从胚胎学方面研究了粘果山羊草细胞质的小麦雄性不育系K83(21)35A与保持系83(21)35B杂交的双受精过程,胚和胚乳的发育特点,以及单倍体胚和孪生胚发生的规律。结果表明:双受精过程、胚和胚乳的发育与普通小麦自交相似。n型单倍体胚来自助细胞的孤雌生殖;n-n型双胚来自助细胞和卵细胞的孤雌生殖;2n-n型双胚中的单倍体胚来自助细胞,二倍体胚来自受精卵。适当延迟授粉,能提高单倍体发生的频率。 From the aspects of embryology, we studied the double fertilization process, the developmental characteristics of embryos and endosperm in the cytoplasmic male sterile line K83 (21) 35A and the maintainer line 83 (21) 35B, and the characteristics of haploid embryos and twins The rules of embryogenesis. The results showed that the development of double fertilization, embryo and endosperm were similar to that of common wheat. n-type haploid embryos from parthenogenesis of helper cells; nn-type double embryos from parthenogenesis of helper cells and egg cells; haploid embryos from 2n-n type double embryos come from helper cells and diploid embryos from fertilization egg. Appropriate delay in pollination, haploid can improve the frequency of occurrence.