Aninda Mandal1, Sudha Gupta2 and Animesh K. Datta1*
1Department of Botany, Cytogenetics, Genetics and Plant Breeding Section, University of Kalyani, Kalyani – 741235, West Bengal, India
2Department of Botany, Pteridology-Palaeobotany Section, University of Kalyani, Kalyani – 741235, West Bengal, India
*Corresponding author e-mail: dattaanimesh@gmail.com
Abstract: Cytomictic behaviour (intensity assessed from the frequency of hypo- and hyperploid meiocytes formed) is noted in a single plant (to avoid any intra plant variations) of Corchorus fascicularis Lamk. from the natural population under a unit location (West Bengal plains, Kalyani, Nadia; latitude 22°50′ to 24°11′ N, longitude 88°09′ to 88°48′ E, altitude 9.75 m, sandy loamy soil, pH-6.89) from early June to early July 2012. Meiosis has been studied from 6 samples under the assessed period. High temperature has intensified the phenomenon of cytomixis as evidenced from the enhanced frequency of hypo- and hyperploid PMCs formation without affecting pollen fertility. Apart from cytomixis, differential condensation of chromosomes, meiocytes with 2 nucleoli, occurrence of minute fragments, high frequency of univalent formation and irregular anaphase I separation are also observed. Results obtained have been discussed.
Keywords: Corchorus fascicularis, Cytomixis, Temperature effect
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