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Schematic of maize chromosomes showing the approximate bin locations of the tr-Ac elements. The locations of the two original donor Acs used to develop new tr-Acs are highlighted by the small open arrowhead and bin location (P1-vv) at 1.03 or the small shaded arrowhead and bin location (bti97156::Ac) at 5.04. The tr-Acs are distributed on each of the 10 chromosomes and are indicated as either open (P1-vv, donor Ac) or solid arrowheads (bti97156::Ac, donor Ac).
