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. 2022 Feb 19;9:uhac038. doi: 10.1093/hr/uhac038

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© The Author(s) 2022. Published by Oxford University Press on behalf of Nanjing Agricultural University

This is an Open Access article distributed under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0/), which permits unrestricted reuse, distribution, and reproduction in any medium, provided the original work is properly cited.

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Evolution and divergence of the Bt cluster. a The syntenic block between the Bt cluster and its paralogous cluster in cucumber. b Evolution of the Bt cluster and its paralogous cluster in cucumber. The magenta numbers are K_s values. c, d Syntenic regions of the Bt cluster (c) and its paralogous cluster (d) among cucumber (Csa) melon (Cme), and watermelon (Cla). e, f Phylogenetic tree (e) and expression heat maps (f) of genes in the Bt cluster and its paralogs. Gray boxes indicate missing values. The magenta ‘W’ means genes only expressed in fruits of wild accessions. The magenta abbreviations are the same as in reference 18. Triangles mean premature translational termination. The CDSs of CmBt and CmBt′ are identical. One gene in the Bt paralogous cluster, exhibiting high expression in the roots of cucurbit crops, is designated Brp.