Cytogenetic characterization of the holocentric chromosomes in the aphids Myzus varians and Myzus cerasi

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Abstract

Cytogenetic investigations on the holocentric chromosomes of Myzus varians and Myzus cerasi have been carried out using silver staining and C-banding followed by chromomycin A3 (CMA3) and DAPI staining in order to improve our knowledge of these pest crop species and facilitate their identification. In M. varians C-banding pattern is pecu-: liar of each chromosome pair thus allowing the identification of all homologues and the reconstruction of a reliable karyotype whereas in M. cerasi, C-positive regions result to be limited to both the telomeric regions of the X chromosomes. In both species, silver staining localizes rDNA genes on one telomere of each X chromosome; such telomeres are the unique brightly fluorescent C-positive regions after CMA3 staining, whereas all other heterochro-matic bands result DAPI positive. © 1999 Taylor & Francis Group, LLC.

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Bizzaro, D., Barbolini, E., Mandrioli, M., Manicardi, G. C., & Mazzoni, E. (1999). Cytogenetic characterization of the holocentric chromosomes in the aphids Myzus varians and Myzus cerasi. Caryologia, 52(1–2), 81–85. https://doi.org/10.1080/00087114.1998.10589157

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