Studies on chromosome behaviour in intergeneric hybrids of some cruciferous plants.

摘要

Cytogenetical studies were made on chromosome behaviour in intergeneric hybrids of some cruciferous plants. In leaf cells of intergeneric hybrids (F1) of Brassica alboglabra X Orychophragmus violaceus, morphological differences were observed betweenchromosomes from B. alboglabra and those from O. violaceus. At prometaphase, 9 chromosomes from the genome of B. alboglabra were lightly stained, each with only a small portion darkly stained around the centromere. In intergeneric hybrids of Brassica campestris X Raphanus 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 chromosomes from the genome of R. sativus var. raphanistroides moved to the other.