Breeding of an artificial interspecific hybrid (2n=18) between Tradescantia paludosa (2n=12) and T. reflexa , ( 2n=24) or T. virginiana ( 2n=24), and the meiosis of the F 1

Abstract

An artificial interspecific hybrid (3x) between Tradescantia paludosa (2x) and T. reflexa ( 4x) or T. virginiana (4x) was newly produced as one of the living materials in order to observe the meiosis under the concepts of the homologous chromosome and the genome. It was clarified that the artificial cross was easily successed by the custration method in the early morning. The meiotic configuration of the F1 showed six trivalents in PMCs. The produced hybrids (F1) was perennial and showed to be easy in the cultivation of them. Hence we may have no waste of the times and labors for the preser vation of the F1 strains. Owing to the above facts, it was considered that this triploid F1 hybrid was one of the useful living materials on purpose of a more advanced observation of the meiosis.