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Neighbor-Joining Tree of Y1 Sequences.
Sequences in the region defined by GenBank positions 1331 to 2185 obtained from all Z. mays inbred lines and exotic lines were constructed using the Kimura two-parameter model. Bootstrap values are shown as percentages over 1000 replicates. Maize inbred lines are denoted with W, Y, or O before the name, indicating the phenotype white, yellow, or orange, respectively.
