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Neighbor-joining (NJ) phylogenetic tree based on RT amino acid sequences of GhCRs LTR from G. raimondii and G. hirsutum. Statistical support was evaluated by bootstrapping (1,000 replications); Green squares represent RTs from G. raimondii. Red and blue circles represent RTs from the A subgenome and D subgenome of TM-1, respectively. Hollow squares and circles represent RTs from scaffolds that were unanchored to chromosomes of G. raimondii and G. hirsutum, respectively
