Table 2. Summary of FISH Analysis of Centromere-Specific Satellite Repeats in Six Diploid Solanum Species.
Repeat | DM1-3 S. tuberosum (A Genome) | S. verrucosum (A Genome) | S. jamesii (B Genome) | S. chromatophilum (P Genome) | S. lycopersicum (T Genome) | S. etuberosum, S. palustre (E Genome)a |
---|---|---|---|---|---|---|
St49 | One location to Cen5, another noncentromeric location on the second chromosome | Strong centromeric and/or pericentromeric signals on multiple chromosomes | Strong centromeric and/or pericentromeric signals on multiple chromosomes | Strong centromeric and/or pericentromeric signals on multiple chromosomes | Telomeric signals on all chromosomes | Strong centromeric and/or pericentromeric signals on multiple chromosomes and weak telomeric signals on all chromosomes |
St18 | Specific to Cen9 | Single centromeric location, not Cen9 | No hybridizationb | Dispersed signals at all chromosomes, enhanced centromeric/pericentromeric signals at some chromosomes (Figure 9l) | No hybridization | No hybridization |
St24 | Specific to Cen1 | Single centromeric location, not Cen1 | No hybridization | No hybridization | No hybridization | No hybridization |
St57 | Specific to Cen7 | Specific to Cen7 | No hybridization | No hybridization | No hybridization | No hybridization |
St3-58 | Specific to Cen2 | No hybridization | No hybridization | No hybridization | No hybridization | No hybridization |
St3-238 | Specific to Cen8 | No hybridization | No hybridization | Dispersed signals at all chromosomes, enhanced centromeric/pericentromeric signals at some chromosomes | No hybridization | No hybridization |
St3-294c | Specific to Cen3 | No hybridization | No hybridization | Dispersed signals at all chromosomes, enhanced centromeric/pericentromeric signals at some chromosomes | No hybridization | No hybridization |
Both S. etuberosum and S. palustre contain the E genome. The FISH results from these two species were identical.
“No hybridization” refers to all FISH signal patterns with very weak and dispersed hybridization or patterns that are inconsistent and are not specific to centromeric regions. See one example in Figure 9N.
A St3-294 probe that excludes St18-related sequences was used in FISH analysis.