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Interpretation of the origin of aberrant chromosomes generated by T-DNA insertions in the centromere of chromosome 2 and subsequent chromosome rearrangements. (A) Presumed mechanism for generating minichromosomes and other aberrant chromosomes involving T-DNA insertions. RT, reciprocal translocation; Dp, duplication; CO, crossing-over; 1, 2, α, β, γ, δ, and tl1/2 are chromosome designations. (B) Centromere structure and size of chromosomes 2, mini α, β, γ, and mini δ.
