かやつりぐさ科ノ染色體研究 XV. むぎすげトぐれーんすげノ異數體

抄録

In this paper two new examples of intraspecific aneuploidy found in Carer macroglossa FRANCH. et SAV. and C. parciflora BOOTT have been reported.
Meiosis of eight plants of C. macroglossa was investigated acid three aneuploid chromosome numbers, n=23, 24 and 25, have been found. Chromosome behavior in meiosis of all these plants has been proved to be quite normal (cf. Table 1, Figs. 1-6).
Meiosis of five plants of C. parciflora was studied and here also three aneuploid chromosome numbers have been found, i.e, n=19, 20 and 22. Chromosome behavior of all these plants has been proved to be quite normal (cf. Table 1, Figs. 7-12).
All plants with structural hybridities as well as all Intraspecific aneuploid plants in the Sect. Paniceae have been analysed cytologically in order to detect a basic number in this section. The structural hybridities reported in C. pilosa by OKUNO (1940) would deserve critique.
All aneuploid plants found in the Sect. Paniceae may probably be secondarily balnced types. Aneuploid series of chromosome numbers found in this section is too complicated to be explained by a single basic chromosome number (e.g. b=7, suggested by HEILBORN (1939)). It is suggested that this aneuploidy may probably owe to the co-operation of b=6 which presents in the Sect. Siderostictae and of b=9, 10 which present in the Sect. Montanae.