【摘要】 作者对芸苔族植物两个属间杂种的染色体行为作了观察 ,在芥蓝和诸葛菜属间杂种一代植株根尖细胞 ,观察到芥蓝染色体和诸葛菜染色体之间的形态差别及染色体行为不同步 .在有丝分裂前期 ,有 12个染色体的个体性较先显示出来 ,而另外 9个染色体的个体性较后显示出来 .在有丝分裂中期 ,芥蓝染色体组的 9个染色体染色较浅 ,仅着丝粒附近一小部分染色较深 ;而诸葛菜染色体组的 12个染色体一般染色较深 .在白菜型油菜和蓝花子属间杂种的花粉母细胞减数分裂中 ,对许多细胞的中期Ⅰ观察到 19个单价体 .在有的细胞的后期Ⅰ ,观察到染色体组分开 ,即白菜型油菜的 10个单价体移向细胞一极 ,蓝花子的 9个单价体移向另一极 .更多还原

【Abstract】 Cytogenetical studies were made on chromosome behavior in intergeneric hybrids of some plants of brassicaceae. In leaf cells of intergeneric hybrids (F 1) of Brassica alboglabra×Orychophagmus violaceus, asynchronous behavior and morphological difference were observed between chromosomes from B. alboglalbra and those from O. violaceus. During mitosis the 12 chromosomes of the genome of O. violaceus became visible at first, and then the 9 chromosomes of the genome of B. alboglabra were observed. At prometaphase 9 chromosomes from the genome of B. alboglabra were lightly stained, each with only a small portion darkly stained near the centromere. In intergeneric hybrids of B. campestris×R. sativus var. raphanistroides, meiotic studies showed that in some cells 19 univalent chromosomes were observed at metaphase Ⅰ, and in a few cells the genome separation was observed at early anaphase Ⅰ, where 10 univalent chromosomes from the genome of B. campestris moved to one pole, and 9 univalent ones from the genome of R. sativus var. raphanistroides moved to the other.更多还原