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. 2017 Feb 2;7:41457. doi: 10.1038/srep41457

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Copyright © 2017, The Author(s)

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(A) Distribution of 4DTv distances between syntenic gene pairs among rubber tree, cassava and castor bean. Segments of homologous genes were identified by locating blocks of BLAST hits (E-value 1 × 10⁻¹⁰) containing at least ten syntenic genes with less than six intervening sequences between them. The 4DTv distances between these paralogous/orthologous genes from these segments are illustrated. (B) A maximum likelihood phylogenetic tree of Euphorbiaceae species, with black cottonwood as an outgroup, based on orthologs of single-gene families. The numbers at each node display bootstrap values. The divergence time was calibrated to 58 MYA (thick black bar) using fossil evidence from Magallon et al. (1999)⁵⁵.