分析小黑麦“下山三号”(Triticale,2n=8x=56)与黑龙江燕麦(Avena sativa,2n=6x=42)的属间杂种F_1和F_2染色体构型,F_170.74％的花粉母细胞染色体数为预期的49,但亦有一些花粉母细胞的染色体数变化于<28～56之间。在花粉母细胞减数分裂的各个时期,出现染色体落后、染色体桥、环状染色体及众多的核物质分散于细胞质之中的特异行为。在杂种中还发现具有双核的花粉母细胞,共存的两个核还可各自进行分裂。 The interspecific F_1 and F_2 chromosome configurations of Triticale (2n = 8x = 56) and the hybrids of Avena sativa (2n = 6x = 42) were analyzed. F_170.74% pollen mother cells Chromosome number is expected 49, but there are also some pollen mother cell chromosome number changes between <28 ~ 56. During each stage of meiosis of pollen mother cells, there are some specific behaviors such as backward chromosomes, chromosome bridges, circular chromosomes and numerous nuclear matters dispersed in the cytoplasm. Pollen mother cells with dual nuclei are also found in the hybrids, and both coexisting nuclei can also each divide.