Abstract
An autotetraploid of soybeans as green manure wrasinduced by the colochicine method using one of thehorticltural varletles "Chasengoku".Difference ofcharacters between the diploid the induced tetraploid forms were compared and discussed from thecytological and morphological point of view.In cytologically, 40 chromosomes were observed in the diploid somatic cells, and 80 chromosomes in the tetraploid ones.Most somatic chromosomes were of rod shaped and have median or submedian constictions.One pair of chromosomes has a satellitd and another one pair has a secondary constriction at the end of a little longer arm.Disomatic cells containing twice the normal number of chromosomes were sometimes observed in the diploid form in the cells of pericycle opposite the xylem portion of central cylinder or stele.This phenemenon was scarecely observed in the tetraploid form(Figs.1a, 1b, 2).
