Polyploidy-- defined as the possession of three or more sets of chromosome-- is common in plants. The genetics of polyploids are more complicated than the genetics of diploids, and polyploids are often avoided by studies of population genetics, quantitative genetics and phylogenetics. In the heyday of the cytogenetics era, however, polyploids were an object of fascination. Meticulous studies of polyploid chromosome behavior, allele segregation, aneuploidy, triploidy, gametic non-reducation and other phenomenon were made in cultivars, crop species, and sometimes native plants.
The Ramsey lab has a longstanding interest in polyploid speciation and the systematics of polyploid complexes. We have found "classical" data from the cytogenetics era to be useful in understanding polyploids, especially young polyploids ("neopolyploids"). You can read about neopolyploidy in the papers below. The data used for statistical analysis and graphs in these manuscripts are available for download below.
Ramsey & Schemske 1998
Web Table 1. Frequency of unreduced pollen and eggs in hybrid and non-hybrid systems.
Web Table 2. Triploid block between autotetraploids and their progenitor diploids.
Web Table 3. Pollen fertility and cytotype for triploids of hybrid and non-hybrid origin.
Web Table 4. Pollen fertility and seed set in triploids of hybrid and non-hybrid origin.
Web Table 5. Cytotype distribution of progeny derived from crosses with triploid parents.
Web Table 6. Frequency of spontaneous polyploids observed in hybrid and non-hybrid systems.
Web Table 7. Pollen viability of F1 hybrids observed to produce spontaneous polyploids.
Web Table 8. References for Web Tables.
Ramsey & Schemske 2002
Web Table 1. Chromosome pairing behavior of newly-formed auto- and allopolyploids.
Web Table 2. Patterns of inheritance in newly-formed auto- and allopolyploids.
Web Table 3. Segregation in accessions of newly-formed allopolyploids.
Web Table 4. Aneuploidy in pollen generated by neopolyploids.
Web Table 5. Aneuploidy in the progeny of neopolyploids.
Web Table 6. Chromosome transmission in euploid and aneuploid cytotypes in neopolyploid populations.
Web Table 7. Pollen fertility and seed fertility of neopolyploids and their progenitors.
Web Table 8. Evolution of fertility and meiotic behavior in neopolyploid populations.
Web Table 9. Pollen viability of naturally-occurring polyploids and related diploids.
Web Table 10. Occurrence of aneuploids, polyploids and polyhaploids in progeny of polyploids.
Web Table 11. Occurrence, origin and characteristics of polyhaploids produced by polyploids.
Web Table 12. Breakdown of self-incompatibility in neopolyploids.
Web Table 13. References for Web Tables.