KARYOTYPIC POLYMORPHISM IN BEGONIA TUBEROHYBRIDA VOSS
1954 Volume 29 Issue 5-6 Pages 185-196
Details
1954 Volume 29 Issue 5-6 Pages 185-196
Twelve different chromosome numbers were found in eighteen plants of B. tuberohybrida examined (Table 1). Meiotic chromosome configurations were studied in seven plants, No. 5, 3, 9, 27, 22, 21 and D (Table 2). They were found to be striking polymorph with respect to the nuclear organization.
In a plant of B. tuberohybrida under investigation, a very peculiar type of abnormal meiosis was noted. It is characterized by the formation of multiple plates posterior to the first metaphase. And during the course of this division, a tendency of one genom to behave as an individual entity is shown.
In Begonia, chromosomes in pollen grain division were first demonstrated by the present study. Several different chromosome numbers were found. The results of chromosome counts were as follows; 28, 29, 30, 31, 35 and 10.
Expence of the present study was partly defrayed by a Grant in Aid for Fundamental Scientific Research of the Ministry of Education.
