Characterization of Colocasia esculenta var. esculenta by cytogenetical analysis from Bangladesh

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Characterization of Colocasia esculenta var. esculenta by cytogenetical analysis from Bangladesh

Ashma Ahmed Warasy
Int. J. Biosci.19( 6), 150-157, December 2021.
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The study was undertaken to characterize Colocasia esculenta var.esculenta by cytogenetical analysis after staining with orcein. Complex chromocentric type of interphase nuclei and Continuous type of prophase chromosomes was observed in this study. Colocasia esculenta var.esculenta was found to possesses 2n=28 chromosomes.Persistent nucleoli was observed in this plant material suggested the late transcription of rDNA to rRNA and late transportation of rRNA from the nucleus to the cytoplasm. This material possessed metacentric and submetacentric chromosome representing heterogeneous karyotype. Individual chromosome length ranged from 0.72±0.05-2.34±0.05µm. Distance between small and large chromosome was about 1.62µm indicating the gradual decrease of chromosome length. The Total form percentage was 41.56%. Karyotype symmetry and asymmetry index was 71.11% and 58.44%, respectively. Moderately asymmetric karyotype was found in this material. Therefore, the interphase nuclei, prophase chromosome and metaphase chromosome of Colocasia esculenta var. esculenta can be characterized cytogenetically with the above features.


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