Open AccessKaryotype analysis of Solanum torvum Sw. - an ethnobotanical Solanaceous species of Tripura, North East India
Author(s) -
H. Reshmi Singha,
Bipul Das Chowdhury,
Sangram Sinha,
Rabindra Kumar Sinha
Publication year - 2018
Publication title -
plant science today
Language(s) - English
Resource type - Journals
ISSN - 2348-1900
DOI - 10.14719/pst.2018.5.4.421
Subject(s) - karyotype , biology , secondary constriction , ploidy , botany , chromosome , somatic cell , endemism , zoology , genetics , ecology , gene
Solanum torvum Sw. is a wild Solanaceous plant species, commonly used by the indigenous people of Tripura. Cytological study of the species was carried out to determine the somatic chromosome number and to construct the karyotype formula. The detailed karyomorphological analysis revealed 2n=24 somatic chromosomes having haploid number n=12. The size of chromosomal complement was found to range from 2.14±0.21 to 4.02±0.26 µm with a pair of chromosomes bearing secondary constrictions. Strictly median primary constriction was recorded in two pairs of chromosomes. In general, karyotype formula was found to be A2B4C18. The detailed karyotype analysis revealed that chromosomes are generally small in size and fall under the Stebbins category of “2A” indicating symmetrical nature of the karyotype. The present study could be utilised in understanding the cytogenetic nature of the species and for future crop improvement programme.