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. 2023 Aug 17;14:4990. doi: 10.1038/s41467-023-40778-w

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© The Author(s) 2023

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 license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license 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 license, visit http://creativecommons.org/licenses/by/4.0/.

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Fig. 1 — a Diploid (2n) unfertilized females of strain ROS-ITi (susceptible strain, S, F0 generation) were collected and crossed to haploid (n) males of strain MR-VPi (resistant strain, R, F0 generation). Subsequently, haploid F2 males produced by F1 females were crossed individually to unfertilized S females (notice that the haploid F2 males have recombined chromosomes resulting from meiotic crossovers in their hybrid F1 mothers). Females in each of the resulting F3 families were full siblings and genetically identical because they each arose from a cross between one isogenic haploid male and S strain isogenic females. In total, 458 such F3 families were generated and used for RNA preparation (denoted Fam. 1–458). b Histogram of the recombination events for each of the three T. urticae chromosomes (Chr. 1–3) as assessed with the 458 F3 families using RNA-seq based genotypes. c The distribution of recombination events in the 458 families, as assessed with a sliding window analysis (200 kb window size with 100 kb steps; orange line; left axes), and the proportion of RS genotypes, as calculated every 50 kb (black line; right axes).