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Figure 1. Chromosome pairing in three hybrids having ST464-A1 or ST464-A2 in their parentage. Pairing configurations and pedigrees are: A = 1IV + 12II in a Rusty//1D(1A)/ST464-A2 hybrid; B = 1IV + 11II + 2I in a Langdon 4D(4A)/ST464-A1 hybrid; and C = 1III + 12II + 1I in a Line 47-1 4D(4B)/ST464-A2 hybrid. Legend: rq, ring quadrivalent; rb, rod bivalent; u, univalent; oq, open quadrivalent; t, trivalent.
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