摘要： 对小麦（Triticum aestivunL）和羊草（Leymus chinensisT.）杂交的受精和胚胎发育进行了研究。羊草花粉在小麦柱头上萌发较好，花粉管能顺利穿过柱头，进入胚囊。在检查过的310个子房中，17个（5.5%）发生了双受精，产生了胚和胚乳；2个（0.65%）发生了单卵受精，只产生胚而无胚乳；7个（2.26%）发生了单极核受精，只产生胚乳而无胚。小麦×羊草虽然受精率为8.41%,但最后结实率很低，若利用胚培养技术对杂种胚进行早期离体培养，可望提高杂种植株的获得率

关键词: 小麦, 羊草, 远缘杂交, 胚胎发育

Abstract: Studies were made of the fertilization and embryo development in intergeneric crossing between Triticum aestivum L and Leymus chinensis. The pollen germination of Leymus chinensis appeared normal on the stigma of Triticum aestivum L and the pollen tube grew into the style and entered the embryo sacs.Double and single fertilization were observed in the pollinated florets of the 310 ovaries examined 17(5.5%)had double fertilization and had embryo and endosperm.Two(0.63%)had only embryo and 7(2.2%)had endosperm.However,the total percentage of fertilization was occupied 8.3%,and the seed was hardly obtained; yet it may be suggested that the potential of increasing the frequency of hybrid plant obtainment was great in the cross between wheat and Leymus chinensis T.,if embryo culture technique is employed at the early stage of hybrid embryo development.

Key words: Wheat, Leymus chinensis, Wide crosses, Ebryo development

中图分类号: 

• S512.035