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In blueberries (Vaccinium spp), 2n pollen production has been identified in both diploid and tetraploid populations. High 2n pollen producers from diploid V. elliotti, diploid V. darrowi, and tetraploid V. pallidum were chosen for meiotic studies. Cytological examination revealed spindle abnormalities, including parallel spindles and tripolar spindles, as well as synaptic irregularities. These aberrations would result in gametes having the genetic equivalent of first division restitution near the centromere and in portions of the chromosome that are not recombinant. Such gametes would be expected to transmit a high level of heterozygosity to resulting progeny. Reciprocal diploid by tetraploid cultivar crosses were made to evaluate the viability of the 2n gametes in the diploids, and to assess the usefulness of the diploids as parents in a breeding program.