Abstract
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.
Highlights
Solanum torvum Sw. belonging to the family Solanaceae, is one of the important ethnobotanical wild species of Tripura, North East India
The S. torvum is mostly distributed in road sides and waste places
Karyotype analyses have been regarded as an important method for exploring the genomic information of organisms, endowed with the length of chromosome, arm ratio, relative length of chromosome and position of centromeres [14]
Summary
Solanum torvum Sw. belonging to the family Solanaceae, is one of the important ethnobotanical wild species of Tripura, North East India. S. torvum (arrow indicating secondary constriction bearing chromosomes) research. In this era of modern molecular techniques, cytology is still a valuable method for taxonomy and diversity studies [12]. Karyotype analyses have been regarded as an important method for exploring the genomic information of organisms, endowed with the length of chromosome, arm ratio, relative length of chromosome and position of centromeres [14]. Chromosomal study and karyotype analysis have been regarded as an important step for genetic improvement programmes and conservation of wild gene pool [15]. The present study has been carried out to explore the karyomorphological details of S. torvum – a useful Solanaceous wild species of Tripura, North East India
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