摘要
Through embryo culture, intergeneric hybrids were produced between common wheat,Triticum aestivum cv. Chinese Spring （CS） （2n= 6x = 42, AABBDD） and crested wheatgrass,Agropyron desertorum （2n =4x =28, PPPP） for the first time. Their F<sub>2</sub> and BC<sub>1</sub> seeds havealso been successfully obtained by selfing and backcrossing with wheat in F<sub>1</sub> hybrids. Theseedlings of all F<sub>1</sub> hybrids tended to resemble their female parent, but they had more tillers,and their spike characteristics were between their parents. Average meiotic chromosomepairing at MI of F<sub>1</sub> hybrids was: 6.62Ⅰ+ 8.20RingⅡ+ 4.16RodⅡ+0.57Ⅲ+ 0.35Ⅳ+0.06Ⅴ+0.03Ⅵ. The successful experience of hybridization of common wheat with A. desertorum,the reason for the high level of chromosome pairing and self-fertility in the F<sub>1</sub> hybrids werediscussed. The F<sub>2</sub> and BC<sub>1</sub> seeds obtained in F<sub>1</sub> hybrids are of great importance to theory andpractice.
Through embryo culture, intergeneric hybrids were produced between common wheat,
Triticum aestivum cv. Chinese Spring (CS) (2n= 6x = 42, AABBDD) and crested wheatgrass,
Agropyron desertorum (2n =4x =28, PPPP) for the first time. Their F_2 and BC_1 seeds have
also been successfully obtained by selfing and backcrossing with wheat in F_1 hybrids. The
seedlings of all F_1 hybrids tended to resemble their female parent, but they had more tillers,
and their spike characteristics were between their parents. Average meiotic chromosome
pairing at MI of F_1 hybrids was: 6.62Ⅰ+ 8.20RingⅡ+ 4.16RodⅡ+0.57Ⅲ+ 0.35Ⅳ+0.06Ⅴ+
0.03Ⅵ. The successful experience of hybridization of common wheat with A. desertorum,
the reason for the high level of chromosome pairing and self-fertility in the F_1 hybrids were
discussed. The F_2 and BC_1 seeds obtained in F_1 hybrids are of great importance to theory and
practice.
