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. 2022 Jul 26;30(2-3):241–253. doi: 10.1007/s10577-022-09691-8

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© The Author(s) 2022

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/.

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Fig. 2 — Meiotic drive of accessory chromosomes in Z. tritici. a Accessory chromosomes show presence/absence polymorphisms among individuals in populations and thus can be unpaired during meiosis. The chromosomal drive during meiosis in Z. tritici is restricted to female-inherited and unpaired accessory chromosomes (light blue) and causes an overrepresentation of female-inherited unpaired accessory chromosomes in the progeny. b Male-inherited unpaired accessory chromosomes (light blue) show Mendelian segregation as well as the paired accessory chromosomes (light green and dark green). The potential mechanism of the meiotic drive of accessory chromosomes likely involves additional replication that can happen either c prior to the fusion of two haploid gametes or d in the diploid zygote. If c is true, all chromosomes in the female haploid gamete should be amplified (red arrow), and in the zygote, the additional copies of paired accessory chromosomes must be deleted (red cross). Alternatively, d the unpaired female-inherited accessory chromosomes are amplified in the zygote. For simplicity, recombination events are not shown