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. 2018 Jan 23;13(1):e0190924. doi: 10.1371/journal.pone.0190924

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© 2018 Knytl et al

This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

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Fig 8 — Alternative hypothetical scenarios for the origin of a triploid hybrid female with 156 chromosomes, together with the genomes of C. gibelio (A) and C. carassius (B). Scenario A) Genome addition hypothesis. Scenario B) Spontaneous allotriploid origin. Capital letters “A” and “B” denote somatic genome; lowercase letters “a” and “b” show gamete chromosome complement (both egg and spermatozoa). Asterisk marks unusual number of chromosomes in the egg. 56/106 chromosomes instead of 50/100 in female gametes, respectively, might be caused by unequal chromosome segregation during meiosis II.