小麦与近缘野生种杂交后，再与小麦回交，可以得到近缘野生种的异附加系。通常单体附加系的外源染色体向后代的传递不是很好。这是因为含有多余外源染色体的配子（特别是花粉），与只含有小麦染色体组的配子相比，在受精上处于相对不利的位置。但是，近年来研究者们发现，山羊 After crossing with the wild relatives of wheat and backcrossed with the wheat, the heterophilous line of the wild relatives can be obtained. Often the exogenous chromosomes of the cell line add to the offspring is not very good. This is because gametes containing extraneous foreign chromosomes, especially pollen, are in relatively unfavorable positions on fertilization compared to gametes containing only the wheat genome. However, in recent years, researchers have found that goats