Cytological Studies on Calli, in vitro and in vivo Plants of Trachyspermum roxburghianum (DC.) Craib.

抄録

The ploidy levels of the in vitro and the in vivo plants of T. roxburghianum were invariably tetraploid (2n=4x=44). The chromosome number of calli were 2n=2x=22 and 2n=8x=88, amidst the normal chromosome number of 2n=4x=44. Changes in the chromosome length, disparity index, variation coefficient and total forma percentage were noticed. The diakinesis and metaphase stages of the in vitro flower showed quadrivalents among bivalents, whereas the same stages of the in vivo plant showed bivalents only.