Karyology of the twelve accessions of Carthamus tinctorius L. were investigated. Diploid chromosome numbers and the basic chromosome number of the studied accessions were obtained as 2n=24 and x=12 respectively. The chromosomes were assorted in to different categories on the basis of arm's ratio. These were further subdivided in to different types, on the basis of total length of the chromosome. From an evolutionary point of view, variation in total chromosome length without major changes in the karyotype formula suggests that changes in the amounts of genomic DNA are proportional to the relative length of each chromosome arm. All the accessions possessed symmetrical or slightly asymmetrical karyotype. The karyological results of the study and the analysis of chromosomal morphology of each accession are shown as tables. These findings may provide useful information for Carthamus evolutionary, genetic, and breeding studies.
SummaryThe 7 accessions of Carthamus tinctorius from different locations were analyzed in detail for establishing the chromosome and karyotype polymorphism. All 12 pachytene chromosomes were clearly identified on the basis of length, arm ratio, centromeric index, symmetry index, total chromatin length and Percent chromomere per chromosome. The karyotype and heterochromatin distribution patterns reported in this study provide a foundation toward cytological characterization of the Carthamus genome. The chromosome size ranges between 546.53 mm to 933.53 mm. Variability within the individual chromosomes with respect to the size, shape and position of the centromere was found to be well marked. Chromosomes were arranged from 1 to 12 following a descending order of length. At pachytene, the pollen mother cells have 12 bivalents and prominent nucleolus. The accessions exhibited significant variability in their pachytene chromosome characteristics.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
customersupport@researchsolutions.com
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
Copyright © 2024 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.