum. The possibility of other genetic control systems that control the compatibility of the interspecific hybrids is also discussed.