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Effect of inv6 genotype on pollen viability (mean ± 1 SE) of wild Iron Mountain M. guttatus plants (2007; n = 177). Individuals were assigned to genotypic categories (inv6, no inv6) based on their alleles at the diagnostic markers e423 and e723. An inv6 assignment indicates a heterozygous individual, as the two inv6 homozygotes in the dataset were excluded.
