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Updated: Jan 29, 2026

Fluorescent in situ Hybridization on Mitotic Chromosomes of Mosquitoes
Published on: September 17, 2012
Chromosome markers and alterations in mitotic cells from interspecific Citrus somatic hybrids analysed by
1Faculty of Agriculture, Tokyo University of Agriculture, Setagaya-ku, Tokyo 156, Japan, , , , , , JP.
Abstract:
Mitotic cells from Rough lemon (Citrus jambhiri Lush.), Ohta ponkan (C. reticulata Blanco) and two somatic hybrid plants obtained from protoplast fusion were analysed by double staining with chromomycin A3 (CMA) and 4'-6-diamidino-2-phenylindole. Only CMA-positive bands were observed in metaphasic chromosomes. The two parental karyotypes (2n=2x=18) were heteromorphic, yielding some marker chromosomes that could be identified in the somatic hybrids. One of the somatic hybrids had 2n=37 chromosomes, and the possible extra chromosome was distinguishable. The second somatic hybrid was tetraploid (2n=4x=36), with one of the chromosomes bearing a putative structural alteration. Furthermore, aneusomaty and some mitotic abnormalities were also observed in this latter plant. Such irregularities are reported for the first time for citrus somatic hybrids, and their possible causes and implications are discussed.
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