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FISH to a partial root tip metaphase preparation of a Tripsacum x Zea trispecies hybrid (3n = 38). Chromosomes are hybridised by a mixture of genomic DNA clones, which have been directly labelled with fluorophores. Chromosomes can be identified as originating from T. dactyloides (red signal), Z. mays (green signal) or Z. diploperennis (mixed red and green signal); chromosomes are counterstained with DAPI (blue). Photo by Tatiana Arias, courtesy of James Birchler.
