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De Novo Reporting of B Chromosomes with Their Bewildermentic Responses in Eclipta alba (L.) Hassk

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Abstract

It is a matter of great serendipity that while studying cytogenetics of Eclipta alba (L.) Hassk. we reported B chromosome. It is the maiden study regarding the reporting of B chromosomes in this plant species as per our knowledge. During the meiotic study of Eclipta alba (L.) Hassk maximum three B chromosomes were reported in Bhringraj. The study deals with the effect of B chromosomes on A chromosome chiasma frequency, chiasma distribution and pollen fertility in Eclipta alba (L.) Hassk. Results suggest that B chromosome enhances the chiasma frequency, and also increases variations in carrier and non- carrier pollen mother cells (PMCs). Moderate reduction in fertility of carrier plants, in contrast to non-carriers could also recorded. With regard to earlier investigations, the possible mechanism of action of B-chromosomes has been discussed. Aside from their intrinsic enigmatic properties B-chromosomes might be useful experiment tool to study the wider issues of genome organization and evolution in plants and make them insightful.

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ACKNOWLEDGMENTS

The authors are extremely thankful to CCRAS Jhansi, U.P., India for providing seeds of Eclipta alba (L.) Hassk. Secondly, author would like to give a sincere thanks to all the lab members of Plant Genetics Laboratory for their valuable suggestions and guidance.

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  1. Plant Genetics Laboratory, Department of Botany, University of Allahabad, 211002, Prayagraj, India

    Girjesh Kumar & Radha Mishra

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  1. Girjesh Kumar
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  2. Radha Mishra
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Correspondence to Radha Mishra.

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The authors declare that they have no conflicts of interest. This article dose not contain any studies involving animals or human participants performed by any of the authors.

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Kumar, G., Mishra, R. De Novo Reporting of B Chromosomes with Their Bewildermentic Responses in Eclipta alba (L.) Hassk. Cytol. Genet. 56, 179–184 (2022). https://doi.org/10.3103/S0095452722020050

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  • DOI: https://doi.org/10.3103/S0095452722020050

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