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Relationship between generation means for frequency of the Fronteira (large rhizosheath donor) alleles measured for progeny of Fronteira × EGA Burke (open circles) and Fronteira × Yitpi (closed circles) crosses. Standard errors of each mean are also included. Least-squares relationships are: Fronteira × EGA Burke (dashed line), Y=1.38+1.86X (r 2=0.76, P<0.05); and Fronteira × Yitpi (solid line), Y=1.04+1.90X (r 2=0.81, P<0.01).
