自Kruse大小麦远缘杂交研究获得成功以来,国内外一些学者按照其理论和方法,相继得到了大小麦属间杂种.目前存在的问题是获得的杂种全部或大部不孕,结实率非常低.这种杂交障碍是发生在受精前,受精过程中,还是受精后尚缺少研究. Since the success of Kruse wheat-distant hybridization research, some scholars at home and abroad have successively obtained large and small wheat interspecific hybrids according to their theories and methods. At present, the problem is that all or most of the hybrids obtained are infertile with low seed setting rate Whether this hybridization disorder occurs before fertilization, during fertilization, or after fertilization is lacking.