1977 Volume 42 Issue 3-4 Pages 465-471
Meiotic studies have been carried out in 10 species and 6 varieties. The different chromosomal associations have been analyzed, total and terminalized chiasmata counted and half chiasma per chromosome calculated. Regular bivalent formation has been observed in all the taxa. Number of bivalents ranges from 9-36 in various genera. A high number of rod bivalents has been counted in Coriandrum sativum. Pollen variability is evident in only one of the genera. Occurrence of a high number of rod bivalents and less number of chiasmata in Coriandurm sativum has been suggested to be due to inversion in the chromosomes. Autoploidy might have been responsible for the evolution of Hydrocotyl javanica. Certain changes in the groupings of various tribes of subfamily Apioideae has been suggested on the basis of the cytological studies.