Cytological Studies of Sugar Cane. I

Observations on some POJ varieties

抄録

1. The number of bivalents and univalents at the I. metaphase of PMC in 2725 POJ, 2722 POJ, 2878 POJ, 2883 POJ and 2364 POJ has been examined (Table 2).
2. Both 2725 POJ and 2722 POJ have one fragment each. These two fragments have perhaps the same origin, as the two varieties have been derived from the same cross (2364 POJ×EK 28).
3. In some preparations of 2878 POJ, it has been observed that 2-5 bivalents are closely arranged, showing so-called secondary associations.
4. S. spootaneum L. alas Karenko, which has been collected at Karenko, East Formosa, shows 48_II at the I. metaphase of PMC.