Tropical Plant Research

Anushree Dolai and Asis Kumar Nandi*

*Cytology and Molecular laboratory, Department of Botany and Forestry, Vidyasagar University, Midnapore, West Bengal, India

DOI: https://doi.org/10.22271/tpr.2020.v7.i1.008

Abstract:
Crinum asiaticum and C. latifolium are two ornamental plant species with medicinal importance. These species have a host of biomolecules of pharmaceutical uses. The chromosomal study is a very basic one in characterizing the genetic material of a species. Earlier reports on such studies have shown both of 22 and 24 to represent the diploid number of chromosomes in the somatic cell of Crinum sp. The present study confirmed the 2n number as 22 for both of the species. However, these two species differ in respect of different parameters. Chromosome types are 10 metacentric and 12 submetacentric in C. asiaticum, while 10 metacentric, 6 submetacentric and 6 subterminal chromosomes in C. latifolium. Considerable variations are also evident in the total chromosomal length of the haploid set, symmetric index, degree of karyotype asymmetry, mean centromeric asymmetry, coefficient of variation of chromosome length, coefficient of variation of the centromeric index as well as the asymmetric index. These variations provide the chromosomal identity of these two species and also the nature of the relationship in them.