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. 2019 Jan 9;9:1924. doi: 10.3389/fpls.2018.01924

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Copyright © 2019 Parra-Nunez, Pradillo and Santos.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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Ideogram of chromosomes 2 and 3 in Col, Ler and in the hybrid progeny obtained from the cross between both accessions before and after the chromosome duplication. Col and Ler chromosomes 2 and 3 can be distinguished after applying FISH with 5S (red) and 45S (green) rDNA probes. These differences allow the identification of the parental origin of each chromosome in the hybrid, before and after the colchicine treatment. In the tetraploid hybrid, each chromosome is accompanied by one identical chromosome and two homologous chromosomes.